./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_tiling_tcpy.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 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:49:13,885 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:49:13,944 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:49:13,956 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:49:13,956 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:49:13,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:49:13,981 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:49:13,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:49:13,982 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:49:13,983 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:49:13,984 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:49:13,984 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:49:13,984 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:49:13,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:49:13,986 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:49:13,986 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:49:13,986 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:49:13,986 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:49:13,986 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:49:13,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:49:13,987 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:49:13,987 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:49:13,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:49:13,988 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:49:13,988 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:49:13,988 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:49:13,988 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:49:13,988 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:49:13,989 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:49:13,989 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:49:13,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:49:13,989 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:49:13,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:49:13,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:49:13,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:49:13,990 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:49:13,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:49:13,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:49:13,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:49:13,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:49:13,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:49:13,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:49:13,991 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e [2024-11-16 02:49:14,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:49:14,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:49:14,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:49:14,212 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:49:14,213 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:49:14,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2024-11-16 02:49:15,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:49:15,585 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:49:15,586 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2024-11-16 02:49:15,591 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfc235bd3/68043044e67642d09e1883ea47e45e2f/FLAG20709ebea [2024-11-16 02:49:15,603 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfc235bd3/68043044e67642d09e1883ea47e45e2f [2024-11-16 02:49:15,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:49:15,607 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:49:15,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:49:15,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:49:15,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:49:15,618 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6421df7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15, skipping insertion in model container [2024-11-16 02:49:15,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:49:15,763 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-cav19/array_tiling_tcpy.c[408,421] [2024-11-16 02:49:15,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:49:15,783 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:49:15,793 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-cav19/array_tiling_tcpy.c[408,421] [2024-11-16 02:49:15,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:49:15,816 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:49:15,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15 WrapperNode [2024-11-16 02:49:15,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:49:15,818 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:49:15,818 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:49:15,818 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:49:15,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,846 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2024-11-16 02:49:15,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:49:15,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:49:15,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:49:15,848 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:49:15,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,862 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,881 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 3, 3]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-11-16 02:49:15,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,882 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,886 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,893 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:49:15,896 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:49:15,896 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:49:15,896 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:49:15,898 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (1/1) ... [2024-11-16 02:49:15,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:49:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:15,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:49:15,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:49:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:49:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-16 02:49:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-16 02:49:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:49:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:49:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:49:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 02:49:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:49:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:49:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:49:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:49:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:49:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:49:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:49:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:49:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 02:49:16,067 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:49:16,069 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:49:16,173 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#acopy~0#1.base, main_~#acopy~0#1.offset);havoc main_~#acopy~0#1.base, main_~#acopy~0#1.offset; [2024-11-16 02:49:16,180 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-16 02:49:16,180 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:49:16,190 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:49:16,190 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:49:16,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:49:16 BoogieIcfgContainer [2024-11-16 02:49:16,191 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:49:16,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:49:16,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:49:16,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:49:16,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:49:15" (1/3) ... [2024-11-16 02:49:16,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aad3793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:49:16, skipping insertion in model container [2024-11-16 02:49:16,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:49:15" (2/3) ... [2024-11-16 02:49:16,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aad3793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:49:16, skipping insertion in model container [2024-11-16 02:49:16,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:49:16" (3/3) ... [2024-11-16 02:49:16,199 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2024-11-16 02:49:16,214 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:49:16,214 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:49:16,264 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:49:16,275 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;@1d88fa1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:49:16,276 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:49:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-16 02:49:16,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:16,290 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:16,291 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:16,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash -708691949, now seen corresponding path program 1 times [2024-11-16 02:49:16,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539397811] [2024-11-16 02:49:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:16,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:16,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:16,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:16,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539397811] [2024-11-16 02:49:16,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539397811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:49:16,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:49:16,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:49:16,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428443347] [2024-11-16 02:49:16,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:49:16,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:49:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:49:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:49:16,519 INFO L87 Difference]: Start difference. First operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:16,533 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2024-11-16 02:49:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:49:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-16 02:49:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:16,540 INFO L225 Difference]: With dead ends: 44 [2024-11-16 02:49:16,541 INFO L226 Difference]: Without dead ends: 19 [2024-11-16 02:49:16,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:49:16,545 INFO L432 NwaCegarLoop]: 25 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, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:16,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:49:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-16 02:49:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-16 02:49:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-16 02:49:16,604 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2024-11-16 02:49:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:16,604 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-16 02:49:16,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-16 02:49:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-16 02:49:16,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:16,605 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:16,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:49:16,606 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:16,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1078307285, now seen corresponding path program 1 times [2024-11-16 02:49:16,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:16,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504091498] [2024-11-16 02:49:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:16,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:16,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:16,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504091498] [2024-11-16 02:49:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504091498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:49:16,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:49:16,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:49:16,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593003079] [2024-11-16 02:49:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:49:16,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:49:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:49:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:49:16,804 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:16,844 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-11-16 02:49:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:49:16,844 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-16 02:49:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:16,845 INFO L225 Difference]: With dead ends: 38 [2024-11-16 02:49:16,845 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 02:49:16,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:49:16,846 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:16,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:49:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 02:49:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2024-11-16 02:49:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-16 02:49:16,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 21 [2024-11-16 02:49:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:16,856 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-16 02:49:16,856 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-16 02:49:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-16 02:49:16,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:16,858 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:16,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:49:16,858 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:16,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1317015060, now seen corresponding path program 1 times [2024-11-16 02:49:16,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:16,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257811224] [2024-11-16 02:49:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:17,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:17,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257811224] [2024-11-16 02:49:17,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257811224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233981479] [2024-11-16 02:49:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:17,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:17,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:17,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:17,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:49:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:17,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:49:17,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:17,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:17,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233981479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:17,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:17,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-11-16 02:49:17,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17437661] [2024-11-16 02:49:17,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:17,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:49:17,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:17,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:49:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:49:17,555 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:17,722 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2024-11-16 02:49:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 02:49:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2024-11-16 02:49:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:17,724 INFO L225 Difference]: With dead ends: 42 [2024-11-16 02:49:17,724 INFO L226 Difference]: Without dead ends: 34 [2024-11-16 02:49:17,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:49:17,727 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:17,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:49:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-16 02:49:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2024-11-16 02:49:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-11-16 02:49:17,735 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2024-11-16 02:49:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:17,736 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-11-16 02:49:17,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-11-16 02:49:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 02:49:17,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:17,737 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:17,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:49:17,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:17,938 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:17,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -235482406, now seen corresponding path program 1 times [2024-11-16 02:49:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:17,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990499060] [2024-11-16 02:49:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:18,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:18,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:18,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:18,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990499060] [2024-11-16 02:49:18,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990499060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:18,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877671992] [2024-11-16 02:49:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:18,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:18,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:18,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:18,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:49:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:18,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 02:49:18,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:18,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-16 02:49:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:18,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:18,875 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:49:18,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:49:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:18,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877671992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:18,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:18,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 22 [2024-11-16 02:49:18,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106864763] [2024-11-16 02:49:18,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:18,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 02:49:18,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 02:49:18,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-16 02:49:18,944 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:19,124 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-11-16 02:49:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 02:49:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-16 02:49:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:19,125 INFO L225 Difference]: With dead ends: 34 [2024-11-16 02:49:19,125 INFO L226 Difference]: Without dead ends: 31 [2024-11-16 02:49:19,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:49:19,126 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:19,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 161 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:49:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-16 02:49:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-11-16 02:49:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-11-16 02:49:19,131 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 29 [2024-11-16 02:49:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:19,131 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-11-16 02:49:19,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-11-16 02:49:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 02:49:19,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:19,147 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:19,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 02:49:19,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:49:19,352 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:19,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash -792081503, now seen corresponding path program 2 times [2024-11-16 02:49:19,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:19,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379103858] [2024-11-16 02:49:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:19,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:19,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:19,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:19,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379103858] [2024-11-16 02:49:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379103858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:19,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8229065] [2024-11-16 02:49:19,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:49:19,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:19,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:19,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:19,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:49:19,774 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:49:19,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:19,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-16 02:49:19,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:19,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2024-11-16 02:49:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:20,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:20,196 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-11-16 02:49:20,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2024-11-16 02:49:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8229065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:20,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:20,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 26 [2024-11-16 02:49:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192979644] [2024-11-16 02:49:20,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:20,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 02:49:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 02:49:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:49:20,260 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:20,591 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2024-11-16 02:49:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 02:49:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-16 02:49:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:20,593 INFO L225 Difference]: With dead ends: 59 [2024-11-16 02:49:20,593 INFO L226 Difference]: Without dead ends: 56 [2024-11-16 02:49:20,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 02:49:20,594 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:20,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 221 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:49:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-16 02:49:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2024-11-16 02:49:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-16 02:49:20,607 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2024-11-16 02:49:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:20,608 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-16 02:49:20,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-16 02:49:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 02:49:20,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:20,609 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:20,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 02:49:20,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:20,810 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:20,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1470822168, now seen corresponding path program 3 times [2024-11-16 02:49:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131094591] [2024-11-16 02:49:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:21,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:21,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:21,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:21,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131094591] [2024-11-16 02:49:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131094591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75823122] [2024-11-16 02:49:21,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:49:21,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:21,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:21,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:49:21,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:49:21,306 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:21,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-16 02:49:21,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:21,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2024-11-16 02:49:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:21,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2024-11-16 02:49:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:21,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:22,073 INFO L349 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2024-11-16 02:49:22,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 61 [2024-11-16 02:49:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:22,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75823122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:22,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:22,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2024-11-16 02:49:22,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116676541] [2024-11-16 02:49:22,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:22,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-16 02:49:22,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-16 02:49:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2024-11-16 02:49:22,124 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:22,813 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2024-11-16 02:49:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-16 02:49:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-11-16 02:49:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:22,814 INFO L225 Difference]: With dead ends: 108 [2024-11-16 02:49:22,814 INFO L226 Difference]: Without dead ends: 105 [2024-11-16 02:49:22,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=555, Invalid=1895, Unknown=0, NotChecked=0, Total=2450 [2024-11-16 02:49:22,820 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:22,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 377 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:49:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-16 02:49:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 60. [2024-11-16 02:49:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-11-16 02:49:22,839 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 37 [2024-11-16 02:49:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:22,840 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-11-16 02:49:22,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-11-16 02:49:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 02:49:22,841 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:22,841 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:22,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 02:49:23,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:23,042 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:23,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:23,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1408806049, now seen corresponding path program 4 times [2024-11-16 02:49:23,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:23,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846556402] [2024-11-16 02:49:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:23,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:23,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:23,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:23,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846556402] [2024-11-16 02:49:23,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846556402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:23,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369147930] [2024-11-16 02:49:23,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:49:23,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:23,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:23,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:49:23,506 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:49:23,507 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:23,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-16 02:49:23,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:23,544 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 30 treesize of output 31 [2024-11-16 02:49:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:23,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:23,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:49:23,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 62 [2024-11-16 02:49:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:24,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:24,167 INFO L349 Elim1Store]: treesize reduction 36, result has 33.3 percent of original size [2024-11-16 02:49:24,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 83 treesize of output 63 [2024-11-16 02:49:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:24,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369147930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:24,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:24,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2024-11-16 02:49:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614540158] [2024-11-16 02:49:24,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:24,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 02:49:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 02:49:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:49:24,232 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:24,916 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2024-11-16 02:49:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-16 02:49:24,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-11-16 02:49:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:24,918 INFO L225 Difference]: With dead ends: 112 [2024-11-16 02:49:24,918 INFO L226 Difference]: Without dead ends: 109 [2024-11-16 02:49:24,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-11-16 02:49:24,919 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 68 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:24,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 410 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 379 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 02:49:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-16 02:49:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 60. [2024-11-16 02:49:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-11-16 02:49:24,932 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 37 [2024-11-16 02:49:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:24,933 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-11-16 02:49:24,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-11-16 02:49:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 02:49:24,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:24,934 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:24,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:49:25,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:25,134 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:25,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 367821222, now seen corresponding path program 5 times [2024-11-16 02:49:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:25,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919008214] [2024-11-16 02:49:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:25,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:25,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:25,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:25,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:25,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919008214] [2024-11-16 02:49:25,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919008214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:25,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068748289] [2024-11-16 02:49:25,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:49:25,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:25,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:25,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:49:25,527 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-16 02:49:25,527 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:25,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-16 02:49:25,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:25,564 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 30 treesize of output 31 [2024-11-16 02:49:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:25,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:26,046 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:49:26,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:49:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:26,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068748289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:26,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:26,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2024-11-16 02:49:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173625838] [2024-11-16 02:49:26,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:26,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-16 02:49:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-16 02:49:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2024-11-16 02:49:26,107 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:26,509 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2024-11-16 02:49:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 02:49:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-16 02:49:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:26,510 INFO L225 Difference]: With dead ends: 127 [2024-11-16 02:49:26,510 INFO L226 Difference]: Without dead ends: 124 [2024-11-16 02:49:26,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 02:49:26,511 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:26,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 657 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:49:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-16 02:49:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2024-11-16 02:49:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-11-16 02:49:26,526 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 41 [2024-11-16 02:49:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:26,527 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-11-16 02:49:26,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-11-16 02:49:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-16 02:49:26,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:26,529 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:26,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 02:49:26,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:26,730 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:26,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1465443986, now seen corresponding path program 6 times [2024-11-16 02:49:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:26,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710246051] [2024-11-16 02:49:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:27,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:27,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:27,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:27,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710246051] [2024-11-16 02:49:27,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710246051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:27,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173397881] [2024-11-16 02:49:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:49:27,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:27,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:27,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:49:27,254 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-16 02:49:27,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:27,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-16 02:49:27,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:27,279 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 30 treesize of output 19 [2024-11-16 02:49:27,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:27,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2024-11-16 02:49:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:27,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:27,829 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2024-11-16 02:49:27,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 47 [2024-11-16 02:49:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:27,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173397881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:27,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:27,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2024-11-16 02:49:27,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074776377] [2024-11-16 02:49:27,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:27,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 02:49:27,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 02:49:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2024-11-16 02:49:27,886 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:28,418 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2024-11-16 02:49:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 02:49:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-11-16 02:49:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:28,420 INFO L225 Difference]: With dead ends: 135 [2024-11-16 02:49:28,420 INFO L226 Difference]: Without dead ends: 132 [2024-11-16 02:49:28,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2024-11-16 02:49:28,421 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:28,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 487 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:49:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-16 02:49:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 62. [2024-11-16 02:49:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2024-11-16 02:49:28,435 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 43 [2024-11-16 02:49:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:28,435 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2024-11-16 02:49:28,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2024-11-16 02:49:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 02:49:28,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:28,436 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:28,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 02:49:28,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:28,639 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:28,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1844664267, now seen corresponding path program 7 times [2024-11-16 02:49:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532793211] [2024-11-16 02:49:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:29,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:29,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:29,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532793211] [2024-11-16 02:49:29,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532793211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787244501] [2024-11-16 02:49:29,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:49:29,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:29,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:29,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:29,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:49:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:29,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-16 02:49:29,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:29,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2024-11-16 02:49:29,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:29,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2024-11-16 02:49:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:29,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:49:29,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 64 [2024-11-16 02:49:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:29,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:30,242 INFO L349 Elim1Store]: treesize reduction 15, result has 59.5 percent of original size [2024-11-16 02:49:30,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 107 treesize of output 87 [2024-11-16 02:49:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787244501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:30,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:30,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 40 [2024-11-16 02:49:30,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137637004] [2024-11-16 02:49:30,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:30,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-16 02:49:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-16 02:49:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2024-11-16 02:49:30,293 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 40 states, 40 states have (on average 2.7) internal successors, (108), 39 states have internal predecessors, (108), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:31,127 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2024-11-16 02:49:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 02:49:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 39 states have internal predecessors, (108), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-16 02:49:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:31,128 INFO L225 Difference]: With dead ends: 152 [2024-11-16 02:49:31,128 INFO L226 Difference]: Without dead ends: 122 [2024-11-16 02:49:31,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=598, Invalid=3184, Unknown=0, NotChecked=0, Total=3782 [2024-11-16 02:49:31,130 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:31,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 453 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:49:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-16 02:49:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2024-11-16 02:49:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.075) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2024-11-16 02:49:31,152 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 47 [2024-11-16 02:49:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:31,152 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2024-11-16 02:49:31,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 39 states have internal predecessors, (108), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2024-11-16 02:49:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 02:49:31,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:31,153 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:31,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:49:31,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 02:49:31,354 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:31,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:31,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2007272364, now seen corresponding path program 8 times [2024-11-16 02:49:31,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:31,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058325644] [2024-11-16 02:49:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:31,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:31,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:31,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058325644] [2024-11-16 02:49:31,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058325644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336603909] [2024-11-16 02:49:31,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:49:31,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:31,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:31,720 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:31,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:49:31,787 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:49:31,787 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:31,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-16 02:49:31,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:31,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-16 02:49:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:32,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:32,466 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:49:32,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:49:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:32,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336603909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:32,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:32,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 40 [2024-11-16 02:49:32,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652600371] [2024-11-16 02:49:32,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:32,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-16 02:49:32,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-16 02:49:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2024-11-16 02:49:32,627 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 40 states, 40 states have (on average 2.7) internal successors, (108), 39 states have internal predecessors, (108), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:33,182 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2024-11-16 02:49:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-16 02:49:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 39 states have internal predecessors, (108), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-16 02:49:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:33,183 INFO L225 Difference]: With dead ends: 138 [2024-11-16 02:49:33,183 INFO L226 Difference]: Without dead ends: 135 [2024-11-16 02:49:33,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=2389, Unknown=0, NotChecked=0, Total=2652 [2024-11-16 02:49:33,184 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 80 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:33,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 779 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:49:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-16 02:49:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 64. [2024-11-16 02:49:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2024-11-16 02:49:33,199 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 47 [2024-11-16 02:49:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:33,199 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2024-11-16 02:49:33,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 39 states have internal predecessors, (108), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2024-11-16 02:49:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 02:49:33,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:33,200 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:33,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 02:49:33,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:33,403 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:33,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash 489432955, now seen corresponding path program 9 times [2024-11-16 02:49:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:33,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416975346] [2024-11-16 02:49:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:34,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:34,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:34,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416975346] [2024-11-16 02:49:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416975346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666403409] [2024-11-16 02:49:34,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:49:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:34,038 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:34,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:49:34,198 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-16 02:49:34,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:34,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-16 02:49:34,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:34,303 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 35 treesize of output 20 [2024-11-16 02:49:34,348 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-16 02:49:34,348 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 56 treesize of output 48 [2024-11-16 02:49:34,408 INFO L349 Elim1Store]: treesize reduction 28, result has 30.0 percent of original size [2024-11-16 02:49:34,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 67 [2024-11-16 02:49:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:34,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:35,250 INFO L349 Elim1Store]: treesize reduction 35, result has 28.6 percent of original size [2024-11-16 02:49:35,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 93 treesize of output 72 [2024-11-16 02:49:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:35,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666403409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:35,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:35,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 16] total 46 [2024-11-16 02:49:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810509993] [2024-11-16 02:49:35,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:35,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-16 02:49:35,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-16 02:49:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2024-11-16 02:49:35,337 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:36,889 INFO L93 Difference]: Finished difference Result 189 states and 196 transitions. [2024-11-16 02:49:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-16 02:49:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-16 02:49:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:36,890 INFO L225 Difference]: With dead ends: 189 [2024-11-16 02:49:36,890 INFO L226 Difference]: Without dead ends: 186 [2024-11-16 02:49:36,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=695, Invalid=5311, Unknown=0, NotChecked=0, Total=6006 [2024-11-16 02:49:36,892 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:36,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 706 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:49:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-16 02:49:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 90. [2024-11-16 02:49:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 86 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2024-11-16 02:49:36,924 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 53 [2024-11-16 02:49:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:36,925 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2024-11-16 02:49:36,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2024-11-16 02:49:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 02:49:36,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:36,925 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:36,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-16 02:49:37,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 02:49:37,126 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:37,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash -458786958, now seen corresponding path program 10 times [2024-11-16 02:49:37,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:37,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687207695] [2024-11-16 02:49:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:37,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:37,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687207695] [2024-11-16 02:49:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687207695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385086553] [2024-11-16 02:49:37,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:49:37,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:37,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:37,597 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:37,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 02:49:37,770 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:49:37,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:37,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-16 02:49:37,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:37,863 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 33 treesize of output 34 [2024-11-16 02:49:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:38,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:38,374 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:49:38,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:49:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:38,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385086553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:38,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:38,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-11-16 02:49:38,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318012163] [2024-11-16 02:49:38,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:38,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-16 02:49:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-16 02:49:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2024-11-16 02:49:38,485 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 43 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:38,979 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2024-11-16 02:49:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-16 02:49:38,979 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 43 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2024-11-16 02:49:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:38,980 INFO L225 Difference]: With dead ends: 152 [2024-11-16 02:49:38,980 INFO L226 Difference]: Without dead ends: 149 [2024-11-16 02:49:38,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2024-11-16 02:49:38,981 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 40 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:38,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1013 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:49:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-16 02:49:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 66. [2024-11-16 02:49:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2024-11-16 02:49:39,001 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 53 [2024-11-16 02:49:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:39,002 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2024-11-16 02:49:39,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 43 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2024-11-16 02:49:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-16 02:49:39,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:39,003 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:39,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-16 02:49:39,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 02:49:39,203 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:39,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1186038069, now seen corresponding path program 11 times [2024-11-16 02:49:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057301434] [2024-11-16 02:49:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:39,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:39,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 106 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:39,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:39,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057301434] [2024-11-16 02:49:39,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057301434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:39,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447566339] [2024-11-16 02:49:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:49:39,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:39,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:39,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 02:49:39,456 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-16 02:49:39,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:39,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 02:49:39,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:49:39,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:49:39,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447566339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:39,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:39,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 22 [2024-11-16 02:49:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741776766] [2024-11-16 02:49:39,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:39,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 02:49:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 02:49:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2024-11-16 02:49:39,608 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:39,682 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2024-11-16 02:49:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 02:49:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2024-11-16 02:49:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:39,683 INFO L225 Difference]: With dead ends: 112 [2024-11-16 02:49:39,683 INFO L226 Difference]: Without dead ends: 73 [2024-11-16 02:49:39,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2024-11-16 02:49:39,684 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:39,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 131 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:49:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-16 02:49:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2024-11-16 02:49:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-11-16 02:49:39,702 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 57 [2024-11-16 02:49:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:39,702 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-11-16 02:49:39,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-11-16 02:49:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-16 02:49:39,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:39,703 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:39,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 02:49:39,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 02:49:39,904 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:39,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 34727874, now seen corresponding path program 12 times [2024-11-16 02:49:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:39,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692406938] [2024-11-16 02:49:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:39,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:40,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:40,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:40,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692406938] [2024-11-16 02:49:40,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692406938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60466008] [2024-11-16 02:49:40,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:49:40,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:40,471 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:40,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 02:49:40,569 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-16 02:49:40,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:40,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-16 02:49:40,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:40,584 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 30 treesize of output 19 [2024-11-16 02:49:40,620 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:49:40,621 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 50 treesize of output 46 [2024-11-16 02:49:40,672 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:49:40,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 72 [2024-11-16 02:49:40,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:40,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:40,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:49:40,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 86 [2024-11-16 02:49:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:41,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:41,817 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-11-16 02:49:41,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 85 [2024-11-16 02:49:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60466008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:41,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:41,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2024-11-16 02:49:41,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263342925] [2024-11-16 02:49:41,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:41,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-16 02:49:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-16 02:49:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2024-11-16 02:49:41,858 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 45 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:42,991 INFO L93 Difference]: Finished difference Result 193 states and 200 transitions. [2024-11-16 02:49:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-16 02:49:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 45 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2024-11-16 02:49:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:42,992 INFO L225 Difference]: With dead ends: 193 [2024-11-16 02:49:42,992 INFO L226 Difference]: Without dead ends: 190 [2024-11-16 02:49:42,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=590, Invalid=3832, Unknown=0, NotChecked=0, Total=4422 [2024-11-16 02:49:42,993 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 210 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:42,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 641 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:49:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-16 02:49:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 95. [2024-11-16 02:49:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.0769230769230769) internal successors, (98), 91 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2024-11-16 02:49:43,030 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 57 [2024-11-16 02:49:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:43,031 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2024-11-16 02:49:43,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 45 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2024-11-16 02:49:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-16 02:49:43,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:43,031 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:43,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-16 02:49:43,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 02:49:43,232 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:43,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1493947640, now seen corresponding path program 13 times [2024-11-16 02:49:43,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238234518] [2024-11-16 02:49:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:43,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:43,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:43,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:43,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:43,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238234518] [2024-11-16 02:49:43,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238234518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:43,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500522190] [2024-11-16 02:49:43,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:49:43,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:43,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:43,701 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:43,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 02:49:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:43,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-16 02:49:43,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:44,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-16 02:49:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:49:44,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:44,748 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:49:44,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:49:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500522190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:45,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:45,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 18] total 52 [2024-11-16 02:49:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549275246] [2024-11-16 02:49:45,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:45,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-16 02:49:45,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-16 02:49:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2024-11-16 02:49:45,002 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 52 states, 52 states have (on average 2.769230769230769) internal successors, (144), 51 states have internal predecessors, (144), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:45,812 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2024-11-16 02:49:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 02:49:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.769230769230769) internal successors, (144), 51 states have internal predecessors, (144), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-11-16 02:49:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:45,813 INFO L225 Difference]: With dead ends: 137 [2024-11-16 02:49:45,813 INFO L226 Difference]: Without dead ends: 134 [2024-11-16 02:49:45,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=349, Invalid=4207, Unknown=0, NotChecked=0, Total=4556 [2024-11-16 02:49:45,815 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 107 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:45,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1114 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:49:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-16 02:49:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 67. [2024-11-16 02:49:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2024-11-16 02:49:45,840 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 59 [2024-11-16 02:49:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:45,840 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2024-11-16 02:49:45,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.769230769230769) internal successors, (144), 51 states have internal predecessors, (144), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:49:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2024-11-16 02:49:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-16 02:49:45,841 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:45,841 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:45,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-16 02:49:46,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:46,041 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:46,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:46,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2113917815, now seen corresponding path program 14 times [2024-11-16 02:49:46,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:46,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459402864] [2024-11-16 02:49:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:46,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:46,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:46,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 106 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:46,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459402864] [2024-11-16 02:49:46,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459402864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:46,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176399770] [2024-11-16 02:49:46,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:49:46,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:46,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:46,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:46,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 02:49:46,297 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:49:46,297 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:46,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 02:49:46,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 136 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:46,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 136 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176399770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:46,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-11-16 02:49:46,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250913891] [2024-11-16 02:49:46,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:46,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 02:49:46,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 02:49:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2024-11-16 02:49:46,594 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:46,715 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2024-11-16 02:49:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 02:49:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2024-11-16 02:49:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:46,718 INFO L225 Difference]: With dead ends: 129 [2024-11-16 02:49:46,718 INFO L226 Difference]: Without dead ends: 87 [2024-11-16 02:49:46,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 102 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2024-11-16 02:49:46,719 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:46,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 174 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:49:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-16 02:49:46,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2024-11-16 02:49:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-11-16 02:49:46,744 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 61 [2024-11-16 02:49:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:46,744 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-11-16 02:49:46,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-11-16 02:49:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-16 02:49:46,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:46,745 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:46,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-16 02:49:46,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-16 02:49:46,947 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:46,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2054235592, now seen corresponding path program 15 times [2024-11-16 02:49:46,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:46,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008952407] [2024-11-16 02:49:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:47,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:47,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008952407] [2024-11-16 02:49:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008952407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092656078] [2024-11-16 02:49:47,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:49:47,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:47,707 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:47,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 02:49:48,058 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-16 02:49:48,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:48,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-16 02:49:48,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:48,075 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 30 treesize of output 19 [2024-11-16 02:49:48,115 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:49:48,115 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 50 treesize of output 46 [2024-11-16 02:49:48,169 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:49:48,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 72 [2024-11-16 02:49:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:48,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:49:48,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:49:48,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 86 [2024-11-16 02:49:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:48,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:49,401 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-11-16 02:49:49,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 85 [2024-11-16 02:49:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:49,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092656078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:49,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:49,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2024-11-16 02:49:49,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463210542] [2024-11-16 02:49:49,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:49,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-16 02:49:49,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:49,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-16 02:49:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2175, Unknown=0, NotChecked=0, Total=2450 [2024-11-16 02:49:49,488 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 50 states, 50 states have (on average 2.98) internal successors, (149), 50 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:50,763 INFO L93 Difference]: Finished difference Result 211 states and 218 transitions. [2024-11-16 02:49:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-16 02:49:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.98) internal successors, (149), 50 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2024-11-16 02:49:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:50,764 INFO L225 Difference]: With dead ends: 211 [2024-11-16 02:49:50,764 INFO L226 Difference]: Without dead ends: 208 [2024-11-16 02:49:50,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=665, Invalid=4737, Unknown=0, NotChecked=0, Total=5402 [2024-11-16 02:49:50,766 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 292 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:50,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 711 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:49:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-16 02:49:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 105. [2024-11-16 02:49:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 101 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2024-11-16 02:49:50,813 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 63 [2024-11-16 02:49:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:50,814 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2024-11-16 02:49:50,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.98) internal successors, (149), 50 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2024-11-16 02:49:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-16 02:49:50,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:50,814 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:50,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-16 02:49:51,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-16 02:49:51,015 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:51,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1665938494, now seen corresponding path program 16 times [2024-11-16 02:49:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693001038] [2024-11-16 02:49:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:51,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:51,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:51,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:51,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:51,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693001038] [2024-11-16 02:49:51,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693001038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:51,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411410794] [2024-11-16 02:49:51,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:49:51,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:51,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:51,564 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:51,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 02:49:52,003 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:49:52,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:52,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-16 02:49:52,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:52,146 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 33 treesize of output 34 [2024-11-16 02:49:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:52,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:52,923 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:49:52,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:49:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411410794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:53,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:53,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2024-11-16 02:49:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797422006] [2024-11-16 02:49:53,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:53,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-16 02:49:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-16 02:49:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2783, Unknown=0, NotChecked=0, Total=2970 [2024-11-16 02:49:53,125 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 55 states, 55 states have (on average 2.890909090909091) internal successors, (159), 55 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:53,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:53,897 INFO L93 Difference]: Finished difference Result 151 states and 158 transitions. [2024-11-16 02:49:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 02:49:53,897 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.890909090909091) internal successors, (159), 55 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2024-11-16 02:49:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:53,898 INFO L225 Difference]: With dead ends: 151 [2024-11-16 02:49:53,898 INFO L226 Difference]: Without dead ends: 148 [2024-11-16 02:49:53,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=3857, Unknown=0, NotChecked=0, Total=4160 [2024-11-16 02:49:53,899 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 103 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:53,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1576 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:49:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-16 02:49:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 73. [2024-11-16 02:49:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:49:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2024-11-16 02:49:53,932 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 65 [2024-11-16 02:49:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:49:53,932 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2024-11-16 02:49:53,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.890909090909091) internal successors, (159), 55 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2024-11-16 02:49:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-16 02:49:53,933 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:49:53,933 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:49:53,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-16 02:49:54,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:54,134 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:49:54,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:49:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash 484767631, now seen corresponding path program 17 times [2024-11-16 02:49:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:49:54,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292714111] [2024-11-16 02:49:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:49:54,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:49:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:54,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:49:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:54,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:49:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:49:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:49:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292714111] [2024-11-16 02:49:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292714111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:49:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998964253] [2024-11-16 02:49:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:49:54,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:49:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:49:54,995 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:49:54,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 02:49:55,182 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-16 02:49:55,183 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:49:55,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-16 02:49:55,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:49:55,210 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 32 treesize of output 21 [2024-11-16 02:49:55,251 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-16 02:49:55,251 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 58 treesize of output 50 [2024-11-16 02:49:55,309 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-16 02:49:55,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 78 [2024-11-16 02:49:55,392 INFO L349 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2024-11-16 02:49:55,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 110 [2024-11-16 02:49:55,486 INFO L349 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2024-11-16 02:49:55,486 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 8 case distinctions, treesize of input 121 treesize of output 118 [2024-11-16 02:49:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:56,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:49:57,180 INFO L349 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2024-11-16 02:49:57,180 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 139 treesize of output 104 [2024-11-16 02:49:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:49:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998964253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:49:57,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:49:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 57 [2024-11-16 02:49:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088343935] [2024-11-16 02:49:57,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:49:57,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-16 02:49:57,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:49:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-16 02:49:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2024-11-16 02:49:57,234 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:49:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:49:59,936 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2024-11-16 02:49:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-16 02:49:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2024-11-16 02:49:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:49:59,937 INFO L225 Difference]: With dead ends: 236 [2024-11-16 02:49:59,937 INFO L226 Difference]: Without dead ends: 233 [2024-11-16 02:49:59,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1073, Invalid=9027, Unknown=0, NotChecked=0, Total=10100 [2024-11-16 02:49:59,938 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 02:49:59,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1144 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 02:49:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-16 02:50:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 115. [2024-11-16 02:50:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.072072072072072) internal successors, (119), 111 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2024-11-16 02:50:00,001 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 67 [2024-11-16 02:50:00,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:00,001 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2024-11-16 02:50:00,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2024-11-16 02:50:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-16 02:50:00,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:00,002 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:00,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-16 02:50:00,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:00,202 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:00,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:00,202 INFO L85 PathProgramCache]: Analyzing trace with hash -637760042, now seen corresponding path program 18 times [2024-11-16 02:50:00,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:00,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457863724] [2024-11-16 02:50:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:00,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:00,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:00,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 172 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:00,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:00,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457863724] [2024-11-16 02:50:00,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457863724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:00,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23264771] [2024-11-16 02:50:00,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:50:00,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:00,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:00,422 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:00,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 02:50:01,080 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-16 02:50:01,080 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:50:01,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 02:50:01,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 210 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:01,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:50:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 210 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:01,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23264771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:50:01,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:50:01,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2024-11-16 02:50:01,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941298984] [2024-11-16 02:50:01,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:50:01,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 02:50:01,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:50:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 02:50:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 02:50:01,494 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:50:01,701 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2024-11-16 02:50:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 02:50:01,701 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2024-11-16 02:50:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:50:01,702 INFO L225 Difference]: With dead ends: 189 [2024-11-16 02:50:01,702 INFO L226 Difference]: Without dead ends: 139 [2024-11-16 02:50:01,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=1055, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 02:50:01,703 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 48 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:50:01,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 280 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:50:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-16 02:50:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2024-11-16 02:50:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.063063063063063) internal successors, (118), 111 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2024-11-16 02:50:01,766 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 71 [2024-11-16 02:50:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:01,766 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2024-11-16 02:50:01,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2024-11-16 02:50:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-16 02:50:01,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:01,767 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:01,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-16 02:50:01,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:01,967 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:01,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2126043836, now seen corresponding path program 19 times [2024-11-16 02:50:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:01,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644412208] [2024-11-16 02:50:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:02,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:02,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:02,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:02,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644412208] [2024-11-16 02:50:02,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644412208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:02,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771089384] [2024-11-16 02:50:02,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:50:02,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:02,548 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:02,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-16 02:50:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:02,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-16 02:50:02,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:02,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-16 02:50:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 229 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:50:03,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:50:03,977 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:50:03,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:50:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:04,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771089384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:50:04,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:50:04,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 22] total 64 [2024-11-16 02:50:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816810960] [2024-11-16 02:50:04,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:50:04,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-16 02:50:04,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:50:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-16 02:50:04,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3791, Unknown=0, NotChecked=0, Total=4032 [2024-11-16 02:50:04,345 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand has 64 states, 64 states have (on average 2.8125) internal successors, (180), 63 states have internal predecessors, (180), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:50:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:50:05,690 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2024-11-16 02:50:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-16 02:50:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.8125) internal successors, (180), 63 states have internal predecessors, (180), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2024-11-16 02:50:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:50:05,693 INFO L225 Difference]: With dead ends: 165 [2024-11-16 02:50:05,693 INFO L226 Difference]: Without dead ends: 162 [2024-11-16 02:50:05,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=435, Invalid=6537, Unknown=0, NotChecked=0, Total=6972 [2024-11-16 02:50:05,694 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 127 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-16 02:50:05,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1934 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-16 02:50:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-16 02:50:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 79. [2024-11-16 02:50:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.08) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2024-11-16 02:50:05,744 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 71 [2024-11-16 02:50:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:05,744 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2024-11-16 02:50:05,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.8125) internal successors, (180), 63 states have internal predecessors, (180), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:50:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2024-11-16 02:50:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-16 02:50:05,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:05,745 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:05,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-16 02:50:05,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-16 02:50:05,945 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:05,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 479347797, now seen corresponding path program 20 times [2024-11-16 02:50:05,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640663727] [2024-11-16 02:50:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:05,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:06,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:06,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:06,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:06,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640663727] [2024-11-16 02:50:06,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640663727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:06,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726073535] [2024-11-16 02:50:06,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:50:06,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:06,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:06,804 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:06,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-16 02:50:06,959 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:50:06,959 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:50:06,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-16 02:50:06,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:06,978 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 30 treesize of output 19 [2024-11-16 02:50:07,028 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:50:07,028 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 50 treesize of output 46 [2024-11-16 02:50:07,089 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:50:07,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 72 [2024-11-16 02:50:07,166 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-11-16 02:50:07,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 102 [2024-11-16 02:50:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:07,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:50:07,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 108 [2024-11-16 02:50:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:08,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:50:09,006 INFO L349 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2024-11-16 02:50:09,006 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 139 treesize of output 104 [2024-11-16 02:50:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726073535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:50:09,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:50:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 59 [2024-11-16 02:50:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935036699] [2024-11-16 02:50:09,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:50:09,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-16 02:50:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:50:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-16 02:50:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=3064, Unknown=0, NotChecked=0, Total=3422 [2024-11-16 02:50:09,103 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 59 states have internal predecessors, (179), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:50:11,154 INFO L93 Difference]: Finished difference Result 254 states and 262 transitions. [2024-11-16 02:50:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-16 02:50:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 59 states have internal predecessors, (179), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2024-11-16 02:50:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:50:11,156 INFO L225 Difference]: With dead ends: 254 [2024-11-16 02:50:11,156 INFO L226 Difference]: Without dead ends: 251 [2024-11-16 02:50:11,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=877, Invalid=6779, Unknown=0, NotChecked=0, Total=7656 [2024-11-16 02:50:11,156 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 321 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 02:50:11,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1079 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 02:50:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-16 02:50:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 125. [2024-11-16 02:50:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 121 states have internal predecessors, (129), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2024-11-16 02:50:11,239 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 73 [2024-11-16 02:50:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:11,239 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2024-11-16 02:50:11,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 59 states have internal predecessors, (179), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2024-11-16 02:50:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-16 02:50:11,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:11,240 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:11,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-16 02:50:11,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-16 02:50:11,440 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:11,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1963591580, now seen corresponding path program 21 times [2024-11-16 02:50:11,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:11,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812377906] [2024-11-16 02:50:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:11,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:12,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:12,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:12,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812377906] [2024-11-16 02:50:12,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812377906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117030591] [2024-11-16 02:50:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:50:12,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:12,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:12,431 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:12,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-16 02:50:13,013 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-16 02:50:13,014 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:50:13,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-16 02:50:13,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:13,031 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 30 treesize of output 19 [2024-11-16 02:50:13,082 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:50:13,082 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 50 treesize of output 46 [2024-11-16 02:50:13,137 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:50:13,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 72 [2024-11-16 02:50:13,216 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-11-16 02:50:13,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 102 [2024-11-16 02:50:13,314 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-11-16 02:50:13,314 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 8 case distinctions, treesize of input 122 treesize of output 131 [2024-11-16 02:50:13,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:13,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:13,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:50:13,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 130 [2024-11-16 02:50:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:14,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:50:15,888 INFO L349 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2024-11-16 02:50:15,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 164 treesize of output 123 [2024-11-16 02:50:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:15,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117030591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:50:15,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:50:15,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 65 [2024-11-16 02:50:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529762] [2024-11-16 02:50:15,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:50:15,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-16 02:50:15,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:50:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-16 02:50:15,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=3543, Unknown=0, NotChecked=0, Total=4160 [2024-11-16 02:50:15,952 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 65 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:50:22,913 INFO L93 Difference]: Finished difference Result 387 states and 410 transitions. [2024-11-16 02:50:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-16 02:50:22,913 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 65 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2024-11-16 02:50:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:50:22,915 INFO L225 Difference]: With dead ends: 387 [2024-11-16 02:50:22,915 INFO L226 Difference]: Without dead ends: 384 [2024-11-16 02:50:22,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5159 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3457, Invalid=15725, Unknown=0, NotChecked=0, Total=19182 [2024-11-16 02:50:22,917 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 495 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 02:50:22,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1431 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 02:50:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-16 02:50:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 224. [2024-11-16 02:50:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 220 states have (on average 1.05) internal successors, (231), 220 states have internal predecessors, (231), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 235 transitions. [2024-11-16 02:50:23,108 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 235 transitions. Word has length 77 [2024-11-16 02:50:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:23,108 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 235 transitions. [2024-11-16 02:50:23,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 65 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 235 transitions. [2024-11-16 02:50:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-16 02:50:23,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:23,113 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:23,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-16 02:50:23,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:23,313 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:23,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1119930358, now seen corresponding path program 22 times [2024-11-16 02:50:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396959189] [2024-11-16 02:50:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:23,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:23,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:23,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396959189] [2024-11-16 02:50:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396959189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521798593] [2024-11-16 02:50:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:50:23,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:23,905 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:23,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-16 02:50:24,398 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:50:24,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:50:24,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-16 02:50:24,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:24,601 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 33 treesize of output 34 [2024-11-16 02:50:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:26,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:50:26,605 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:50:26,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:50:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:26,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521798593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:50:26,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:50:26,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2024-11-16 02:50:26,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223277929] [2024-11-16 02:50:26,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:50:26,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-16 02:50:26,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:50:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-16 02:50:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4190, Unknown=3, NotChecked=0, Total=4422 [2024-11-16 02:50:26,892 INFO L87 Difference]: Start difference. First operand 224 states and 235 transitions. Second operand has 67 states, 67 states have (on average 2.91044776119403) internal successors, (195), 67 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:50:28,366 INFO L93 Difference]: Finished difference Result 322 states and 333 transitions. [2024-11-16 02:50:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-16 02:50:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.91044776119403) internal successors, (195), 67 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2024-11-16 02:50:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:50:28,367 INFO L225 Difference]: With dead ends: 322 [2024-11-16 02:50:28,367 INFO L226 Difference]: Without dead ends: 319 [2024-11-16 02:50:28,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=369, Invalid=5790, Unknown=3, NotChecked=0, Total=6162 [2024-11-16 02:50:28,368 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 125 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-16 02:50:28,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 2552 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-16 02:50:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-11-16 02:50:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 184. [2024-11-16 02:50:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.05) internal successors, (189), 180 states have internal predecessors, (189), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 193 transitions. [2024-11-16 02:50:28,524 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 193 transitions. Word has length 77 [2024-11-16 02:50:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:28,525 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 193 transitions. [2024-11-16 02:50:28,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.91044776119403) internal successors, (195), 67 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 193 transitions. [2024-11-16 02:50:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-16 02:50:28,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:28,525 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:28,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-16 02:50:28,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:28,726 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:28,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1162890462, now seen corresponding path program 23 times [2024-11-16 02:50:28,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:28,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379354390] [2024-11-16 02:50:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:28,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:29,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:29,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:29,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379354390] [2024-11-16 02:50:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379354390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421181889] [2024-11-16 02:50:29,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:50:29,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:29,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:29,787 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:29,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-16 02:50:30,027 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-16 02:50:30,027 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:50:30,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-16 02:50:30,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:30,061 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 30 treesize of output 19 [2024-11-16 02:50:30,099 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:50:30,100 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 50 treesize of output 46 [2024-11-16 02:50:30,149 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-16 02:50:30,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 72 [2024-11-16 02:50:30,234 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-11-16 02:50:30,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 102 [2024-11-16 02:50:30,333 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-11-16 02:50:30,333 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 8 case distinctions, treesize of input 122 treesize of output 131 [2024-11-16 02:50:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:30,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:30,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:50:30,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:50:30,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 130 [2024-11-16 02:50:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:31,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:50:32,642 INFO L349 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2024-11-16 02:50:32,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 164 treesize of output 123 [2024-11-16 02:50:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:32,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421181889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:50:32,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:50:32,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 71 [2024-11-16 02:50:32,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255725260] [2024-11-16 02:50:32,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:50:32,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-16 02:50:32,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:50:32,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-16 02:50:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=4367, Unknown=0, NotChecked=0, Total=4970 [2024-11-16 02:50:32,763 INFO L87 Difference]: Start difference. First operand 184 states and 193 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:50:35,540 INFO L93 Difference]: Finished difference Result 440 states and 451 transitions. [2024-11-16 02:50:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-16 02:50:35,540 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2024-11-16 02:50:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:50:35,541 INFO L225 Difference]: With dead ends: 440 [2024-11-16 02:50:35,541 INFO L226 Difference]: Without dead ends: 437 [2024-11-16 02:50:35,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1253, Invalid=7303, Unknown=0, NotChecked=0, Total=8556 [2024-11-16 02:50:35,542 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 342 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-16 02:50:35,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1578 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-16 02:50:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-16 02:50:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 234. [2024-11-16 02:50:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.0521739130434782) internal successors, (242), 230 states have internal predecessors, (242), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 246 transitions. [2024-11-16 02:50:35,777 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 246 transitions. Word has length 83 [2024-11-16 02:50:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:35,777 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 246 transitions. [2024-11-16 02:50:35,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 246 transitions. [2024-11-16 02:50:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-16 02:50:35,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:35,778 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:35,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-16 02:50:35,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-16 02:50:35,978 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:35,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:35,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1965359984, now seen corresponding path program 24 times [2024-11-16 02:50:35,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:35,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741928909] [2024-11-16 02:50:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:35,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:36,763 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:36,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:36,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741928909] [2024-11-16 02:50:36,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741928909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121620783] [2024-11-16 02:50:36,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:50:36,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:36,769 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:36,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-16 02:50:38,253 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-16 02:50:38,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:50:38,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-16 02:50:38,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:38,461 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 36 treesize of output 37 [2024-11-16 02:50:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:39,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:50:40,054 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-16 02:50:40,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-16 02:50:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:40,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121620783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:50:40,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:50:40,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2024-11-16 02:50:40,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833043737] [2024-11-16 02:50:40,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:50:40,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-16 02:50:40,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:50:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-16 02:50:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3588, Unknown=0, NotChecked=0, Total=3782 [2024-11-16 02:50:40,077 INFO L87 Difference]: Start difference. First operand 234 states and 246 transitions. Second operand has 62 states, 62 states have (on average 3.0806451612903225) internal successors, (191), 62 states have internal predecessors, (191), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:50:41,659 INFO L93 Difference]: Finished difference Result 340 states and 352 transitions. [2024-11-16 02:50:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-16 02:50:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0806451612903225) internal successors, (191), 62 states have internal predecessors, (191), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2024-11-16 02:50:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:50:41,661 INFO L225 Difference]: With dead ends: 340 [2024-11-16 02:50:41,661 INFO L226 Difference]: Without dead ends: 337 [2024-11-16 02:50:41,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=334, Invalid=5216, Unknown=0, NotChecked=0, Total=5550 [2024-11-16 02:50:41,662 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 131 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-16 02:50:41,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 2605 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-16 02:50:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-16 02:50:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 190. [2024-11-16 02:50:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.053763440860215) internal successors, (196), 186 states have internal predecessors, (196), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:50:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 200 transitions. [2024-11-16 02:50:41,847 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 200 transitions. Word has length 83 [2024-11-16 02:50:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:50:41,847 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 200 transitions. [2024-11-16 02:50:41,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0806451612903225) internal successors, (191), 62 states have internal predecessors, (191), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:50:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 200 transitions. [2024-11-16 02:50:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-16 02:50:41,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:50:41,848 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:50:41,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-16 02:50:42,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-16 02:50:42,049 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:50:42,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:50:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -704034839, now seen corresponding path program 25 times [2024-11-16 02:50:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:50:42,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30554806] [2024-11-16 02:50:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:50:42,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:50:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:43,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:50:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:43,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:50:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:50:43,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:50:43,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30554806] [2024-11-16 02:50:43,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30554806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:50:43,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713169117] [2024-11-16 02:50:43,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:50:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:50:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:50:43,248 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:50:43,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-16 02:50:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:50:43,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-16 02:50:43,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:50:43,531 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 32 treesize of output 21 [2024-11-16 02:50:43,574 INFO L349 Elim1Store]: treesize reduction 28, result has 30.0 percent of original size [2024-11-16 02:50:43,575 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 58 treesize of output 46 [2024-11-16 02:50:43,627 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-16 02:50:43,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 74 [2024-11-16 02:50:43,702 INFO L349 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2024-11-16 02:50:43,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 106 [2024-11-16 02:50:43,802 INFO L349 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2024-11-16 02:50:43,802 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 8 case distinctions, treesize of input 133 treesize of output 138 [2024-11-16 02:50:43,938 INFO L349 Elim1Store]: treesize reduction 69, result has 41.5 percent of original size [2024-11-16 02:50:43,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 161 treesize of output 173 [2024-11-16 02:50:44,089 INFO L349 Elim1Store]: treesize reduction 81, result has 31.4 percent of original size [2024-11-16 02:50:44,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 163 treesize of output 166