./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.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/verifythis/tree_max.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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 03:11:38,032 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 03:11:38,084 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 03:11:38,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 03:11:38,089 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 03:11:38,116 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 03:11:38,117 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 03:11:38,117 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 03:11:38,118 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 03:11:38,121 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 03:11:38,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 03:11:38,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 03:11:38,121 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 03:11:38,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 03:11:38,122 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 03:11:38,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 03:11:38,122 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 03:11:38,122 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 03:11:38,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 03:11:38,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 03:11:38,123 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 03:11:38,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 03:11:38,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 03:11:38,127 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 03:11:38,128 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 03:11:38,128 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 03:11:38,128 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 03:11:38,128 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 03:11:38,128 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 03:11:38,129 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 03:11:38,129 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 03:11:38,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 03:11:38,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:11:38,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 03:11:38,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 03:11:38,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 03:11:38,130 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 03:11:38,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 03:11:38,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 03:11:38,130 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 03:11:38,130 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 03:11:38,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 03:11:38,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2024-10-11 03:11:38,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 03:11:38,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 03:11:38,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 03:11:38,386 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 03:11:38,386 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 03:11:38,387 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2024-10-11 03:11:39,837 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 03:11:40,041 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 03:11:40,042 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2024-10-11 03:11:40,058 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e3749e727/066d2b6c1749489f844e2803849da3e2/FLAG8291a8d12 [2024-10-11 03:11:40,405 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e3749e727/066d2b6c1749489f844e2803849da3e2 [2024-10-11 03:11:40,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 03:11:40,409 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 03:11:40,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 03:11:40,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 03:11:40,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 03:11:40,415 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86e8d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40, skipping insertion in model container [2024-10-11 03:11:40,416 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,432 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 03:11:40,604 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/verifythis/tree_max.c[544,557] [2024-10-11 03:11:40,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:11:40,624 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 03:11:40,636 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/verifythis/tree_max.c[544,557] [2024-10-11 03:11:40,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:11:40,669 INFO L204 MainTranslator]: Completed translation [2024-10-11 03:11:40,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40 WrapperNode [2024-10-11 03:11:40,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 03:11:40,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 03:11:40,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 03:11:40,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 03:11:40,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,692 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2024-10-11 03:11:40,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 03:11:40,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 03:11:40,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 03:11:40,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 03:11:40,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,706 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,717 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-11 03:11:40,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,723 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,724 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,725 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,727 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 03:11:40,727 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 03:11:40,727 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 03:11:40,727 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 03:11:40,728 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (1/1) ... [2024-10-11 03:11:40,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:11:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:40,754 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) [2024-10-11 03:11:40,763 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 [2024-10-11 03:11:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 03:11:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-11 03:11:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 03:11:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-10-11 03:11:40,798 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-10-11 03:11:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2024-10-11 03:11:40,798 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2024-10-11 03:11:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 03:11:40,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 03:11:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-10-11 03:11:40,800 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-10-11 03:11:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 03:11:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-11 03:11:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 03:11:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 03:11:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 03:11:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 03:11:40,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 03:11:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 03:11:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 03:11:40,883 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 03:11:40,885 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 03:11:41,051 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-10-11 03:11:41,051 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 03:11:41,065 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 03:11:41,066 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-11 03:11:41,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:11:41 BoogieIcfgContainer [2024-10-11 03:11:41,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 03:11:41,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 03:11:41,071 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 03:11:41,074 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 03:11:41,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 03:11:40" (1/3) ... [2024-10-11 03:11:41,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723e3e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:11:41, skipping insertion in model container [2024-10-11 03:11:41,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:11:40" (2/3) ... [2024-10-11 03:11:41,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723e3e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:11:41, skipping insertion in model container [2024-10-11 03:11:41,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:11:41" (3/3) ... [2024-10-11 03:11:41,079 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2024-10-11 03:11:41,104 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 03:11:41,104 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 03:11:41,157 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 03:11:41,162 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;@d039c31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 03:11:41,163 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 03:11:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-11 03:11:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 03:11:41,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:41,171 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:41,172 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:41,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash 46899722, now seen corresponding path program 1 times [2024-10-11 03:11:41,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:41,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802329216] [2024-10-11 03:11:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:41,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:11:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:41,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:11:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:11:41,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:41,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802329216] [2024-10-11 03:11:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802329216] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:11:41,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:11:41,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 03:11:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358638617] [2024-10-11 03:11:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:11:41,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:11:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:41,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:11:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 03:11:41,625 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:11:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:41,872 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2024-10-11 03:11:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 03:11:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-11 03:11:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:41,883 INFO L225 Difference]: With dead ends: 65 [2024-10-11 03:11:41,883 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 03:11:41,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:11:41,892 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:41,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 84 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:11:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 03:11:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-11 03:11:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-11 03:11:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-10-11 03:11:41,966 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2024-10-11 03:11:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:41,966 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-10-11 03:11:41,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:11:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-10-11 03:11:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 03:11:41,969 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:41,970 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:41,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 03:11:41,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:41,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash 678604871, now seen corresponding path program 1 times [2024-10-11 03:11:41,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:41,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745057089] [2024-10-11 03:11:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:41,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:11:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 03:11:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 03:11:42,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:42,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745057089] [2024-10-11 03:11:42,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745057089] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:11:42,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:11:42,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 03:11:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405616445] [2024-10-11 03:11:42,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:11:42,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 03:11:42,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 03:11:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 03:11:42,252 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 03:11:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:42,410 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2024-10-11 03:11:42,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 03:11:42,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-10-11 03:11:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:42,411 INFO L225 Difference]: With dead ends: 48 [2024-10-11 03:11:42,411 INFO L226 Difference]: Without dead ends: 37 [2024-10-11 03:11:42,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:11:42,413 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:42,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 03:11:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-11 03:11:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-11 03:11:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-11 03:11:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2024-10-11 03:11:42,419 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 30 [2024-10-11 03:11:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:42,420 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2024-10-11 03:11:42,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 03:11:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2024-10-11 03:11:42,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 03:11:42,421 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:42,421 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:42,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 03:11:42,422 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:42,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1585903113, now seen corresponding path program 1 times [2024-10-11 03:11:42,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:42,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000074265] [2024-10-11 03:11:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:11:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:42,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 03:11:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:43,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:43,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 03:11:43,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000074265] [2024-10-11 03:11:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000074265] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655339831] [2024-10-11 03:11:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:43,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:43,071 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) [2024-10-11 03:11:43,074 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 [2024-10-11 03:11:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:43,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-11 03:11:43,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:43,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 03:11:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 03:11:43,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:43,766 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-10-11 03:11:43,767 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 13 treesize of output 13 [2024-10-11 03:11:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 03:11:43,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655339831] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:11:43,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 03:11:43,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2024-10-11 03:11:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009285139] [2024-10-11 03:11:43,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:43,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 03:11:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 03:11:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-10-11 03:11:43,802 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-11 03:11:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:44,419 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-10-11 03:11:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 03:11:44,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 43 [2024-10-11 03:11:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:44,421 INFO L225 Difference]: With dead ends: 46 [2024-10-11 03:11:44,422 INFO L226 Difference]: Without dead ends: 44 [2024-10-11 03:11:44,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-10-11 03:11:44,423 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:44,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 126 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:11:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-11 03:11:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2024-10-11 03:11:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-11 03:11:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-10-11 03:11:44,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 43 [2024-10-11 03:11:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:44,441 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-10-11 03:11:44,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-11 03:11:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-10-11 03:11:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-11 03:11:44,446 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:44,446 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:44,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 03:11:44,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:44,648 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:44,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -256968945, now seen corresponding path program 1 times [2024-10-11 03:11:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:44,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551930636] [2024-10-11 03:11:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:11:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 03:11:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-11 03:11:45,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:45,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551930636] [2024-10-11 03:11:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551930636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:45,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022979869] [2024-10-11 03:11:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:45,388 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) [2024-10-11 03:11:45,389 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 [2024-10-11 03:11:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:45,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-11 03:11:45,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:45,560 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 13 treesize of output 9 [2024-10-11 03:11:45,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 03:11:45,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-11 03:11:45,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-11 03:11:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 03:11:45,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 03:11:46,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022979869] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:11:46,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 03:11:46,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 14] total 30 [2024-10-11 03:11:46,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358883910] [2024-10-11 03:11:46,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:46,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 03:11:46,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 03:11:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-10-11 03:11:46,377 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-10-11 03:11:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:47,711 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2024-10-11 03:11:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 03:11:47,712 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) Word has length 49 [2024-10-11 03:11:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:47,714 INFO L225 Difference]: With dead ends: 113 [2024-10-11 03:11:47,714 INFO L226 Difference]: Without dead ends: 99 [2024-10-11 03:11:47,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=305, Invalid=2665, Unknown=0, NotChecked=0, Total=2970 [2024-10-11 03:11:47,716 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 242 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:47,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 276 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 03:11:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-11 03:11:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2024-10-11 03:11:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 62 states have internal predecessors, (73), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (35), 16 states have call predecessors, (35), 13 states have call successors, (35) [2024-10-11 03:11:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 125 transitions. [2024-10-11 03:11:47,733 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 125 transitions. Word has length 49 [2024-10-11 03:11:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:47,733 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 125 transitions. [2024-10-11 03:11:47,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-10-11 03:11:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 125 transitions. [2024-10-11 03:11:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-11 03:11:47,739 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:47,739 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:47,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 03:11:47,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:47,940 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:47,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash -140605299, now seen corresponding path program 1 times [2024-10-11 03:11:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756229752] [2024-10-11 03:11:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:11:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 03:11:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 03:11:48,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756229752] [2024-10-11 03:11:48,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756229752] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58887397] [2024-10-11 03:11:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:48,411 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) [2024-10-11 03:11:48,412 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 [2024-10-11 03:11:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:48,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-11 03:11:48,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:48,536 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 13 treesize of output 9 [2024-10-11 03:11:48,540 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 13 treesize of output 9 [2024-10-11 03:11:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 03:11:48,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 03:11:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58887397] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:11:48,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 03:11:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 21 [2024-10-11 03:11:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667577998] [2024-10-11 03:11:48,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:48,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 03:11:48,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 03:11:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-10-11 03:11:48,987 INFO L87 Difference]: Start difference. First operand 87 states and 125 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-11 03:11:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:49,673 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2024-10-11 03:11:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 03:11:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 49 [2024-10-11 03:11:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:49,676 INFO L225 Difference]: With dead ends: 149 [2024-10-11 03:11:49,676 INFO L226 Difference]: Without dead ends: 106 [2024-10-11 03:11:49,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-10-11 03:11:49,678 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:49,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 145 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 03:11:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-11 03:11:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2024-10-11 03:11:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 17 states have call successors, (17), 8 states have call predecessors, (17), 11 states have return successors, (35), 18 states have call predecessors, (35), 12 states have call successors, (35) [2024-10-11 03:11:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 131 transitions. [2024-10-11 03:11:49,693 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 131 transitions. Word has length 49 [2024-10-11 03:11:49,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:49,694 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 131 transitions. [2024-10-11 03:11:49,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-11 03:11:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 131 transitions. [2024-10-11 03:11:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 03:11:49,695 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:49,695 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-11 03:11:49,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 03:11:49,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:49,900 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:49,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1138374282, now seen corresponding path program 2 times [2024-10-11 03:11:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:49,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251866490] [2024-10-11 03:11:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:49,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:11:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 03:11:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 03:11:50,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251866490] [2024-10-11 03:11:50,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251866490] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960583657] [2024-10-11 03:11:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:11:50,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:50,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:50,807 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) [2024-10-11 03:11:50,809 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 [2024-10-11 03:11:50,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:11:50,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:11:50,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-11 03:11:50,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:50,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:11:50,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:11:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 03:11:51,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-11 03:11:51,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960583657] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:11:51,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 03:11:51,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 38 [2024-10-11 03:11:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615526192] [2024-10-11 03:11:51,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:51,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-11 03:11:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-11 03:11:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 03:11:51,852 INFO L87 Difference]: Start difference. First operand 94 states and 131 transitions. Second operand has 38 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 13 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2024-10-11 03:11:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:52,912 INFO L93 Difference]: Finished difference Result 160 states and 226 transitions. [2024-10-11 03:11:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 03:11:52,913 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 13 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2024-10-11 03:11:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:52,915 INFO L225 Difference]: With dead ends: 160 [2024-10-11 03:11:52,916 INFO L226 Difference]: Without dead ends: 141 [2024-10-11 03:11:52,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=2519, Unknown=0, NotChecked=0, Total=2756 [2024-10-11 03:11:52,918 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:52,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 378 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 03:11:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-11 03:11:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2024-10-11 03:11:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 80 states have (on average 1.25) internal successors, (100), 83 states have internal predecessors, (100), 19 states have call successors, (19), 10 states have call predecessors, (19), 15 states have return successors, (50), 21 states have call predecessors, (50), 14 states have call successors, (50) [2024-10-11 03:11:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions. [2024-10-11 03:11:52,948 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 61 [2024-10-11 03:11:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:52,948 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions. [2024-10-11 03:11:52,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 13 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2024-10-11 03:11:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions. [2024-10-11 03:11:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-11 03:11:52,951 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:52,951 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:52,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 03:11:53,154 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,SelfDestructingSolverStorable5 [2024-10-11 03:11:53,155 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:53,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1801360064, now seen corresponding path program 3 times [2024-10-11 03:11:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:53,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849280765] [2024-10-11 03:11:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:53,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:11:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:53,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:53,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:53,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:53,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:53,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 03:11:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:54,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:54,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:54,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:11:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:54,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:11:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:11:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 22 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-10-11 03:11:54,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849280765] [2024-10-11 03:11:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849280765] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976139941] [2024-10-11 03:11:54,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 03:11:54,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:54,418 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) [2024-10-11 03:11:54,420 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 [2024-10-11 03:11:54,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-11 03:11:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:11:54,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-11 03:11:54,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:54,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:11:54,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:11:55,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-11 03:11:55,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 03:11:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 26 proven. 27 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-11 03:11:55,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:56,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:11:56,283 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 31 treesize of output 34 [2024-10-11 03:11:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976139941] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:56,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:11:56,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 50 [2024-10-11 03:11:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014756803] [2024-10-11 03:11:56,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:56,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-11 03:11:56,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-11 03:11:56,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3231, Unknown=0, NotChecked=0, Total=3422 [2024-10-11 03:11:56,497 INFO L87 Difference]: Start difference. First operand 115 states and 169 transitions. Second operand has 50 states, 40 states have (on average 1.8) internal successors, (72), 37 states have internal predecessors, (72), 16 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-11 03:11:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:58,838 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2024-10-11 03:11:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 03:11:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 40 states have (on average 1.8) internal successors, (72), 37 states have internal predecessors, (72), 16 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 74 [2024-10-11 03:11:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:58,842 INFO L225 Difference]: With dead ends: 211 [2024-10-11 03:11:58,842 INFO L226 Difference]: Without dead ends: 209 [2024-10-11 03:11:58,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=504, Invalid=7328, Unknown=0, NotChecked=0, Total=7832 [2024-10-11 03:11:58,845 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:58,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 441 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-11 03:11:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-10-11 03:11:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 160. [2024-10-11 03:11:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 113 states have (on average 1.247787610619469) internal successors, (141), 118 states have internal predecessors, (141), 23 states have call successors, (23), 12 states have call predecessors, (23), 23 states have return successors, (94), 29 states have call predecessors, (94), 15 states have call successors, (94) [2024-10-11 03:11:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 258 transitions. [2024-10-11 03:11:58,894 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 258 transitions. Word has length 74 [2024-10-11 03:11:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:58,895 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 258 transitions. [2024-10-11 03:11:58,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 40 states have (on average 1.8) internal successors, (72), 37 states have internal predecessors, (72), 16 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-11 03:11:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 258 transitions. [2024-10-11 03:11:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-11 03:11:58,899 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:58,899 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:58,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 03:11:59,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:59,101 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:59,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:59,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1299718097, now seen corresponding path program 1 times [2024-10-11 03:11:59,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:59,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139837223] [2024-10-11 03:11:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:59,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:12:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 03:12:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,786 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 03:12:00,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:12:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139837223] [2024-10-11 03:12:00,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139837223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53832885] [2024-10-11 03:12:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:12:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:12:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:12:00,832 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) [2024-10-11 03:12:00,840 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 [2024-10-11 03:12:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:00,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-10-11 03:12:00,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:12:01,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 03:12:01,033 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 13 treesize of output 9 [2024-10-11 03:12:02,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-11 03:12:02,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 03:12:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-11 03:12:02,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:12:03,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:12:03,554 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 35 treesize of output 38 [2024-10-11 03:12:04,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53832885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:04,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:12:04,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 55 [2024-10-11 03:12:04,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983119041] [2024-10-11 03:12:04,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:12:04,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-11 03:12:04,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:12:04,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-11 03:12:04,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4468, Unknown=0, NotChecked=0, Total=4692 [2024-10-11 03:12:04,009 INFO L87 Difference]: Start difference. First operand 160 states and 258 transitions. Second operand has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-11 03:12:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:12:07,559 INFO L93 Difference]: Finished difference Result 348 states and 619 transitions. [2024-10-11 03:12:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 03:12:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 75 [2024-10-11 03:12:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:12:07,563 INFO L225 Difference]: With dead ends: 348 [2024-10-11 03:12:07,563 INFO L226 Difference]: Without dead ends: 227 [2024-10-11 03:12:07,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=576, Invalid=9524, Unknown=0, NotChecked=0, Total=10100 [2024-10-11 03:12:07,568 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-11 03:12:07,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 320 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-11 03:12:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-10-11 03:12:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 176. [2024-10-11 03:12:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 126 states have (on average 1.2380952380952381) internal successors, (156), 129 states have internal predecessors, (156), 24 states have call successors, (24), 12 states have call predecessors, (24), 25 states have return successors, (106), 34 states have call predecessors, (106), 16 states have call successors, (106) [2024-10-11 03:12:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 286 transitions. [2024-10-11 03:12:07,616 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 286 transitions. Word has length 75 [2024-10-11 03:12:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:12:07,617 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 286 transitions. [2024-10-11 03:12:07,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-11 03:12:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 286 transitions. [2024-10-11 03:12:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-11 03:12:07,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:12:07,620 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:12:07,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 03:12:07,821 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,SelfDestructingSolverStorable7 [2024-10-11 03:12:07,822 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:12:07,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:12:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2098792093, now seen corresponding path program 2 times [2024-10-11 03:12:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:12:07,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627719353] [2024-10-11 03:12:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:12:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:12:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:07,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:12:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 03:12:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-11 03:12:08,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:12:08,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627719353] [2024-10-11 03:12:08,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627719353] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249904931] [2024-10-11 03:12:08,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:12:08,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:12:08,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:12:08,204 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) [2024-10-11 03:12:08,205 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 [2024-10-11 03:12:08,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:12:08,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:12:08,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 03:12:08,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:12:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-11 03:12:08,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:12:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-11 03:12:08,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249904931] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:12:08,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 03:12:08,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2024-10-11 03:12:08,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946371473] [2024-10-11 03:12:08,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 03:12:08,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 03:12:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:12:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 03:12:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2024-10-11 03:12:08,736 INFO L87 Difference]: Start difference. First operand 176 states and 286 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-11 03:12:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:12:09,343 INFO L93 Difference]: Finished difference Result 347 states and 641 transitions. [2024-10-11 03:12:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 03:12:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2024-10-11 03:12:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:12:09,350 INFO L225 Difference]: With dead ends: 347 [2024-10-11 03:12:09,350 INFO L226 Difference]: Without dead ends: 210 [2024-10-11 03:12:09,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 03:12:09,359 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:12:09,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 217 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:12:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-10-11 03:12:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 192. [2024-10-11 03:12:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.2028985507246377) internal successors, (166), 141 states have internal predecessors, (166), 24 states have call successors, (24), 12 states have call predecessors, (24), 29 states have return successors, (126), 38 states have call predecessors, (126), 16 states have call successors, (126) [2024-10-11 03:12:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 316 transitions. [2024-10-11 03:12:09,408 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 316 transitions. Word has length 75 [2024-10-11 03:12:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:12:09,408 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 316 transitions. [2024-10-11 03:12:09,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-11 03:12:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 316 transitions. [2024-10-11 03:12:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-11 03:12:09,410 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:12:09,410 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:12:09,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 03:12:09,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:12:09,611 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:12:09,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:12:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash 669259790, now seen corresponding path program 1 times [2024-10-11 03:12:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:12:09,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105255152] [2024-10-11 03:12:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:12:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:12:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:10,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:12:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:10,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:10,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:10,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:10,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:10,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 03:12:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:11,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:11,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:11,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:11,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 03:12:11,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:12:11,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105255152] [2024-10-11 03:12:11,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105255152] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:11,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411034089] [2024-10-11 03:12:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:12:11,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:12:11,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:12:11,346 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) [2024-10-11 03:12:11,348 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 [2024-10-11 03:12:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:11,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-10-11 03:12:11,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:12:11,587 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 13 treesize of output 9 [2024-10-11 03:12:11,591 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 19 treesize of output 1 [2024-10-11 03:12:13,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:12:13,502 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2024-10-11 03:12:13,511 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-11 03:12:13,512 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 19 treesize of output 7 [2024-10-11 03:12:13,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 03:12:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-11 03:12:13,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:12:14,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:12:14,894 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 33 treesize of output 36 [2024-10-11 03:12:15,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411034089] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:15,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:12:15,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34] total 60 [2024-10-11 03:12:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153256899] [2024-10-11 03:12:15,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:12:15,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-11 03:12:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:12:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-11 03:12:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=5441, Unknown=0, NotChecked=0, Total=5700 [2024-10-11 03:12:15,575 INFO L87 Difference]: Start difference. First operand 192 states and 316 transitions. Second operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 43 states have internal predecessors, (76), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-11 03:12:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:12:19,517 INFO L93 Difference]: Finished difference Result 252 states and 407 transitions. [2024-10-11 03:12:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-11 03:12:19,518 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 50 states have (on average 1.52) internal successors, (76), 43 states have internal predecessors, (76), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 76 [2024-10-11 03:12:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:12:19,520 INFO L225 Difference]: With dead ends: 252 [2024-10-11 03:12:19,520 INFO L226 Difference]: Without dead ends: 250 [2024-10-11 03:12:19,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=697, Invalid=12875, Unknown=0, NotChecked=0, Total=13572 [2024-10-11 03:12:19,523 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-11 03:12:19,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 407 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2795 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-11 03:12:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-10-11 03:12:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2024-10-11 03:12:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 139 states have (on average 1.20863309352518) internal successors, (168), 142 states have internal predecessors, (168), 24 states have call successors, (24), 12 states have call predecessors, (24), 29 states have return successors, (126), 38 states have call predecessors, (126), 16 states have call successors, (126) [2024-10-11 03:12:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 318 transitions. [2024-10-11 03:12:19,545 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 318 transitions. Word has length 76 [2024-10-11 03:12:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:12:19,545 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 318 transitions. [2024-10-11 03:12:19,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 50 states have (on average 1.52) internal successors, (76), 43 states have internal predecessors, (76), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-11 03:12:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 318 transitions. [2024-10-11 03:12:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-11 03:12:19,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:12:19,547 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:12:19,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 03:12:19,748 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,SelfDestructingSolverStorable9 [2024-10-11 03:12:19,749 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:12:19,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:12:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash -838292019, now seen corresponding path program 1 times [2024-10-11 03:12:19,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:12:19,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709438564] [2024-10-11 03:12:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:12:19,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:12:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:20,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:12:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:20,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:20,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:20,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:20,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:20,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 03:12:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:21,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:21,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:21,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:21,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-11 03:12:21,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:12:21,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709438564] [2024-10-11 03:12:21,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709438564] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:21,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998456619] [2024-10-11 03:12:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:12:21,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:12:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:12:21,242 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) [2024-10-11 03:12:21,243 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 [2024-10-11 03:12:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:21,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-11 03:12:21,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:12:21,431 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 19 treesize of output 1 [2024-10-11 03:12:21,432 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 13 treesize of output 9 [2024-10-11 03:12:22,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-11 03:12:22,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 03:12:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 03:12:22,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:12:22,541 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2024-10-11 03:12:22,543 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 25 treesize of output 25 [2024-10-11 03:12:22,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998456619] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:22,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:12:22,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 43 [2024-10-11 03:12:22,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429978922] [2024-10-11 03:12:22,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:12:22,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-11 03:12:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:12:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-11 03:12:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 03:12:22,712 INFO L87 Difference]: Start difference. First operand 193 states and 318 transitions. Second operand has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 14 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) [2024-10-11 03:12:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:12:24,336 INFO L93 Difference]: Finished difference Result 265 states and 422 transitions. [2024-10-11 03:12:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 03:12:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 14 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) Word has length 76 [2024-10-11 03:12:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:12:24,339 INFO L225 Difference]: With dead ends: 265 [2024-10-11 03:12:24,339 INFO L226 Difference]: Without dead ends: 263 [2024-10-11 03:12:24,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=349, Invalid=5053, Unknown=0, NotChecked=0, Total=5402 [2024-10-11 03:12:24,341 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 03:12:24,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 242 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-11 03:12:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-10-11 03:12:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 187. [2024-10-11 03:12:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 136 states have (on average 1.213235294117647) internal successors, (165), 136 states have internal predecessors, (165), 24 states have call successors, (24), 12 states have call predecessors, (24), 26 states have return successors, (111), 38 states have call predecessors, (111), 16 states have call successors, (111) [2024-10-11 03:12:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 300 transitions. [2024-10-11 03:12:24,362 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 300 transitions. Word has length 76 [2024-10-11 03:12:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:12:24,362 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 300 transitions. [2024-10-11 03:12:24,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 14 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) [2024-10-11 03:12:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 300 transitions. [2024-10-11 03:12:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-11 03:12:24,364 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:12:24,364 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:12:24,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 03:12:24,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:12:24,568 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:12:24,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:12:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash 721459472, now seen corresponding path program 2 times [2024-10-11 03:12:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:12:24,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810293976] [2024-10-11 03:12:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:12:24,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:12:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:24,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:12:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:24,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:24,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:24,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:24,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:24,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 03:12:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:25,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:25,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:12:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:25,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:12:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:25,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 03:12:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:12:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-11 03:12:25,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:12:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810293976] [2024-10-11 03:12:25,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810293976] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:12:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921014887] [2024-10-11 03:12:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:12:25,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:12:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:12:25,076 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:12:25,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 03:12:25,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:12:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:12:25,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-10-11 03:12:25,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:12:25,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-11 03:12:25,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:12:25,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:12:25,536 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_48 Int)) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_48) 0) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| v_nondet_tree_~n~0.base_48 (select |c_#memory_$Pointer$#1.offset| v_nondet_tree_~n~0.base_48))) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| v_nondet_tree_~n~0.base_48 (select |c_#memory_$Pointer$#1.base| v_nondet_tree_~n~0.base_48))))) is different from true [2024-10-11 03:12:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 03:12:25,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 03:12:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 03:12:25,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 03:12:25,563 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 03:12:25,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 03:12:25,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-11 03:12:25,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-11 03:13:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 8 not checked. [2024-10-11 03:13:02,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:13:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921014887] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:13:02,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:13:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 34 [2024-10-11 03:13:02,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165820979] [2024-10-11 03:13:02,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:13:02,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-11 03:13:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:13:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-11 03:13:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1220, Unknown=10, NotChecked=70, Total=1406 [2024-10-11 03:13:02,529 INFO L87 Difference]: Start difference. First operand 187 states and 300 transitions. Second operand has 34 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 14 states have call successors, (22), 8 states have call predecessors, (22), 13 states have return successors, (20), 14 states have call predecessors, (20), 13 states have call successors, (20) [2024-10-11 03:13:06,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]