./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:10:39,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:10:39,675 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:10:39,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:10:39,683 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:10:39,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:10:39,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:10:39,721 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:10:39,721 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:10:39,723 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:10:39,724 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:10:39,724 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:10:39,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:10:39,726 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:10:39,727 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:10:39,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:10:39,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:10:39,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:10:39,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:10:39,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:10:39,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:10:39,731 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:10:39,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:10:39,732 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:10:39,732 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:10:39,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:10:39,733 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:10:39,733 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:10:39,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:10:39,734 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:10:39,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:10:39,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:10:39,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:10:39,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:10:39,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:10:39,735 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:10:39,736 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:10:39,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:10:39,737 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:10:39,737 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:10:39,737 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:10:39,738 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:10:39,738 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2024-10-10 22:10:40,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:10:40,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:10:40,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:10:40,046 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:10:40,047 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:10:40,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-10-10 22:10:41,541 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:10:41,744 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:10:41,745 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-10-10 22:10:41,760 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/172fc79e5/e6c09350cea242b5b4376413834dfcba/FLAG3c3ebe237 [2024-10-10 22:10:42,121 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/172fc79e5/e6c09350cea242b5b4376413834dfcba [2024-10-10 22:10:42,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:10:42,126 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:10:42,127 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:10:42,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:10:42,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:10:42,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13715a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42, skipping insertion in model container [2024-10-10 22:10:42,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,160 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:10:42,346 WARN L248 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-multidimensional/copy-partial-2-n-u.c[416,429] [2024-10-10 22:10:42,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:10:42,377 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:10:42,386 WARN L248 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-multidimensional/copy-partial-2-n-u.c[416,429] [2024-10-10 22:10:42,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:10:42,410 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:10:42,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42 WrapperNode [2024-10-10 22:10:42,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:10:42,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:10:42,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:10:42,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:10:42,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,449 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-10-10 22:10:42,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:10:42,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:10:42,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:10:42,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:10:42,461 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,463 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,479 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 2, 3]. 43 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, 1, 1]. [2024-10-10 22:10:42,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,480 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,489 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,492 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:10:42,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:10:42,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:10:42,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:10:42,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (1/1) ... [2024-10-10 22:10:42,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:10:42,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:10:42,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:10:42,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:10:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:10:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-10 22:10:42,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-10 22:10:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:10:42,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:10:42,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:10:42,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:10:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:10:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:10:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:10:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:10:42,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:10:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:10:42,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:10:42,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:10:42,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:10:42,655 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:10:42,657 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:10:42,825 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-10-10 22:10:42,826 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:10:42,851 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:10:42,851 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-10 22:10:42,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:10:42 BoogieIcfgContainer [2024-10-10 22:10:42,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:10:42,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:10:42,855 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:10:42,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:10:42,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:10:42" (1/3) ... [2024-10-10 22:10:42,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c978b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:10:42, skipping insertion in model container [2024-10-10 22:10:42,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:10:42" (2/3) ... [2024-10-10 22:10:42,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c978b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:10:42, skipping insertion in model container [2024-10-10 22:10:42,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:10:42" (3/3) ... [2024-10-10 22:10:42,861 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2024-10-10 22:10:42,876 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:10:42,877 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:10:42,931 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:10:42,938 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;@18e2e786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:10:42,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:10:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 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) [2024-10-10 22:10:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-10 22:10:42,954 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:42,955 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:42,955 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:42,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:42,963 INFO L85 PathProgramCache]: Analyzing trace with hash -863536884, now seen corresponding path program 1 times [2024-10-10 22:10:42,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:42,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078865731] [2024-10-10 22:10:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:42,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:10:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078865731] [2024-10-10 22:10:43,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078865731] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:10:43,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:10:43,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:10:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387556947] [2024-10-10 22:10:43,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:10:43,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:10:43,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:10:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:10:43,231 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 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) [2024-10-10 22:10:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:43,256 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2024-10-10 22:10:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:10:43,259 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 [2024-10-10 22:10:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:43,266 INFO L225 Difference]: With dead ends: 48 [2024-10-10 22:10:43,266 INFO L226 Difference]: Without dead ends: 23 [2024-10-10 22:10:43,270 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 [2024-10-10 22:10:43,277 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:43,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:10:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-10 22:10:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-10 22:10:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2024-10-10 22:10:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-10-10 22:10:43,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 20 [2024-10-10 22:10:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:43,314 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-10-10 22:10:43,315 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) [2024-10-10 22:10:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-10-10 22:10:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-10 22:10:43,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:43,316 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:43,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:10:43,317 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:43,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2101247948, now seen corresponding path program 1 times [2024-10-10 22:10:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:43,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808813185] [2024-10-10 22:10:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:10:43,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808813185] [2024-10-10 22:10:43,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808813185] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:10:43,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:10:43,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:10:43,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863099427] [2024-10-10 22:10:43,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:10:43,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:10:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:43,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:10:43,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:43,552 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-10-10 22:10:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:43,606 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-10-10 22:10:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:10:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 20 [2024-10-10 22:10:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:43,608 INFO L225 Difference]: With dead ends: 38 [2024-10-10 22:10:43,608 INFO L226 Difference]: Without dead ends: 26 [2024-10-10 22:10:43,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:43,610 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:43,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:10:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-10 22:10:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-10-10 22:10:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) 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) [2024-10-10 22:10:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-10 22:10:43,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 20 [2024-10-10 22:10:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:43,619 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-10 22:10:43,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-10-10 22:10:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-10 22:10:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-10 22:10:43,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:43,620 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:43,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:10:43,621 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:43,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1303690610, now seen corresponding path program 1 times [2024-10-10 22:10:43,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:43,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883813537] [2024-10-10 22:10:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:10:43,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:43,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883813537] [2024-10-10 22:10:43,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883813537] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:10:43,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:10:43,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:10:43,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571766477] [2024-10-10 22:10:43,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:10:43,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:10:43,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:10:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:43,801 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-10 22:10:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:43,849 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-10-10 22:10:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:10:43,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 23 [2024-10-10 22:10:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:43,852 INFO L225 Difference]: With dead ends: 46 [2024-10-10 22:10:43,852 INFO L226 Difference]: Without dead ends: 31 [2024-10-10 22:10:43,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:43,853 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:43,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:10:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-10 22:10:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-10-10 22:10:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2024-10-10 22:10:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-10 22:10:43,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2024-10-10 22:10:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:43,866 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-10 22:10:43,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-10 22:10:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-10 22:10:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-10 22:10:43,868 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:43,868 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:43,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-10 22:10:43,868 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:43,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1074082683, now seen corresponding path program 1 times [2024-10-10 22:10:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:43,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166879957] [2024-10-10 22:10:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:43,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:43,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166879957] [2024-10-10 22:10:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166879957] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:10:43,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:10:43,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:10:43,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264100576] [2024-10-10 22:10:43,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:10:43,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:10:43,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:10:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:44,001 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-10-10 22:10:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:44,069 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-10-10 22:10:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:10:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 24 [2024-10-10 22:10:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:44,072 INFO L225 Difference]: With dead ends: 46 [2024-10-10 22:10:44,072 INFO L226 Difference]: Without dead ends: 38 [2024-10-10 22:10:44,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:44,075 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:44,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:10:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-10 22:10:44,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2024-10-10 22:10:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2024-10-10 22:10:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-10-10 22:10:44,085 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 24 [2024-10-10 22:10:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:44,085 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-10-10 22:10:44,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-10-10 22:10:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-10-10 22:10:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:10:44,087 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:44,087 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:44,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-10 22:10:44,087 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:44,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1191025207, now seen corresponding path program 1 times [2024-10-10 22:10:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:44,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891565280] [2024-10-10 22:10:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:44,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:44,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:44,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891565280] [2024-10-10 22:10:44,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891565280] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:10:44,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:10:44,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:10:44,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390281304] [2024-10-10 22:10:44,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:10:44,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:10:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:10:44,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:44,191 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2024-10-10 22:10:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:44,231 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-10-10 22:10:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:10:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 27 [2024-10-10 22:10:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:44,232 INFO L225 Difference]: With dead ends: 43 [2024-10-10 22:10:44,232 INFO L226 Difference]: Without dead ends: 32 [2024-10-10 22:10:44,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:10:44,233 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:44,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 38 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:10:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-10 22:10:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-10-10 22:10:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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) [2024-10-10 22:10:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-10-10 22:10:44,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 27 [2024-10-10 22:10:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:44,250 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-10-10 22:10:44,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2024-10-10 22:10:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-10-10 22:10:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 22:10:44,253 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:44,253 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:44,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-10 22:10:44,253 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:44,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1250290794, now seen corresponding path program 1 times [2024-10-10 22:10:44,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:44,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332740934] [2024-10-10 22:10:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:44,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:44,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:44,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332740934] [2024-10-10 22:10:44,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332740934] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:10:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850326120] [2024-10-10 22:10:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:44,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:44,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:10:44,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:10:44,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:10:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:44,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:10:44,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:10:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:44,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:10:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:44,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850326120] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:10:44,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:10:44,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-10 22:10:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995229973] [2024-10-10 22:10:44,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:10:44,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-10 22:10:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-10 22:10:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:10:44,612 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:44,726 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2024-10-10 22:10:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 22:10:44,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-10-10 22:10:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:44,728 INFO L225 Difference]: With dead ends: 72 [2024-10-10 22:10:44,729 INFO L226 Difference]: Without dead ends: 53 [2024-10-10 22:10:44,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-10-10 22:10:44,731 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:44,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 67 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:10:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-10 22:10:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2024-10-10 22:10:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2024-10-10 22:10:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-10-10 22:10:44,746 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 28 [2024-10-10 22:10:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:44,747 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-10-10 22:10:44,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-10-10 22:10:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-10 22:10:44,748 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:44,748 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:44,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-10 22:10:44,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:44,949 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:44,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash -328450783, now seen corresponding path program 2 times [2024-10-10 22:10:44,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:44,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848243308] [2024-10-10 22:10:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:45,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:45,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:45,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848243308] [2024-10-10 22:10:45,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848243308] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:10:45,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574386733] [2024-10-10 22:10:45,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:10:45,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:45,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:10:45,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:10:45,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:10:45,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:10:45,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:10:45,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-10 22:10:45,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:10:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:45,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:10:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:45,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574386733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:10:45,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:10:45,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-10 22:10:45,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590559273] [2024-10-10 22:10:45,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:10:45,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-10 22:10:45,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:45,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-10 22:10:45,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-10-10 22:10:45,433 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:45,653 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2024-10-10 22:10:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-10 22:10:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-10-10 22:10:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:45,655 INFO L225 Difference]: With dead ends: 117 [2024-10-10 22:10:45,655 INFO L226 Difference]: Without dead ends: 95 [2024-10-10 22:10:45,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-10-10 22:10:45,656 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:45,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 132 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:10:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-10 22:10:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 37. [2024-10-10 22:10:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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) [2024-10-10 22:10:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-10 22:10:45,667 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2024-10-10 22:10:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:45,667 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-10 22:10:45,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-10 22:10:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:10:45,668 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:45,671 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:45,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 22:10:45,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:45,872 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:45,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1039517825, now seen corresponding path program 3 times [2024-10-10 22:10:45,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:45,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645751740] [2024-10-10 22:10:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:45,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:46,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:46,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:10:46,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645751740] [2024-10-10 22:10:46,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645751740] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:10:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515763325] [2024-10-10 22:10:46,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:10:46,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:10:46,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:10:46,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:10:46,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 22:10:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:10:46,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:10:46,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:10:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-10 22:10:46,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:10:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-10 22:10:46,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515763325] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:10:46,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:10:46,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2024-10-10 22:10:46,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562334590] [2024-10-10 22:10:46,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:10:46,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-10 22:10:46,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-10 22:10:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:10:46,479 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:10:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:47,984 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2024-10-10 22:10:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-10 22:10:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-10-10 22:10:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:47,987 INFO L225 Difference]: With dead ends: 172 [2024-10-10 22:10:47,987 INFO L226 Difference]: Without dead ends: 144 [2024-10-10 22:10:47,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1913, Invalid=4249, Unknown=0, NotChecked=0, Total=6162 [2024-10-10 22:10:47,990 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 292 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:47,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 138 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:10:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-10 22:10:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 80. [2024-10-10 22:10:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 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) [2024-10-10 22:10:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-10-10 22:10:48,016 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 37 [2024-10-10 22:10:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:48,017 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-10-10 22:10:48,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:10:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-10-10 22:10:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-10 22:10:48,021 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:48,021 INFO L215 NwaCegarLoop]: trace histogram [44, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:48,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 22:10:48,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:48,226 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:48,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash -226571017, now seen corresponding path program 4 times [2024-10-10 22:10:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:48,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547410030] [2024-10-10 22:10:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:48,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:48,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 436 proven. 66 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-10-10 22:10:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547410030] [2024-10-10 22:10:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547410030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:10:48,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917454193] [2024-10-10 22:10:48,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:10:48,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:10:48,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:10:48,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:10:48,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:10:48,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:10:48,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:10:48,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:10:48,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-10 22:10:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2024-10-10 22:10:48,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:10:49,087 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-10-10 22:10:49,087 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 36 treesize of output 27 [2024-10-10 22:10:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2024-10-10 22:10:49,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917454193] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:10:49,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:10:49,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 23 [2024-10-10 22:10:49,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948700663] [2024-10-10 22:10:49,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:10:49,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 22:10:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 22:10:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:10:49,150 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:50,866 INFO L93 Difference]: Finished difference Result 292 states and 359 transitions. [2024-10-10 22:10:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-10-10 22:10:50,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2024-10-10 22:10:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:50,869 INFO L225 Difference]: With dead ends: 292 [2024-10-10 22:10:50,869 INFO L226 Difference]: Without dead ends: 233 [2024-10-10 22:10:50,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1876, Invalid=5434, Unknown=0, NotChecked=0, Total=7310 [2024-10-10 22:10:50,874 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 630 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:50,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 175 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:10:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-10-10 22:10:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 87. [2024-10-10 22:10:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 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) [2024-10-10 22:10:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-10-10 22:10:50,901 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 80 [2024-10-10 22:10:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:50,902 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-10-10 22:10:50,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-10-10 22:10:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-10 22:10:50,905 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:50,905 INFO L215 NwaCegarLoop]: trace histogram [48, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:50,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:10:51,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-10 22:10:51,110 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:51,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1852789383, now seen corresponding path program 1 times [2024-10-10 22:10:51,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:51,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354452632] [2024-10-10 22:10:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:51,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:51,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:51,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2024-10-10 22:10:51,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:51,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354452632] [2024-10-10 22:10:51,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354452632] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:10:51,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444511698] [2024-10-10 22:10:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:51,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:51,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:10:51,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:10:51,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:10:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:51,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-10 22:10:51,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:10:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2024-10-10 22:10:52,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:10:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2024-10-10 22:10:52,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444511698] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:10:52,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:10:52,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-10-10 22:10:52,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593610869] [2024-10-10 22:10:52,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:10:52,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-10 22:10:52,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-10 22:10:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2024-10-10 22:10:52,405 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:53,053 INFO L93 Difference]: Finished difference Result 362 states and 484 transitions. [2024-10-10 22:10:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-10 22:10:53,053 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 87 [2024-10-10 22:10:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:53,055 INFO L225 Difference]: With dead ends: 362 [2024-10-10 22:10:53,055 INFO L226 Difference]: Without dead ends: 297 [2024-10-10 22:10:53,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1190, Invalid=1890, Unknown=0, NotChecked=0, Total=3080 [2024-10-10 22:10:53,057 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 533 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:53,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 199 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:10:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-10 22:10:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 143. [2024-10-10 22:10:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 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) [2024-10-10 22:10:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2024-10-10 22:10:53,086 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 87 [2024-10-10 22:10:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:53,086 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2024-10-10 22:10:53,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2024-10-10 22:10:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-10 22:10:53,088 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:53,088 INFO L215 NwaCegarLoop]: trace histogram [104, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:53,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-10 22:10:53,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:10:53,293 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:53,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:53,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1966440569, now seen corresponding path program 2 times [2024-10-10 22:10:53,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:53,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215700123] [2024-10-10 22:10:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:54,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:10:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:54,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:10:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:10:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5802 backedges. 2191 proven. 351 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2024-10-10 22:10:54,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:10:54,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215700123] [2024-10-10 22:10:54,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215700123] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:10:54,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903014300] [2024-10-10 22:10:54,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:10:54,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:10:54,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:10:54,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:10:54,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:10:55,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:10:55,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:10:55,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-10 22:10:55,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:10:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5802 backedges. 2191 proven. 351 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2024-10-10 22:10:55,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:10:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5802 backedges. 2191 proven. 351 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2024-10-10 22:10:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903014300] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:10:56,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:10:56,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2024-10-10 22:10:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627820629] [2024-10-10 22:10:56,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:10:56,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-10-10 22:10:56,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:10:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-10-10 22:10:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3139, Invalid=4001, Unknown=0, NotChecked=0, Total=7140 [2024-10-10 22:10:56,697 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 85 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 85 states have internal predecessors, (109), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:10:58,454 INFO L93 Difference]: Finished difference Result 684 states and 918 transitions. [2024-10-10 22:10:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-10 22:10:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 85 states have internal predecessors, (109), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 143 [2024-10-10 22:10:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:10:58,457 INFO L225 Difference]: With dead ends: 684 [2024-10-10 22:10:58,457 INFO L226 Difference]: Without dead ends: 577 [2024-10-10 22:10:58,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4732, Invalid=7700, Unknown=0, NotChecked=0, Total=12432 [2024-10-10 22:10:58,461 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1538 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:10:58,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1538 Valid, 319 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:10:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-10-10 22:10:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 255. [2024-10-10 22:10:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.0358565737051793) internal successors, (260), 251 states have internal predecessors, (260), 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) [2024-10-10 22:10:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 264 transitions. [2024-10-10 22:10:58,507 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 264 transitions. Word has length 143 [2024-10-10 22:10:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:10:58,508 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 264 transitions. [2024-10-10 22:10:58,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 85 states have internal predecessors, (109), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:10:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 264 transitions. [2024-10-10 22:10:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2024-10-10 22:10:58,510 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:10:58,510 INFO L215 NwaCegarLoop]: trace histogram [216, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:10:58,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-10 22:10:58,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 22:10:58,711 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:10:58,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:10:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2135390599, now seen corresponding path program 3 times [2024-10-10 22:10:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:10:58,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984145067] [2024-10-10 22:10:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:10:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:10:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:03,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:11:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:03,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:11:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24114 backedges. 9079 proven. 1485 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2024-10-10 22:11:03,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:11:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984145067] [2024-10-10 22:11:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984145067] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:11:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939565062] [2024-10-10 22:11:03,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:11:03,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:11:03,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:11:03,144 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:11:03,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:11:03,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 22:11:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:11:03,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:11:03,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:11:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24113 trivial. 0 not checked. [2024-10-10 22:11:03,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:11:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24113 trivial. 0 not checked. [2024-10-10 22:11:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939565062] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:11:04,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:11:04,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 5, 5] total 64 [2024-10-10 22:11:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224222184] [2024-10-10 22:11:04,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:11:04,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-10 22:11:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:11:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-10 22:11:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1622, Invalid=2410, Unknown=0, NotChecked=0, Total=4032 [2024-10-10 22:11:04,145 INFO L87 Difference]: Start difference. First operand 255 states and 264 transitions. Second operand has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:11:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:11:23,202 INFO L93 Difference]: Finished difference Result 1851 states and 2314 transitions. [2024-10-10 22:11:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2024-10-10 22:11:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 255 [2024-10-10 22:11:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:11:23,210 INFO L225 Difference]: With dead ends: 1851 [2024-10-10 22:11:23,210 INFO L226 Difference]: Without dead ends: 1660 [2024-10-10 22:11:23,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39340 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=34942, Invalid=83050, Unknown=0, NotChecked=0, Total=117992 [2024-10-10 22:11:23,223 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10598 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10598 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:11:23,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10598 Valid, 232 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-10 22:11:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2024-10-10 22:11:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 271. [2024-10-10 22:11:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 267 states have (on average 1.0449438202247192) internal successors, (279), 267 states have internal predecessors, (279), 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) [2024-10-10 22:11:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 283 transitions. [2024-10-10 22:11:23,284 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 283 transitions. Word has length 255 [2024-10-10 22:11:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:11:23,285 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 283 transitions. [2024-10-10 22:11:23,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:11:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 283 transitions. [2024-10-10 22:11:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-10-10 22:11:23,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:11:23,289 INFO L215 NwaCegarLoop]: trace histogram [220, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:11:23,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-10 22:11:23,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:11:23,490 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:11:23,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:11:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1769418320, now seen corresponding path program 4 times [2024-10-10 22:11:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:11:23,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577248451] [2024-10-10 22:11:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:11:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:11:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:27,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:11:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:27,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:11:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25042 backedges. 9412 proven. 1540 refuted. 0 times theorem prover too weak. 14090 trivial. 0 not checked. [2024-10-10 22:11:27,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:11:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577248451] [2024-10-10 22:11:27,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577248451] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:11:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882674416] [2024-10-10 22:11:27,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:11:27,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:11:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:11:27,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:11:27,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:11:27,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:11:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:11:27,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:11:27,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:11:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25042 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 25020 trivial. 0 not checked. [2024-10-10 22:11:27,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:11:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25042 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 25020 trivial. 0 not checked. [2024-10-10 22:11:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882674416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:11:27,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:11:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 7, 7] total 66 [2024-10-10 22:11:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945537615] [2024-10-10 22:11:27,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:11:27,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-10 22:11:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:11:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-10 22:11:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1680, Invalid=2610, Unknown=0, NotChecked=0, Total=4290 [2024-10-10 22:11:27,887 INFO L87 Difference]: Start difference. First operand 271 states and 283 transitions. Second operand has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:11:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:11:31,491 INFO L93 Difference]: Finished difference Result 1006 states and 1312 transitions. [2024-10-10 22:11:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-10 22:11:31,491 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 271 [2024-10-10 22:11:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:11:31,497 INFO L225 Difference]: With dead ends: 1006 [2024-10-10 22:11:31,497 INFO L226 Difference]: Without dead ends: 800 [2024-10-10 22:11:31,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 593 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5170, Invalid=10082, Unknown=0, NotChecked=0, Total=15252 [2024-10-10 22:11:31,500 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1329 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:11:31,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 356 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:11:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2024-10-10 22:11:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 306. [2024-10-10 22:11:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 302 states have (on average 1.0662251655629138) internal successors, (322), 302 states have internal predecessors, (322), 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) [2024-10-10 22:11:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 326 transitions. [2024-10-10 22:11:31,637 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 326 transitions. Word has length 271 [2024-10-10 22:11:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:11:31,638 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 326 transitions. [2024-10-10 22:11:31,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:11:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 326 transitions. [2024-10-10 22:11:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2024-10-10 22:11:31,643 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:11:31,643 INFO L215 NwaCegarLoop]: trace histogram [224, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:11:31,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-10 22:11:31,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-10 22:11:31,844 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:11:31,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:11:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2044755355, now seen corresponding path program 1 times [2024-10-10 22:11:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:11:31,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059609109] [2024-10-10 22:11:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:11:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:11:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:35,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:11:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:35,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:11:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25947 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 14600 trivial. 0 not checked. [2024-10-10 22:11:35,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:11:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059609109] [2024-10-10 22:11:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059609109] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:11:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86928539] [2024-10-10 22:11:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:11:35,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:11:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:11:35,557 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:11:35,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:11:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:11:36,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-10 22:11:36,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:11:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25947 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 14600 trivial. 0 not checked. [2024-10-10 22:11:37,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:11:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25947 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 14600 trivial. 0 not checked. [2024-10-10 22:11:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86928539] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:11:41,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:11:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 175 [2024-10-10 22:11:41,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783238901] [2024-10-10 22:11:41,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:11:41,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2024-10-10 22:11:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:11:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2024-10-10 22:11:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13459, Invalid=16991, Unknown=0, NotChecked=0, Total=30450 [2024-10-10 22:11:41,531 INFO L87 Difference]: Start difference. First operand 306 states and 326 transitions. Second operand has 175 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 175 states have internal predecessors, (201), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:11:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:11:51,954 INFO L93 Difference]: Finished difference Result 1792 states and 2621 transitions. [2024-10-10 22:11:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-10-10 22:11:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 175 states have internal predecessors, (201), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 278 [2024-10-10 22:11:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:11:51,961 INFO L225 Difference]: With dead ends: 1792 [2024-10-10 22:11:51,961 INFO L226 Difference]: Without dead ends: 1552 [2024-10-10 22:11:51,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19605 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=20242, Invalid=33350, Unknown=0, NotChecked=0, Total=53592 [2024-10-10 22:11:51,965 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2801 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2801 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:11:51,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2801 Valid, 532 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-10 22:11:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2024-10-10 22:11:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 538. [2024-10-10 22:11:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 534 states have (on average 1.0374531835205993) internal successors, (554), 534 states have internal predecessors, (554), 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) [2024-10-10 22:11:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 558 transitions. [2024-10-10 22:11:52,099 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 558 transitions. Word has length 278 [2024-10-10 22:11:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:11:52,100 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 558 transitions. [2024-10-10 22:11:52,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 175 states have internal predecessors, (201), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 22:11:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 558 transitions. [2024-10-10 22:11:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2024-10-10 22:11:52,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:11:52,108 INFO L215 NwaCegarLoop]: trace histogram [456, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:11:52,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 22:11:52,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:11:52,308 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:11:52,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:11:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash 362258789, now seen corresponding path program 2 times [2024-10-10 22:11:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:11:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579193440] [2024-10-10 22:11:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:11:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:11:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat