./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/relax-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 15:16:32,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 15:16:32,574 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 15:16:32,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 15:16:32,581 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 15:16:32,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 15:16:32,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 15:16:32,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 15:16:32,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 15:16:32,610 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 15:16:32,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 15:16:32,611 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 15:16:32,612 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 15:16:32,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 15:16:32,615 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 15:16:32,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 15:16:32,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 15:16:32,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 15:16:32,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 15:16:32,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 15:16:32,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 15:16:32,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 15:16:32,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 15:16:32,618 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 15:16:32,618 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 15:16:32,618 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 15:16:32,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 15:16:32,619 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 15:16:32,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 15:16:32,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 15:16:32,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 15:16:32,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 15:16:32,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:16:32,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 15:16:32,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 15:16:32,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 15:16:32,622 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 15:16:32,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 15:16:32,622 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 15:16:32,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 15:16:32,623 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 15:16:32,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 15:16:32,623 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2024-11-11 15:16:32,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 15:16:32,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 15:16:32,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 15:16:32,898 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 15:16:32,899 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 15:16:32,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-11 15:16:34,351 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 15:16:34,631 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 15:16:34,634 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-11 15:16:34,653 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/580768cbb/e33832b57f7a4238848d7a90ca61c1e6/FLAG7835079d6 [2024-11-11 15:16:34,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/580768cbb/e33832b57f7a4238848d7a90ca61c1e6 [2024-11-11 15:16:34,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 15:16:34,677 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 15:16:34,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 15:16:34,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 15:16:34,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 15:16:34,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:16:34" (1/1) ... [2024-11-11 15:16:34,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2778358d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:34, skipping insertion in model container [2024-11-11 15:16:34,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:16:34" (1/1) ... [2024-11-11 15:16:34,735 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 15:16:34,958 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-11 15:16:35,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:16:35,089 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 15:16:35,102 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-11 15:16:35,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:16:35,183 INFO L204 MainTranslator]: Completed translation [2024-11-11 15:16:35,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35 WrapperNode [2024-11-11 15:16:35,183 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 15:16:35,184 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 15:16:35,186 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 15:16:35,186 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 15:16:35,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,233 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 140 [2024-11-11 15:16:35,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 15:16:35,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 15:16:35,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 15:16:35,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 15:16:35,244 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,250 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,264 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-11 15:16:35,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,284 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 15:16:35,285 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 15:16:35,285 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 15:16:35,286 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 15:16:35,287 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (1/1) ... [2024-11-11 15:16:35,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:16:35,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:35,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 15:16:35,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 15:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 15:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 15:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 15:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 15:16:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 15:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 15:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 15:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 15:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 15:16:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 15:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-11 15:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 15:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 15:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 15:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 15:16:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 15:16:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 15:16:35,499 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 15:16:35,502 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 15:16:35,822 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-11 15:16:35,822 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 15:16:35,841 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 15:16:35,842 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-11 15:16:35,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:16:35 BoogieIcfgContainer [2024-11-11 15:16:35,842 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 15:16:35,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 15:16:35,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 15:16:35,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 15:16:35,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:16:34" (1/3) ... [2024-11-11 15:16:35,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f957c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:16:35, skipping insertion in model container [2024-11-11 15:16:35,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:16:35" (2/3) ... [2024-11-11 15:16:35,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f957c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:16:35, skipping insertion in model container [2024-11-11 15:16:35,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:16:35" (3/3) ... [2024-11-11 15:16:35,865 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-11-11 15:16:35,881 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 15:16:35,881 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 15:16:35,941 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 15:16:35,948 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;@3a9a7956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 15:16:35,948 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 15:16:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 48 states have internal predecessors, (69), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:16:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-11 15:16:35,957 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:35,958 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:35,958 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:35,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:35,963 INFO L85 PathProgramCache]: Analyzing trace with hash 321674508, now seen corresponding path program 1 times [2024-11-11 15:16:35,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:35,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886342081] [2024-11-11 15:16:35,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:35,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:36,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:36,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886342081] [2024-11-11 15:16:36,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886342081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:36,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:16:36,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 15:16:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227836099] [2024-11-11 15:16:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:36,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 15:16:36,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 15:16:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 15:16:36,223 INFO L87 Difference]: Start difference. First operand has 55 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 48 states have internal predecessors, (69), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 15:16:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:36,246 INFO L93 Difference]: Finished difference Result 107 states and 169 transitions. [2024-11-11 15:16:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 15:16:36,249 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-11 15:16:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:36,259 INFO L225 Difference]: With dead ends: 107 [2024-11-11 15:16:36,259 INFO L226 Difference]: Without dead ends: 49 [2024-11-11 15:16:36,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 15:16:36,266 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:36,267 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:16:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-11 15:16:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-11 15:16:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 43 states have internal predecessors, (55), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 15:16:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-11 15:16:36,301 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 24 [2024-11-11 15:16:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:36,302 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-11 15:16:36,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 15:16:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-11 15:16:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-11 15:16:36,304 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:36,304 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:36,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 15:16:36,304 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:36,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1775837620, now seen corresponding path program 1 times [2024-11-11 15:16:36,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297198479] [2024-11-11 15:16:36,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:36,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:36,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297198479] [2024-11-11 15:16:36,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297198479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:36,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:16:36,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 15:16:36,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081264759] [2024-11-11 15:16:36,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:36,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 15:16:36,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 15:16:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:16:36,627 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:36,664 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2024-11-11 15:16:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 15:16:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-11 15:16:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:36,667 INFO L225 Difference]: With dead ends: 73 [2024-11-11 15:16:36,667 INFO L226 Difference]: Without dead ends: 51 [2024-11-11 15:16:36,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:16:36,671 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:36,671 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:16:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-11 15:16:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-11 15:16:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 15:16:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2024-11-11 15:16:36,682 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2024-11-11 15:16:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:36,684 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2024-11-11 15:16:36,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:36,684 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2024-11-11 15:16:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-11 15:16:36,685 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:36,685 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:36,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 15:16:36,685 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:36,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1388994825, now seen corresponding path program 1 times [2024-11-11 15:16:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:36,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788312821] [2024-11-11 15:16:36,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:36,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:36,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788312821] [2024-11-11 15:16:36,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788312821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:36,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:16:36,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-11 15:16:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682806789] [2024-11-11 15:16:36,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:36,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 15:16:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 15:16:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-11 15:16:36,997 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:37,137 INFO L93 Difference]: Finished difference Result 106 states and 144 transitions. [2024-11-11 15:16:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 15:16:37,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-11 15:16:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:37,140 INFO L225 Difference]: With dead ends: 106 [2024-11-11 15:16:37,140 INFO L226 Difference]: Without dead ends: 72 [2024-11-11 15:16:37,140 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-11 15:16:37,141 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:37,142 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 274 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:16:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-11 15:16:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2024-11-11 15:16:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 63 states have internal predecessors, (82), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 15:16:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2024-11-11 15:16:37,159 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 27 [2024-11-11 15:16:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:37,159 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2024-11-11 15:16:37,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2024-11-11 15:16:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-11 15:16:37,161 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:37,162 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:37,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-11 15:16:37,162 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:37,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash -835779302, now seen corresponding path program 1 times [2024-11-11 15:16:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277974515] [2024-11-11 15:16:37,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:37,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:37,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:37,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277974515] [2024-11-11 15:16:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277974515] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:37,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:16:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-11 15:16:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307056186] [2024-11-11 15:16:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:37,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 15:16:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 15:16:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-11 15:16:37,678 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:37,873 INFO L93 Difference]: Finished difference Result 109 states and 146 transitions. [2024-11-11 15:16:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 15:16:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-11 15:16:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:37,875 INFO L225 Difference]: With dead ends: 109 [2024-11-11 15:16:37,875 INFO L226 Difference]: Without dead ends: 96 [2024-11-11 15:16:37,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-11 15:16:37,876 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:37,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 366 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:16:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-11 15:16:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2024-11-11 15:16:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 72 states have internal predecessors, (95), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 15:16:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 108 transitions. [2024-11-11 15:16:37,894 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 108 transitions. Word has length 28 [2024-11-11 15:16:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:37,895 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 108 transitions. [2024-11-11 15:16:37,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2024-11-11 15:16:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-11 15:16:37,897 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:37,897 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:37,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 15:16:37,897 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:37,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash 339592345, now seen corresponding path program 1 times [2024-11-11 15:16:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692401648] [2024-11-11 15:16:37,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:38,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:38,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:38,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:38,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692401648] [2024-11-11 15:16:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692401648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:38,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265423765] [2024-11-11 15:16:38,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:38,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:38,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:38,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 15:16:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:38,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-11 15:16:38,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:38,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265423765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:39,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:39,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-11 15:16:39,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421849381] [2024-11-11 15:16:39,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:39,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-11 15:16:39,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-11 15:16:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-11 15:16:39,029 INFO L87 Difference]: Start difference. First operand 78 states and 108 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:39,571 INFO L93 Difference]: Finished difference Result 203 states and 292 transitions. [2024-11-11 15:16:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-11 15:16:39,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-11 15:16:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:39,576 INFO L225 Difference]: With dead ends: 203 [2024-11-11 15:16:39,576 INFO L226 Difference]: Without dead ends: 173 [2024-11-11 15:16:39,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2024-11-11 15:16:39,580 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 297 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:39,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 930 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 15:16:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-11 15:16:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 128. [2024-11-11 15:16:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 115 states have (on average 1.4173913043478261) internal successors, (163), 120 states have internal predecessors, (163), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 180 transitions. [2024-11-11 15:16:39,611 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 180 transitions. Word has length 29 [2024-11-11 15:16:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:39,611 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 180 transitions. [2024-11-11 15:16:39,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 180 transitions. [2024-11-11 15:16:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 15:16:39,613 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:39,613 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:39,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 15:16:39,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:39,818 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:39,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1652567176, now seen corresponding path program 1 times [2024-11-11 15:16:39,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:39,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541158773] [2024-11-11 15:16:39,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:39,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:39,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:39,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:39,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:39,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541158773] [2024-11-11 15:16:39,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541158773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:39,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:16:39,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 15:16:39,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499837192] [2024-11-11 15:16:39,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:39,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 15:16:39,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:39,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 15:16:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 15:16:39,968 INFO L87 Difference]: Start difference. First operand 128 states and 180 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:40,057 INFO L93 Difference]: Finished difference Result 147 states and 201 transitions. [2024-11-11 15:16:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 15:16:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-11 15:16:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:40,059 INFO L225 Difference]: With dead ends: 147 [2024-11-11 15:16:40,059 INFO L226 Difference]: Without dead ends: 122 [2024-11-11 15:16:40,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 15:16:40,060 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:40,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 226 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:16:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-11 15:16:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2024-11-11 15:16:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 108 states have internal predecessors, (142), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 159 transitions. [2024-11-11 15:16:40,076 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 159 transitions. Word has length 30 [2024-11-11 15:16:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:40,076 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 159 transitions. [2024-11-11 15:16:40,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 159 transitions. [2024-11-11 15:16:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 15:16:40,078 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:40,078 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:40,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-11 15:16:40,078 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:40,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1208968374, now seen corresponding path program 1 times [2024-11-11 15:16:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:40,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125633086] [2024-11-11 15:16:40,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:40,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:40,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:40,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:40,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125633086] [2024-11-11 15:16:40,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125633086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:40,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622981121] [2024-11-11 15:16:40,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:40,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:40,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:40,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:40,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 15:16:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:40,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-11 15:16:40,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:40,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622981121] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:40,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-11 15:16:40,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 8] total 16 [2024-11-11 15:16:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956306873] [2024-11-11 15:16:40,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:40,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 15:16:40,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 15:16:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-11 15:16:40,752 INFO L87 Difference]: Start difference. First operand 116 states and 159 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:40,818 INFO L93 Difference]: Finished difference Result 139 states and 184 transitions. [2024-11-11 15:16:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 15:16:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-11 15:16:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:40,820 INFO L225 Difference]: With dead ends: 139 [2024-11-11 15:16:40,821 INFO L226 Difference]: Without dead ends: 118 [2024-11-11 15:16:40,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-11 15:16:40,823 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:40,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 150 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:16:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-11 15:16:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2024-11-11 15:16:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.3398058252427185) internal successors, (138), 108 states have internal predecessors, (138), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2024-11-11 15:16:40,839 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 30 [2024-11-11 15:16:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:40,839 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2024-11-11 15:16:40,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2024-11-11 15:16:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 15:16:40,841 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:40,841 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:40,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 15:16:41,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-11 15:16:41,046 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:41,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1229420613, now seen corresponding path program 1 times [2024-11-11 15:16:41,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:41,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861757511] [2024-11-11 15:16:41,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:41,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:41,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:41,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:41,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861757511] [2024-11-11 15:16:41,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861757511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:41,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:16:41,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 15:16:41,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526599851] [2024-11-11 15:16:41,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:41,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 15:16:41,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 15:16:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:16:41,159 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:41,181 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2024-11-11 15:16:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 15:16:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-11 15:16:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:41,182 INFO L225 Difference]: With dead ends: 135 [2024-11-11 15:16:41,182 INFO L226 Difference]: Without dead ends: 102 [2024-11-11 15:16:41,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:16:41,183 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:41,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:16:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-11 15:16:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-11 15:16:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2024-11-11 15:16:41,192 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 31 [2024-11-11 15:16:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:41,193 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2024-11-11 15:16:41,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2024-11-11 15:16:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 15:16:41,194 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:41,194 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-11 15:16:41,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-11 15:16:41,194 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:41,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:41,195 INFO L85 PathProgramCache]: Analyzing trace with hash -640480837, now seen corresponding path program 2 times [2024-11-11 15:16:41,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:41,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719358464] [2024-11-11 15:16:41,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:41,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:41,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:41,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719358464] [2024-11-11 15:16:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719358464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322396616] [2024-11-11 15:16:41,505 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:16:41,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:41,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:41,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 15:16:41,609 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-11 15:16:41,610 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:16:41,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-11 15:16:41,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 15:16:41,709 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 15:16:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322396616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:41,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 15:16:41,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2024-11-11 15:16:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068267041] [2024-11-11 15:16:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:41,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 15:16:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 15:16:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-11 15:16:41,711 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:41,805 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2024-11-11 15:16:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 15:16:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-11 15:16:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:41,806 INFO L225 Difference]: With dead ends: 110 [2024-11-11 15:16:41,806 INFO L226 Difference]: Without dead ends: 108 [2024-11-11 15:16:41,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:16:41,807 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 39 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:41,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 206 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:16:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-11 15:16:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2024-11-11 15:16:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.315217391304348) internal successors, (121), 97 states have internal predecessors, (121), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2024-11-11 15:16:41,823 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 31 [2024-11-11 15:16:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:41,824 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2024-11-11 15:16:41,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2024-11-11 15:16:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 15:16:41,825 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:41,825 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:41,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 15:16:42,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:42,026 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:42,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash -725981085, now seen corresponding path program 1 times [2024-11-11 15:16:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135448978] [2024-11-11 15:16:42,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:42,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:42,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:42,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:42,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135448978] [2024-11-11 15:16:42,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135448978] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:42,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:16:42,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 15:16:42,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421056522] [2024-11-11 15:16:42,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:42,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 15:16:42,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 15:16:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 15:16:42,091 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:42,117 INFO L93 Difference]: Finished difference Result 151 states and 200 transitions. [2024-11-11 15:16:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 15:16:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-11 15:16:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:42,118 INFO L225 Difference]: With dead ends: 151 [2024-11-11 15:16:42,119 INFO L226 Difference]: Without dead ends: 128 [2024-11-11 15:16:42,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 15:16:42,119 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:42,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:16:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-11 15:16:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2024-11-11 15:16:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 119 states have internal predecessors, (150), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 167 transitions. [2024-11-11 15:16:42,133 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 167 transitions. Word has length 33 [2024-11-11 15:16:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:42,134 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 167 transitions. [2024-11-11 15:16:42,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 167 transitions. [2024-11-11 15:16:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-11 15:16:42,135 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:42,135 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:42,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-11 15:16:42,135 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:42,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash 952334873, now seen corresponding path program 1 times [2024-11-11 15:16:42,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:42,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458729117] [2024-11-11 15:16:42,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:42,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:42,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:42,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458729117] [2024-11-11 15:16:42,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458729117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:42,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52296233] [2024-11-11 15:16:42,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:42,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:42,339 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:42,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 15:16:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:42,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-11 15:16:42,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:42,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:16:42,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52296233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:42,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:42,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 13] total 25 [2024-11-11 15:16:42,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785112870] [2024-11-11 15:16:42,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:42,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-11 15:16:42,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-11 15:16:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-11-11 15:16:42,983 INFO L87 Difference]: Start difference. First operand 128 states and 167 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:43,530 INFO L93 Difference]: Finished difference Result 226 states and 296 transitions. [2024-11-11 15:16:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-11 15:16:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-11-11 15:16:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:43,532 INFO L225 Difference]: With dead ends: 226 [2024-11-11 15:16:43,534 INFO L226 Difference]: Without dead ends: 144 [2024-11-11 15:16:43,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2024-11-11 15:16:43,536 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 80 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:43,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 791 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 15:16:43,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-11 15:16:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2024-11-11 15:16:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 93 states have (on average 1.3118279569892473) internal successors, (122), 98 states have internal predecessors, (122), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2024-11-11 15:16:43,548 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 37 [2024-11-11 15:16:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:43,548 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2024-11-11 15:16:43,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2024-11-11 15:16:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-11 15:16:43,549 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:43,549 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:43,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-11 15:16:43,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:43,750 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:43,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1242146367, now seen corresponding path program 1 times [2024-11-11 15:16:43,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:43,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732531218] [2024-11-11 15:16:43,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:43,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:43,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:43,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 15:16:43,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:43,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732531218] [2024-11-11 15:16:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732531218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:43,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218309781] [2024-11-11 15:16:43,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:43,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:43,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:43,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:43,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 15:16:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:43,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-11 15:16:43,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 15:16:44,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 15:16:44,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218309781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:44,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2024-11-11 15:16:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164393653] [2024-11-11 15:16:44,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:44,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 15:16:44,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 15:16:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:16:44,301 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:44,467 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2024-11-11 15:16:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 15:16:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-11 15:16:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:44,469 INFO L225 Difference]: With dead ends: 146 [2024-11-11 15:16:44,470 INFO L226 Difference]: Without dead ends: 139 [2024-11-11 15:16:44,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:16:44,471 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 39 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:44,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 631 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:16:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-11 15:16:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2024-11-11 15:16:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 101 states have (on average 1.306930693069307) internal successors, (132), 106 states have internal predecessors, (132), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2024-11-11 15:16:44,486 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 39 [2024-11-11 15:16:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:44,486 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2024-11-11 15:16:44,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2024-11-11 15:16:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-11 15:16:44,487 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:44,487 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:44,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 15:16:44,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-11 15:16:44,688 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:44,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1243993409, now seen corresponding path program 1 times [2024-11-11 15:16:44,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:44,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259882079] [2024-11-11 15:16:44,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:44,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:44,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:44,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 15:16:44,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259882079] [2024-11-11 15:16:44,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259882079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556243164] [2024-11-11 15:16:44,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:44,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:44,918 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:44,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 15:16:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:45,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 15:16:45,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 15:16:45,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 15:16:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556243164] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:45,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-11 15:16:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 13 [2024-11-11 15:16:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324657863] [2024-11-11 15:16:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:45,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 15:16:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 15:16:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-11 15:16:45,185 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:45,252 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2024-11-11 15:16:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 15:16:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-11 15:16:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:45,254 INFO L225 Difference]: With dead ends: 137 [2024-11-11 15:16:45,254 INFO L226 Difference]: Without dead ends: 128 [2024-11-11 15:16:45,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-11 15:16:45,256 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 33 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:45,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:16:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-11 15:16:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2024-11-11 15:16:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 105 states have (on average 1.3047619047619048) internal successors, (137), 110 states have internal predecessors, (137), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2024-11-11 15:16:45,269 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 39 [2024-11-11 15:16:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:45,269 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2024-11-11 15:16:45,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2024-11-11 15:16:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-11 15:16:45,271 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:45,272 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:45,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-11 15:16:45,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:45,473 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:45,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -850016227, now seen corresponding path program 1 times [2024-11-11 15:16:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:45,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333325959] [2024-11-11 15:16:45,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:45,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:45,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:45,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333325959] [2024-11-11 15:16:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333325959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:45,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632382553] [2024-11-11 15:16:45,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:45,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:45,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:45,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:45,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 15:16:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:45,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-11 15:16:45,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 15:16:45,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 15:16:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632382553] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:46,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-11 15:16:46,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 7] total 15 [2024-11-11 15:16:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936179114] [2024-11-11 15:16:46,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:46,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 15:16:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 15:16:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:16:46,105 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:46,161 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2024-11-11 15:16:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 15:16:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-11 15:16:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:46,163 INFO L225 Difference]: With dead ends: 126 [2024-11-11 15:16:46,163 INFO L226 Difference]: Without dead ends: 117 [2024-11-11 15:16:46,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:16:46,164 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 50 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:46,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:16:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-11 15:16:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-11 15:16:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 103 states have (on average 1.3009708737864079) internal successors, (134), 108 states have internal predecessors, (134), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2024-11-11 15:16:46,173 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 41 [2024-11-11 15:16:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:46,173 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2024-11-11 15:16:46,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2024-11-11 15:16:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 15:16:46,174 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:46,174 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:46,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-11 15:16:46,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:46,375 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:46,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:46,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1539771276, now seen corresponding path program 1 times [2024-11-11 15:16:46,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:46,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378412680] [2024-11-11 15:16:46,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:46,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:46,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:46,498 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-11 15:16:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:46,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378412680] [2024-11-11 15:16:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378412680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969531086] [2024-11-11 15:16:46,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:46,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:46,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:46,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:46,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 15:16:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:46,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-11 15:16:46,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:16:46,615 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 15:16:46,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969531086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:46,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 15:16:46,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2024-11-11 15:16:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295859222] [2024-11-11 15:16:46,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:46,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 15:16:46,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 15:16:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-11 15:16:46,617 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:16:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:46,647 INFO L93 Difference]: Finished difference Result 142 states and 185 transitions. [2024-11-11 15:16:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 15:16:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-11 15:16:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:46,648 INFO L225 Difference]: With dead ends: 142 [2024-11-11 15:16:46,648 INFO L226 Difference]: Without dead ends: 124 [2024-11-11 15:16:46,648 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-11 15:16:46,649 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:46,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 118 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:16:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-11 15:16:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2024-11-11 15:16:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 107 states have (on average 1.308411214953271) internal successors, (140), 112 states have internal predecessors, (140), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:16:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2024-11-11 15:16:46,663 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 43 [2024-11-11 15:16:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:46,663 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2024-11-11 15:16:46,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:16:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2024-11-11 15:16:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-11 15:16:46,664 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:46,664 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:46,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-11 15:16:46,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-11 15:16:46,870 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:46,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1835283646, now seen corresponding path program 1 times [2024-11-11 15:16:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:46,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507377936] [2024-11-11 15:16:46,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:47,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:47,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:47,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:47,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507377936] [2024-11-11 15:16:47,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507377936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:47,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118887861] [2024-11-11 15:16:47,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:47,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:47,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:47,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:47,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 15:16:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:47,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-11 15:16:47,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:16:47,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118887861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:47,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:47,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 13] total 29 [2024-11-11 15:16:47,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384261893] [2024-11-11 15:16:47,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:47,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-11 15:16:47,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-11 15:16:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-11 15:16:47,747 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:49,080 INFO L93 Difference]: Finished difference Result 307 states and 415 transitions. [2024-11-11 15:16:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-11 15:16:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-11 15:16:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:49,082 INFO L225 Difference]: With dead ends: 307 [2024-11-11 15:16:49,082 INFO L226 Difference]: Without dead ends: 231 [2024-11-11 15:16:49,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=2036, Unknown=0, NotChecked=0, Total=2352 [2024-11-11 15:16:49,084 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 255 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:49,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1239 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 15:16:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-11 15:16:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 143. [2024-11-11 15:16:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 128 states have (on average 1.2890625) internal successors, (165), 133 states have internal predecessors, (165), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:16:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 184 transitions. [2024-11-11 15:16:49,103 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 184 transitions. Word has length 42 [2024-11-11 15:16:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:49,103 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 184 transitions. [2024-11-11 15:16:49,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 184 transitions. [2024-11-11 15:16:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-11 15:16:49,105 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:49,105 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:49,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-11 15:16:49,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-11 15:16:49,305 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:49,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1511968994, now seen corresponding path program 1 times [2024-11-11 15:16:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:49,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638773704] [2024-11-11 15:16:49,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:49,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:49,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 15:16:49,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:49,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638773704] [2024-11-11 15:16:49,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638773704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:49,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184686554] [2024-11-11 15:16:49,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:49,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:49,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:49,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 15:16:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:49,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-11 15:16:49,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:49,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 15:16:49,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184686554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:49,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:49,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2024-11-11 15:16:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825275434] [2024-11-11 15:16:49,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:49,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-11 15:16:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-11 15:16:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-11 15:16:49,917 INFO L87 Difference]: Start difference. First operand 143 states and 184 transitions. Second operand has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:50,460 INFO L93 Difference]: Finished difference Result 367 states and 508 transitions. [2024-11-11 15:16:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-11 15:16:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-11 15:16:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:50,462 INFO L225 Difference]: With dead ends: 367 [2024-11-11 15:16:50,462 INFO L226 Difference]: Without dead ends: 332 [2024-11-11 15:16:50,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-11-11 15:16:50,464 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 225 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:50,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 771 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 15:16:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2024-11-11 15:16:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 175. [2024-11-11 15:16:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 160 states have (on average 1.31875) internal successors, (211), 165 states have internal predecessors, (211), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:16:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2024-11-11 15:16:50,490 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 44 [2024-11-11 15:16:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:50,490 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2024-11-11 15:16:50,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2024-11-11 15:16:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-11 15:16:50,491 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:50,491 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:50,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-11 15:16:50,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-11 15:16:50,697 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:50,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:50,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1510121952, now seen corresponding path program 1 times [2024-11-11 15:16:50,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:50,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838403965] [2024-11-11 15:16:50,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:50,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:50,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:50,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:16:50,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:50,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838403965] [2024-11-11 15:16:50,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838403965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:50,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305296236] [2024-11-11 15:16:50,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:50,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:50,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:50,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:50,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-11 15:16:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:51,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-11 15:16:51,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:16:51,221 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:16:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305296236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:51,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-11 15:16:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594929683] [2024-11-11 15:16:51,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:51,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 15:16:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 15:16:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-11 15:16:51,371 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:51,637 INFO L93 Difference]: Finished difference Result 276 states and 376 transitions. [2024-11-11 15:16:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-11 15:16:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-11 15:16:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:51,639 INFO L225 Difference]: With dead ends: 276 [2024-11-11 15:16:51,640 INFO L226 Difference]: Without dead ends: 250 [2024-11-11 15:16:51,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-11 15:16:51,640 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 80 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:51,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 591 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:16:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-11 15:16:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 168. [2024-11-11 15:16:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 153 states have (on average 1.3071895424836601) internal successors, (200), 158 states have internal predecessors, (200), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:16:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 219 transitions. [2024-11-11 15:16:51,662 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 219 transitions. Word has length 44 [2024-11-11 15:16:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:51,662 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 219 transitions. [2024-11-11 15:16:51,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 219 transitions. [2024-11-11 15:16:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-11 15:16:51,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:51,663 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:51,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-11 15:16:51,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-11 15:16:51,864 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:51,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:51,865 INFO L85 PathProgramCache]: Analyzing trace with hash -831910624, now seen corresponding path program 1 times [2024-11-11 15:16:51,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:51,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122211283] [2024-11-11 15:16:51,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:51,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:52,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:52,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 15:16:52,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:52,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122211283] [2024-11-11 15:16:52,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122211283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:52,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175891146] [2024-11-11 15:16:52,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:52,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:52,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:52,479 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:52,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-11 15:16:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:52,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-11 15:16:52,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:52,650 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 [2024-11-11 15:16:52,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-11 15:16:52,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-11 15:16:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:53,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:53,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:16:53,347 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 [2024-11-11 15:16:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 15:16:53,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175891146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:53,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:53,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 33 [2024-11-11 15:16:53,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137997043] [2024-11-11 15:16:53,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:53,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-11 15:16:53,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-11 15:16:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-11-11 15:16:53,447 INFO L87 Difference]: Start difference. First operand 168 states and 219 transitions. Second operand has 33 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:55,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:55,085 INFO L93 Difference]: Finished difference Result 360 states and 487 transitions. [2024-11-11 15:16:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-11 15:16:55,086 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-11 15:16:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:55,088 INFO L225 Difference]: With dead ends: 360 [2024-11-11 15:16:55,088 INFO L226 Difference]: Without dead ends: 311 [2024-11-11 15:16:55,089 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2024-11-11 15:16:55,089 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 323 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:55,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1594 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-11 15:16:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-11 15:16:55,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 196. [2024-11-11 15:16:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 181 states have (on average 1.3259668508287292) internal successors, (240), 186 states have internal predecessors, (240), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:16:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 259 transitions. [2024-11-11 15:16:55,117 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 259 transitions. Word has length 44 [2024-11-11 15:16:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:55,117 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 259 transitions. [2024-11-11 15:16:55,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 259 transitions. [2024-11-11 15:16:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-11 15:16:55,118 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:55,118 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:55,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-11 15:16:55,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:55,323 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:55,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1037594498, now seen corresponding path program 2 times [2024-11-11 15:16:55,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:55,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665317935] [2024-11-11 15:16:55,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:55,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:55,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:55,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:55,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665317935] [2024-11-11 15:16:55,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665317935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:55,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013494122] [2024-11-11 15:16:55,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:16:55,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:55,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:55,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:55,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-11 15:16:55,796 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-11 15:16:55,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:16:55,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-11 15:16:55,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 15:16:55,943 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 15:16:55,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013494122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:16:55,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 15:16:55,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2024-11-11 15:16:55,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399951056] [2024-11-11 15:16:55,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:16:55,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 15:16:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 15:16:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:16:55,945 INFO L87 Difference]: Start difference. First operand 196 states and 259 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:56,017 INFO L93 Difference]: Finished difference Result 263 states and 344 transitions. [2024-11-11 15:16:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 15:16:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-11 15:16:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:56,021 INFO L225 Difference]: With dead ends: 263 [2024-11-11 15:16:56,021 INFO L226 Difference]: Without dead ends: 254 [2024-11-11 15:16:56,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:16:56,022 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:56,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:16:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-11 15:16:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2024-11-11 15:16:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 181 states have (on average 1.3259668508287292) internal successors, (240), 186 states have internal predecessors, (240), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:16:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 259 transitions. [2024-11-11 15:16:56,053 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 259 transitions. Word has length 46 [2024-11-11 15:16:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:56,054 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 259 transitions. [2024-11-11 15:16:56,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 259 transitions. [2024-11-11 15:16:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-11 15:16:56,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:56,055 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:56,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-11 15:16:56,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-11 15:16:56,256 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:56,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash 82184506, now seen corresponding path program 2 times [2024-11-11 15:16:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496142218] [2024-11-11 15:16:56,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:56,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:56,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 15:16:56,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496142218] [2024-11-11 15:16:56,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496142218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140301316] [2024-11-11 15:16:56,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:16:56,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:56,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:56,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-11 15:16:56,781 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:16:56,782 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:16:56,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-11 15:16:56,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 15:16:56,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 15:16:57,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140301316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:57,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:57,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 24 [2024-11-11 15:16:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259235814] [2024-11-11 15:16:57,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:57,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-11 15:16:57,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-11 15:16:57,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-11-11 15:16:57,114 INFO L87 Difference]: Start difference. First operand 196 states and 259 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:16:58,049 INFO L93 Difference]: Finished difference Result 476 states and 651 transitions. [2024-11-11 15:16:58,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-11 15:16:58,050 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-11 15:16:58,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:16:58,053 INFO L225 Difference]: With dead ends: 476 [2024-11-11 15:16:58,053 INFO L226 Difference]: Without dead ends: 461 [2024-11-11 15:16:58,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2024-11-11 15:16:58,054 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 309 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-11 15:16:58,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1509 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-11 15:16:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-11-11 15:16:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 230. [2024-11-11 15:16:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 215 states have (on average 1.3348837209302327) internal successors, (287), 220 states have internal predecessors, (287), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:16:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 306 transitions. [2024-11-11 15:16:58,103 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 306 transitions. Word has length 46 [2024-11-11 15:16:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:16:58,103 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 306 transitions. [2024-11-11 15:16:58,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:16:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 306 transitions. [2024-11-11 15:16:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-11 15:16:58,105 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:16:58,105 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:16:58,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-11 15:16:58,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:58,309 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:16:58,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:16:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -185711276, now seen corresponding path program 1 times [2024-11-11 15:16:58,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:16:58,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784062274] [2024-11-11 15:16:58,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:16:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:58,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:16:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:58,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:16:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:16:58,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:16:58,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784062274] [2024-11-11 15:16:58,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784062274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:16:58,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575163126] [2024-11-11 15:16:58,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:16:58,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:16:58,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:16:58,640 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:16:58,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-11 15:16:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:16:58,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-11 15:16:58,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:16:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:59,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:16:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:16:59,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575163126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:16:59,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:16:59,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 30 [2024-11-11 15:16:59,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529312298] [2024-11-11 15:16:59,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:16:59,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-11 15:16:59,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:16:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-11 15:16:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-11-11 15:16:59,456 INFO L87 Difference]: Start difference. First operand 230 states and 306 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:00,210 INFO L93 Difference]: Finished difference Result 563 states and 768 transitions. [2024-11-11 15:17:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-11 15:17:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-11-11 15:17:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:00,215 INFO L225 Difference]: With dead ends: 563 [2024-11-11 15:17:00,216 INFO L226 Difference]: Without dead ends: 486 [2024-11-11 15:17:00,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-11 15:17:00,217 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 218 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:00,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1193 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 15:17:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2024-11-11 15:17:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 290. [2024-11-11 15:17:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 275 states have (on average 1.3709090909090909) internal successors, (377), 280 states have internal predecessors, (377), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:17:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 396 transitions. [2024-11-11 15:17:00,270 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 396 transitions. Word has length 47 [2024-11-11 15:17:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:00,271 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 396 transitions. [2024-11-11 15:17:00,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 396 transitions. [2024-11-11 15:17:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-11 15:17:00,272 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:00,272 INFO L218 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:00,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:00,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:00,475 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:00,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash 934067728, now seen corresponding path program 1 times [2024-11-11 15:17:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:00,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459837073] [2024-11-11 15:17:00,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:00,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:00,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-11 15:17:00,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:00,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459837073] [2024-11-11 15:17:00,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459837073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963632083] [2024-11-11 15:17:00,860 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:00,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:00,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:00,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-11 15:17:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:00,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-11 15:17:00,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:17:01,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 15:17:01,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963632083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:01,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:01,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2024-11-11 15:17:01,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652476094] [2024-11-11 15:17:01,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:01,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-11 15:17:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-11 15:17:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2024-11-11 15:17:01,301 INFO L87 Difference]: Start difference. First operand 290 states and 396 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:02,100 INFO L93 Difference]: Finished difference Result 567 states and 768 transitions. [2024-11-11 15:17:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-11 15:17:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-11-11 15:17:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:02,103 INFO L225 Difference]: With dead ends: 567 [2024-11-11 15:17:02,103 INFO L226 Difference]: Without dead ends: 405 [2024-11-11 15:17:02,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2024-11-11 15:17:02,104 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 166 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:02,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1105 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 15:17:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-11 15:17:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 246. [2024-11-11 15:17:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 231 states have (on average 1.3116883116883118) internal successors, (303), 236 states have internal predecessors, (303), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:17:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 322 transitions. [2024-11-11 15:17:02,150 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 322 transitions. Word has length 47 [2024-11-11 15:17:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:02,152 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 322 transitions. [2024-11-11 15:17:02,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 322 transitions. [2024-11-11 15:17:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-11 15:17:02,155 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:02,155 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:02,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-11 15:17:02,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-11 15:17:02,356 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:02,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1166880384, now seen corresponding path program 1 times [2024-11-11 15:17:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:02,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151257413] [2024-11-11 15:17:02,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:02,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:02,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:02,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-11 15:17:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 15:17:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151257413] [2024-11-11 15:17:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151257413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:17:02,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:17:02,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 15:17:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80572798] [2024-11-11 15:17:02,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:17:02,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 15:17:02,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 15:17:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:17:02,448 INFO L87 Difference]: Start difference. First operand 246 states and 322 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:02,516 INFO L93 Difference]: Finished difference Result 266 states and 346 transitions. [2024-11-11 15:17:02,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 15:17:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-11 15:17:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:02,518 INFO L225 Difference]: With dead ends: 266 [2024-11-11 15:17:02,518 INFO L226 Difference]: Without dead ends: 247 [2024-11-11 15:17:02,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:17:02,519 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:02,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 168 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:17:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-11 15:17:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2024-11-11 15:17:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 230 states have (on average 1.3043478260869565) internal successors, (300), 234 states have internal predecessors, (300), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:17:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 319 transitions. [2024-11-11 15:17:02,556 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 319 transitions. Word has length 50 [2024-11-11 15:17:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:02,556 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 319 transitions. [2024-11-11 15:17:02,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 319 transitions. [2024-11-11 15:17:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-11 15:17:02,557 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:02,557 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:02,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-11 15:17:02,558 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:02,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash -87216089, now seen corresponding path program 1 times [2024-11-11 15:17:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800904267] [2024-11-11 15:17:02,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:02,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:03,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:03,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 15:17:03,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800904267] [2024-11-11 15:17:03,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800904267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265906812] [2024-11-11 15:17:03,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:03,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:03,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:03,505 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:03,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-11 15:17:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:03,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-11 15:17:03,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:03,717 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 [2024-11-11 15:17:04,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-11 15:17:04,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-11 15:17:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 15:17:04,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:04,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:04,312 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 37 treesize of output 41 [2024-11-11 15:17:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 15:17:04,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265906812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:04,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:04,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 39 [2024-11-11 15:17:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126003974] [2024-11-11 15:17:04,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:04,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-11 15:17:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-11 15:17:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-11-11 15:17:04,492 INFO L87 Difference]: Start difference. First operand 245 states and 319 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:05,060 INFO L93 Difference]: Finished difference Result 372 states and 481 transitions. [2024-11-11 15:17:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-11 15:17:05,061 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2024-11-11 15:17:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:05,064 INFO L225 Difference]: With dead ends: 372 [2024-11-11 15:17:05,064 INFO L226 Difference]: Without dead ends: 282 [2024-11-11 15:17:05,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2024-11-11 15:17:05,065 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 96 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:05,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 865 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 15:17:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-11 15:17:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 256. [2024-11-11 15:17:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 241 states have (on average 1.2946058091286308) internal successors, (312), 245 states have internal predecessors, (312), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 15:17:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 331 transitions. [2024-11-11 15:17:05,108 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 331 transitions. Word has length 49 [2024-11-11 15:17:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:05,109 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 331 transitions. [2024-11-11 15:17:05,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 331 transitions. [2024-11-11 15:17:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-11 15:17:05,110 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:05,110 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:05,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-11 15:17:05,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:05,315 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:05,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:05,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1732577814, now seen corresponding path program 1 times [2024-11-11 15:17:05,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:05,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085234796] [2024-11-11 15:17:05,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:05,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:05,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:05,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:05,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-11 15:17:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:05,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-11 15:17:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-11 15:17:05,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085234796] [2024-11-11 15:17:05,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085234796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278852012] [2024-11-11 15:17:05,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:05,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:05,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:05,489 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:05,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-11 15:17:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:05,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-11 15:17:05,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 15:17:05,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 15:17:05,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278852012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:05,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:05,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-11 15:17:05,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252002132] [2024-11-11 15:17:05,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:05,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-11 15:17:05,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-11 15:17:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-11 15:17:05,785 INFO L87 Difference]: Start difference. First operand 256 states and 331 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-11 15:17:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:05,975 INFO L93 Difference]: Finished difference Result 295 states and 382 transitions. [2024-11-11 15:17:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 15:17:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 53 [2024-11-11 15:17:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:05,977 INFO L225 Difference]: With dead ends: 295 [2024-11-11 15:17:05,977 INFO L226 Difference]: Without dead ends: 231 [2024-11-11 15:17:05,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-11 15:17:05,978 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 20 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:05,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:17:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-11 15:17:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2024-11-11 15:17:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 211 states have (on average 1.3127962085308056) internal successors, (277), 214 states have internal predecessors, (277), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:17:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 294 transitions. [2024-11-11 15:17:06,026 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 294 transitions. Word has length 53 [2024-11-11 15:17:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:06,026 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 294 transitions. [2024-11-11 15:17:06,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-11 15:17:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 294 transitions. [2024-11-11 15:17:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-11 15:17:06,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:06,028 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:06,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:06,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:06,228 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:06,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash -655358406, now seen corresponding path program 2 times [2024-11-11 15:17:06,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:06,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157779408] [2024-11-11 15:17:06,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:06,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:06,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 15:17:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157779408] [2024-11-11 15:17:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157779408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23152926] [2024-11-11 15:17:06,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:17:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:06,624 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:06,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-11 15:17:06,725 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:17:06,726 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:06,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-11 15:17:06,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:17:06,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:17:07,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23152926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:07,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:07,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2024-11-11 15:17:07,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151512685] [2024-11-11 15:17:07,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:07,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-11 15:17:07,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-11 15:17:07,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-11-11 15:17:07,184 INFO L87 Difference]: Start difference. First operand 224 states and 294 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:08,005 INFO L93 Difference]: Finished difference Result 405 states and 532 transitions. [2024-11-11 15:17:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-11 15:17:08,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2024-11-11 15:17:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:08,008 INFO L225 Difference]: With dead ends: 405 [2024-11-11 15:17:08,008 INFO L226 Difference]: Without dead ends: 396 [2024-11-11 15:17:08,008 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1549, Unknown=0, NotChecked=0, Total=1806 [2024-11-11 15:17:08,009 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 165 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:08,010 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1331 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 15:17:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-11-11 15:17:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 198. [2024-11-11 15:17:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 185 states have (on average 1.2972972972972974) internal successors, (240), 188 states have internal predecessors, (240), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:17:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2024-11-11 15:17:08,050 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 53 [2024-11-11 15:17:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:08,050 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2024-11-11 15:17:08,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2024-11-11 15:17:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-11 15:17:08,053 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:08,053 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:08,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-11 15:17:08,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:08,254 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:08,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash -439774428, now seen corresponding path program 1 times [2024-11-11 15:17:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:08,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13810161] [2024-11-11 15:17:08,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:08,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:08,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:08,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-11 15:17:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:08,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-11 15:17:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-11 15:17:08,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:08,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13810161] [2024-11-11 15:17:08,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13810161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:08,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769021185] [2024-11-11 15:17:08,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:08,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:08,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:08,447 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:08,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-11 15:17:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:08,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-11 15:17:08,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 15:17:08,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-11 15:17:08,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769021185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:08,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:08,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-11 15:17:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360406273] [2024-11-11 15:17:08,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:08,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 15:17:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 15:17:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-11 15:17:08,774 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-11 15:17:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:09,061 INFO L93 Difference]: Finished difference Result 270 states and 349 transitions. [2024-11-11 15:17:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 15:17:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2024-11-11 15:17:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:09,063 INFO L225 Difference]: With dead ends: 270 [2024-11-11 15:17:09,063 INFO L226 Difference]: Without dead ends: 216 [2024-11-11 15:17:09,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-11 15:17:09,064 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:09,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 431 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:17:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-11 15:17:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 186. [2024-11-11 15:17:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 174 states have (on average 1.293103448275862) internal successors, (225), 177 states have internal predecessors, (225), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 240 transitions. [2024-11-11 15:17:09,097 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 240 transitions. Word has length 56 [2024-11-11 15:17:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:09,097 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 240 transitions. [2024-11-11 15:17:09,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-11 15:17:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 240 transitions. [2024-11-11 15:17:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-11 15:17:09,098 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:09,098 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:09,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-11 15:17:09,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-11 15:17:09,303 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:09,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2013657349, now seen corresponding path program 3 times [2024-11-11 15:17:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:09,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538759959] [2024-11-11 15:17:09,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:10,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:10,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 15:17:10,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:10,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538759959] [2024-11-11 15:17:10,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538759959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:10,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585626803] [2024-11-11 15:17:10,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:17:10,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:10,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:10,218 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:10,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-11 15:17:10,368 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 15:17:10,368 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:10,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-11 15:17:10,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:10,457 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 [2024-11-11 15:17:10,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-11 15:17:10,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-11 15:17:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 15:17:10,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:10,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:10,977 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 39 treesize of output 42 [2024-11-11 15:17:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-11 15:17:11,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585626803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:11,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:11,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 33 [2024-11-11 15:17:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775218352] [2024-11-11 15:17:11,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:11,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-11 15:17:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-11 15:17:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2024-11-11 15:17:11,099 INFO L87 Difference]: Start difference. First operand 186 states and 240 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:11,925 INFO L93 Difference]: Finished difference Result 332 states and 438 transitions. [2024-11-11 15:17:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-11 15:17:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2024-11-11 15:17:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:11,927 INFO L225 Difference]: With dead ends: 332 [2024-11-11 15:17:11,927 INFO L226 Difference]: Without dead ends: 283 [2024-11-11 15:17:11,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2024-11-11 15:17:11,928 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 132 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:11,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1433 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 15:17:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-11 15:17:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 210. [2024-11-11 15:17:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 198 states have (on average 1.297979797979798) internal successors, (257), 201 states have internal predecessors, (257), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 272 transitions. [2024-11-11 15:17:11,970 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 272 transitions. Word has length 54 [2024-11-11 15:17:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:11,970 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 272 transitions. [2024-11-11 15:17:11,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 272 transitions. [2024-11-11 15:17:11,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-11 15:17:11,972 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:11,972 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-11 15:17:11,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:12,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-11 15:17:12,177 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:12,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2082659085, now seen corresponding path program 1 times [2024-11-11 15:17:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:12,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884421397] [2024-11-11 15:17:12,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:12,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:12,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-11 15:17:12,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884421397] [2024-11-11 15:17:12,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884421397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466006562] [2024-11-11 15:17:12,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:12,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:12,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:12,423 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:12,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-11 15:17:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:12,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-11 15:17:12,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-11 15:17:12,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-11 15:17:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466006562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:12,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:12,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-11-11 15:17:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660226276] [2024-11-11 15:17:12,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:12,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-11 15:17:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-11 15:17:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-11 15:17:12,879 INFO L87 Difference]: Start difference. First operand 210 states and 272 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:13,210 INFO L93 Difference]: Finished difference Result 457 states and 595 transitions. [2024-11-11 15:17:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 15:17:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-11 15:17:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:13,213 INFO L225 Difference]: With dead ends: 457 [2024-11-11 15:17:13,213 INFO L226 Difference]: Without dead ends: 421 [2024-11-11 15:17:13,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-11-11 15:17:13,214 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 57 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:13,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1059 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:17:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-11 15:17:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 253. [2024-11-11 15:17:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 241 states have (on average 1.3070539419087137) internal successors, (315), 244 states have internal predecessors, (315), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 330 transitions. [2024-11-11 15:17:13,263 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 330 transitions. Word has length 54 [2024-11-11 15:17:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:13,264 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 330 transitions. [2024-11-11 15:17:13,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 330 transitions. [2024-11-11 15:17:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-11 15:17:13,265 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:13,265 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2024-11-11 15:17:13,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:13,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:13,470 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:13,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -533951995, now seen corresponding path program 3 times [2024-11-11 15:17:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:13,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900765152] [2024-11-11 15:17:13,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:13,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:13,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 15:17:13,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:13,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900765152] [2024-11-11 15:17:13,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900765152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:13,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028573992] [2024-11-11 15:17:13,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:17:13,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:13,642 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:13,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-11 15:17:13,889 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-11 15:17:13,890 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:13,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-11 15:17:13,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 15:17:14,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 15:17:14,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028573992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:14,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:14,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-11 15:17:14,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112682474] [2024-11-11 15:17:14,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:14,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-11 15:17:14,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:14,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-11 15:17:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-11 15:17:14,218 INFO L87 Difference]: Start difference. First operand 253 states and 330 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:14,549 INFO L93 Difference]: Finished difference Result 364 states and 465 transitions. [2024-11-11 15:17:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-11 15:17:14,550 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2024-11-11 15:17:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:14,552 INFO L225 Difference]: With dead ends: 364 [2024-11-11 15:17:14,552 INFO L226 Difference]: Without dead ends: 285 [2024-11-11 15:17:14,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-11 15:17:14,553 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 38 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:14,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1017 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:17:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-11 15:17:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 253. [2024-11-11 15:17:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 241 states have (on average 1.2946058091286308) internal successors, (312), 244 states have internal predecessors, (312), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 327 transitions. [2024-11-11 15:17:14,596 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 327 transitions. Word has length 55 [2024-11-11 15:17:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:14,596 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 327 transitions. [2024-11-11 15:17:14,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 327 transitions. [2024-11-11 15:17:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-11 15:17:14,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:14,598 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-11 15:17:14,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:14,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:14,798 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:14,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash 82386923, now seen corresponding path program 2 times [2024-11-11 15:17:14,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:14,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187830646] [2024-11-11 15:17:14,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:14,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:15,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:15,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 15:17:15,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:15,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187830646] [2024-11-11 15:17:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187830646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:15,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694050102] [2024-11-11 15:17:15,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:17:15,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:15,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:15,199 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:15,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-11 15:17:15,324 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:17:15,325 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:15,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-11 15:17:15,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 15:17:15,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-11 15:17:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694050102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:15,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:15,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 27 [2024-11-11 15:17:15,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89488169] [2024-11-11 15:17:15,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:15,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-11 15:17:15,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-11 15:17:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-11-11 15:17:15,766 INFO L87 Difference]: Start difference. First operand 253 states and 327 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:16,406 INFO L93 Difference]: Finished difference Result 416 states and 541 transitions. [2024-11-11 15:17:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-11 15:17:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2024-11-11 15:17:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:16,409 INFO L225 Difference]: With dead ends: 416 [2024-11-11 15:17:16,409 INFO L226 Difference]: Without dead ends: 320 [2024-11-11 15:17:16,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2024-11-11 15:17:16,410 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 302 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:16,410 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1092 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 15:17:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-11 15:17:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 236. [2024-11-11 15:17:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.28125) internal successors, (287), 227 states have internal predecessors, (287), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 302 transitions. [2024-11-11 15:17:16,455 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 302 transitions. Word has length 56 [2024-11-11 15:17:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:16,455 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 302 transitions. [2024-11-11 15:17:16,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 15:17:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 302 transitions. [2024-11-11 15:17:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-11 15:17:16,456 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:16,456 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:16,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:16,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:16,657 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:16,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1120440094, now seen corresponding path program 1 times [2024-11-11 15:17:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201361209] [2024-11-11 15:17:16,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:17,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:17,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:17,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-11 15:17:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:17,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-11 15:17:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 15:17:17,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201361209] [2024-11-11 15:17:17,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201361209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614981304] [2024-11-11 15:17:17,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:17,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:17,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:17,247 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:17,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-11 15:17:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:17,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-11 15:17:17,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:21,547 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) 0) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) 0))) is different from true [2024-11-11 15:17:21,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 15:17:21,661 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 [2024-11-11 15:17:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 15:17:21,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:21,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:21,869 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 39 [2024-11-11 15:17:21,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:21,878 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 [2024-11-11 15:17:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 15:17:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614981304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:21,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 32 [2024-11-11 15:17:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170339927] [2024-11-11 15:17:21,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:21,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-11 15:17:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-11 15:17:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=839, Unknown=1, NotChecked=58, Total=992 [2024-11-11 15:17:21,958 INFO L87 Difference]: Start difference. First operand 236 states and 302 transitions. Second operand has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-11 15:17:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:23,822 INFO L93 Difference]: Finished difference Result 377 states and 483 transitions. [2024-11-11 15:17:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-11 15:17:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 59 [2024-11-11 15:17:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:23,825 INFO L225 Difference]: With dead ends: 377 [2024-11-11 15:17:23,825 INFO L226 Difference]: Without dead ends: 338 [2024-11-11 15:17:23,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=376, Invalid=2707, Unknown=1, NotChecked=108, Total=3192 [2024-11-11 15:17:23,827 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 176 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:23,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1300 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1221 Invalid, 0 Unknown, 317 Unchecked, 0.7s Time] [2024-11-11 15:17:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-11 15:17:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 252. [2024-11-11 15:17:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 238 states have (on average 1.2563025210084033) internal successors, (299), 241 states have internal predecessors, (299), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:17:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 316 transitions. [2024-11-11 15:17:23,895 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 316 transitions. Word has length 59 [2024-11-11 15:17:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:23,895 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 316 transitions. [2024-11-11 15:17:23,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-11 15:17:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 316 transitions. [2024-11-11 15:17:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-11 15:17:23,896 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:23,896 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-11 15:17:23,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-11 15:17:24,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-11 15:17:24,101 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:24,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1581348927, now seen corresponding path program 4 times [2024-11-11 15:17:24,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:24,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008265085] [2024-11-11 15:17:24,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:24,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:24,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:24,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 15:17:24,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:24,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008265085] [2024-11-11 15:17:24,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008265085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:24,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102106616] [2024-11-11 15:17:24,587 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:17:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:24,588 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:24,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-11 15:17:24,770 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:17:24,770 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:24,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-11 15:17:24,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 15:17:25,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:17:25,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102106616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:25,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:25,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 41 [2024-11-11 15:17:25,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002422709] [2024-11-11 15:17:25,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:25,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-11 15:17:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-11 15:17:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2024-11-11 15:17:25,744 INFO L87 Difference]: Start difference. First operand 252 states and 316 transitions. Second operand has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:27,674 INFO L93 Difference]: Finished difference Result 524 states and 668 transitions. [2024-11-11 15:17:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-11 15:17:27,675 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-11-11 15:17:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:27,677 INFO L225 Difference]: With dead ends: 524 [2024-11-11 15:17:27,677 INFO L226 Difference]: Without dead ends: 439 [2024-11-11 15:17:27,679 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=510, Invalid=3912, Unknown=0, NotChecked=0, Total=4422 [2024-11-11 15:17:27,679 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 360 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:27,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1593 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-11 15:17:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-11-11 15:17:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 318. [2024-11-11 15:17:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 304 states have (on average 1.2894736842105263) internal successors, (392), 307 states have internal predecessors, (392), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 15:17:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 409 transitions. [2024-11-11 15:17:27,746 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 409 transitions. Word has length 57 [2024-11-11 15:17:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:27,746 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 409 transitions. [2024-11-11 15:17:27,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 409 transitions. [2024-11-11 15:17:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-11 15:17:27,747 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:27,748 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-11 15:17:27,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:27,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-11 15:17:27,948 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:27,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1906541026, now seen corresponding path program 1 times [2024-11-11 15:17:27,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:27,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195871343] [2024-11-11 15:17:27,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:27,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:28,524 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:28,526 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:28,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-11 15:17:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:28,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-11 15:17:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 15:17:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195871343] [2024-11-11 15:17:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195871343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400064742] [2024-11-11 15:17:28,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:28,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:28,538 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:28,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-11 15:17:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:28,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-11 15:17:28,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 15:17:28,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-11 15:17:29,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400064742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:29,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:29,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 32 [2024-11-11 15:17:29,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472833692] [2024-11-11 15:17:29,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:29,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-11 15:17:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-11 15:17:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2024-11-11 15:17:29,153 INFO L87 Difference]: Start difference. First operand 318 states and 409 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-11 15:17:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:31,092 INFO L93 Difference]: Finished difference Result 777 states and 1008 transitions. [2024-11-11 15:17:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-11 15:17:31,093 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-11-11 15:17:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:31,095 INFO L225 Difference]: With dead ends: 777 [2024-11-11 15:17:31,095 INFO L226 Difference]: Without dead ends: 696 [2024-11-11 15:17:31,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=682, Invalid=5018, Unknown=0, NotChecked=0, Total=5700 [2024-11-11 15:17:31,096 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 510 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:31,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 1216 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-11 15:17:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2024-11-11 15:17:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 337. [2024-11-11 15:17:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 324 states have (on average 1.2746913580246915) internal successors, (413), 326 states have internal predecessors, (413), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 428 transitions. [2024-11-11 15:17:31,174 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 428 transitions. Word has length 60 [2024-11-11 15:17:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:31,174 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 428 transitions. [2024-11-11 15:17:31,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-11 15:17:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 428 transitions. [2024-11-11 15:17:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-11 15:17:31,175 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:31,175 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-11 15:17:31,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:31,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-11 15:17:31,375 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:31,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1648021462, now seen corresponding path program 3 times [2024-11-11 15:17:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:31,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803111143] [2024-11-11 15:17:31,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:31,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:32,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:32,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:17:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803111143] [2024-11-11 15:17:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803111143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809236122] [2024-11-11 15:17:32,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:17:32,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:32,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:32,512 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:32,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-11 15:17:32,815 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 15:17:32,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:32,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-11 15:17:32,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:33,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 15:17:33,356 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 [2024-11-11 15:17:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 15:17:33,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:33,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:33,623 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 39 [2024-11-11 15:17:33,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:33,633 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 [2024-11-11 15:17:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-11 15:17:33,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809236122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:33,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:33,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 9] total 37 [2024-11-11 15:17:33,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319940196] [2024-11-11 15:17:33,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:33,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-11 15:17:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-11 15:17:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 15:17:33,749 INFO L87 Difference]: Start difference. First operand 337 states and 428 transitions. Second operand has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:35,192 INFO L93 Difference]: Finished difference Result 610 states and 788 transitions. [2024-11-11 15:17:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-11 15:17:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-11 15:17:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:35,195 INFO L225 Difference]: With dead ends: 610 [2024-11-11 15:17:35,195 INFO L226 Difference]: Without dead ends: 478 [2024-11-11 15:17:35,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2024-11-11 15:17:35,197 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 264 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:35,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 880 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 15:17:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2024-11-11 15:17:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 345. [2024-11-11 15:17:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 332 states have (on average 1.2620481927710843) internal successors, (419), 334 states have internal predecessors, (419), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 434 transitions. [2024-11-11 15:17:35,298 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 434 transitions. Word has length 59 [2024-11-11 15:17:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:35,299 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 434 transitions. [2024-11-11 15:17:35,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 434 transitions. [2024-11-11 15:17:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-11 15:17:35,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:35,300 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-11 15:17:35,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-11 15:17:35,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:35,501 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:35,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 109992346, now seen corresponding path program 4 times [2024-11-11 15:17:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:35,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714016414] [2024-11-11 15:17:35,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:35,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:36,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:36,505 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:17:36,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:36,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714016414] [2024-11-11 15:17:36,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714016414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:36,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443909640] [2024-11-11 15:17:36,507 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:17:36,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:36,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:36,511 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:36,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-11 15:17:36,641 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:17:36,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:36,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-11 15:17:36,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:36,775 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 [2024-11-11 15:17:37,344 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 24 treesize of output 12 [2024-11-11 15:17:37,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-11 15:17:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:17:37,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:37,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:37,832 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 39 treesize of output 42 [2024-11-11 15:17:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-11 15:17:38,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443909640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:38,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:38,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 17] total 56 [2024-11-11 15:17:38,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213840593] [2024-11-11 15:17:38,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:38,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-11 15:17:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-11 15:17:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2818, Unknown=0, NotChecked=0, Total=3080 [2024-11-11 15:17:38,059 INFO L87 Difference]: Start difference. First operand 345 states and 434 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:39,924 INFO L93 Difference]: Finished difference Result 466 states and 588 transitions. [2024-11-11 15:17:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-11 15:17:39,925 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-11 15:17:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:39,927 INFO L225 Difference]: With dead ends: 466 [2024-11-11 15:17:39,927 INFO L226 Difference]: Without dead ends: 425 [2024-11-11 15:17:39,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=641, Invalid=6001, Unknown=0, NotChecked=0, Total=6642 [2024-11-11 15:17:39,929 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 255 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:39,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1021 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-11 15:17:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-11-11 15:17:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 357. [2024-11-11 15:17:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 344 states have (on average 1.252906976744186) internal successors, (431), 346 states have internal predecessors, (431), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 446 transitions. [2024-11-11 15:17:40,032 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 446 transitions. Word has length 59 [2024-11-11 15:17:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:40,032 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 446 transitions. [2024-11-11 15:17:40,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 15:17:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 446 transitions. [2024-11-11 15:17:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-11 15:17:40,033 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:40,034 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-11 15:17:40,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:40,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-11 15:17:40,234 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:40,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:40,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1040499838, now seen corresponding path program 5 times [2024-11-11 15:17:40,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:40,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383961816] [2024-11-11 15:17:40,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:40,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:41,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:41,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:17:41,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:41,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383961816] [2024-11-11 15:17:41,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383961816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:41,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517048579] [2024-11-11 15:17:41,198 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 15:17:41,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:41,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:41,199 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:41,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-11 15:17:41,423 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-11 15:17:41,423 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:17:41,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-11 15:17:41,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:41,568 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 [2024-11-11 15:17:42,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-11 15:17:42,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-11 15:17:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-11 15:17:42,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:42,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:42,947 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 39 treesize of output 42 [2024-11-11 15:17:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-11 15:17:43,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517048579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:43,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:43,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 19] total 55 [2024-11-11 15:17:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660635328] [2024-11-11 15:17:43,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:43,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-11 15:17:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-11 15:17:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2024-11-11 15:17:43,274 INFO L87 Difference]: Start difference. First operand 357 states and 446 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 53 states have internal predecessors, (120), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 15:17:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:44,685 INFO L93 Difference]: Finished difference Result 545 states and 689 transitions. [2024-11-11 15:17:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-11 15:17:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 53 states have internal predecessors, (120), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-11-11 15:17:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:44,687 INFO L225 Difference]: With dead ends: 545 [2024-11-11 15:17:44,687 INFO L226 Difference]: Without dead ends: 424 [2024-11-11 15:17:44,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=448, Invalid=3974, Unknown=0, NotChecked=0, Total=4422 [2024-11-11 15:17:44,687 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 150 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:44,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1085 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 15:17:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-11-11 15:17:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 381. [2024-11-11 15:17:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 368 states have (on average 1.252717391304348) internal successors, (461), 370 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 15:17:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 476 transitions. [2024-11-11 15:17:44,786 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 476 transitions. Word has length 59 [2024-11-11 15:17:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:44,786 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 476 transitions. [2024-11-11 15:17:44,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 53 states have internal predecessors, (120), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 15:17:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 476 transitions. [2024-11-11 15:17:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-11 15:17:44,788 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:44,788 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:17:44,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-11 15:17:44,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-11 15:17:44,989 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:44,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:44,989 INFO L85 PathProgramCache]: Analyzing trace with hash 86836948, now seen corresponding path program 1 times [2024-11-11 15:17:44,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:44,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462830663] [2024-11-11 15:17:44,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:45,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:17:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:45,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:17:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:45,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 15:17:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:45,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-11 15:17:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 15:17:45,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:17:45,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462830663] [2024-11-11 15:17:45,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462830663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:17:45,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395326845] [2024-11-11 15:17:45,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:45,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:17:45,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:17:45,562 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:17:45,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-11 15:17:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:17:45,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-11 15:17:45,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:17:45,699 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 [2024-11-11 15:17:46,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 15:17:46,018 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 [2024-11-11 15:17:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 15:17:46,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:17:46,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:17:46,192 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 37 treesize of output 41 [2024-11-11 15:17:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-11 15:17:46,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395326845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:17:46,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:17:46,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 29 [2024-11-11 15:17:46,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015106576] [2024-11-11 15:17:46,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:17:46,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-11 15:17:46,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:17:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-11 15:17:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-11 15:17:46,335 INFO L87 Difference]: Start difference. First operand 381 states and 476 transitions. Second operand has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-11 15:17:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:17:47,291 INFO L93 Difference]: Finished difference Result 640 states and 809 transitions. [2024-11-11 15:17:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-11 15:17:47,292 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 63 [2024-11-11 15:17:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:17:47,294 INFO L225 Difference]: With dead ends: 640 [2024-11-11 15:17:47,294 INFO L226 Difference]: Without dead ends: 519 [2024-11-11 15:17:47,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 15:17:47,295 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 121 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 15:17:47,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1266 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 15:17:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-11 15:17:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 496. [2024-11-11 15:17:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 472 states have (on average 1.2542372881355932) internal successors, (592), 477 states have internal predecessors, (592), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-11 15:17:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 620 transitions. [2024-11-11 15:17:47,429 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 620 transitions. Word has length 63 [2024-11-11 15:17:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:17:47,430 INFO L471 AbstractCegarLoop]: Abstraction has 496 states and 620 transitions. [2024-11-11 15:17:47,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-11 15:17:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 620 transitions. [2024-11-11 15:17:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-11 15:17:47,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:17:47,431 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-11 15:17:47,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-11 15:17:47,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-11 15:17:47,632 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:17:47,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:17:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1379912645, now seen corresponding path program 5 times [2024-11-11 15:17:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:17:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830105374] [2024-11-11 15:17:47,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:17:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:17:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat