./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 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-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-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:16:53,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:16:53,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:16:53,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:16:53,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:16:53,130 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:16:53,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:16:53,131 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:16:53,132 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:16:53,133 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:16:53,134 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:16:53,134 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:16:53,135 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:16:53,135 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:16:53,137 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:16:53,138 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:16:53,138 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:16:53,138 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:16:53,139 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:16:53,139 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:16:53,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:16:53,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:16:53,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:16:53,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:16:53,145 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:16:53,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:16:53,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:16:53,145 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:16:53,146 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:16:53,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:16:53,146 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:16:53,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:16:53,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:16:53,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:16:53,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:16:53,148 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:16:53,148 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:16:53,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:16:53,149 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:16:53,149 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:16:53,149 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:16:53,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:16:53,150 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2024-11-16 02:16:53,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:16:53,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:16:53,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:16:53,455 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:16:53,455 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:16:53,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-16 02:16:54,952 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:16:55,192 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:16:55,192 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-16 02:16:55,206 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c99756f0/bbbb8a8cfc134d1eb644558b8a2808a2/FLAG8d861b8df [2024-11-16 02:16:55,532 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c99756f0/bbbb8a8cfc134d1eb644558b8a2808a2 [2024-11-16 02:16:55,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:16:55,536 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:16:55,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:16:55,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:16:55,544 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:16:55,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:16:55" (1/1) ... [2024-11-16 02:16:55,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8321a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:55, skipping insertion in model container [2024-11-16 02:16:55,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:16:55" (1/1) ... [2024-11-16 02:16:55,588 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:16:55,811 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] [2024-11-16 02:16:55,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:16:56,010 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:16:56,026 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] [2024-11-16 02:16:56,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:16:56,106 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:16:56,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56 WrapperNode [2024-11-16 02:16:56,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:16:56,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:16:56,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:16:56,108 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:16:56,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,158 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 135 [2024-11-16 02:16:56,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:16:56,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:16:56,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:16:56,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:16:56,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,176 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,197 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]. [2024-11-16 02:16:56,198 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,198 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,205 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:16:56,213 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:16:56,214 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:16:56,214 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:16:56,215 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (1/1) ... [2024-11-16 02:16:56,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:16:56,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:16:56,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:16:56,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:16:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:16:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:16:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:16:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 02:16:56,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 02:16:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:16:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:16:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:16:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-16 02:16:56,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-16 02:16:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 02:16:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:16:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:16:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:16:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:16:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:16:56,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:16:56,457 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:16:56,459 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:16:56,787 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-16 02:16:56,788 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:16:56,803 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:16:56,804 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:16:56,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:16:56 BoogieIcfgContainer [2024-11-16 02:16:56,805 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:16:56,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:16:56,807 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:16:56,812 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:16:56,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:16:55" (1/3) ... [2024-11-16 02:16:56,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:16:56, skipping insertion in model container [2024-11-16 02:16:56,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:16:56" (2/3) ... [2024-11-16 02:16:56,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:16:56, skipping insertion in model container [2024-11-16 02:16:56,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:16:56" (3/3) ... [2024-11-16 02:16:56,820 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-11-16 02:16:56,838 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:16:56,839 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:16:56,907 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:16:56,913 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;@c31660b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:16:56,913 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:16:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 49 states have (on average 1.510204081632653) internal successors, (74), 53 states have internal predecessors, (74), 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) [2024-11-16 02:16:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-16 02:16:56,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:16:56,928 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:16:56,929 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:16:56,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:16:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2011636610, now seen corresponding path program 1 times [2024-11-16 02:16:56,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:16:56,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654171883] [2024-11-16 02:16:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:16:56,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:16:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:57,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:16:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:57,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:16:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:16:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:16:57,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654171883] [2024-11-16 02:16:57,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654171883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:16:57,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:16:57,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:16:57,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564595816] [2024-11-16 02:16:57,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:16:57,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:16:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:16:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:16:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:16:57,236 INFO L87 Difference]: Start difference. First operand has 60 states, 49 states have (on average 1.510204081632653) internal successors, (74), 53 states have internal predecessors, (74), 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 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2024-11-16 02:16:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:16:57,257 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2024-11-16 02:16:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:16:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 25 [2024-11-16 02:16:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:16:57,270 INFO L225 Difference]: With dead ends: 116 [2024-11-16 02:16:57,271 INFO L226 Difference]: Without dead ends: 53 [2024-11-16 02:16:57,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:16:57,278 INFO L432 NwaCegarLoop]: 80 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, 80 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:16:57,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:16:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-16 02:16:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-16 02:16:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.372093023255814) internal successors, (59), 47 states have internal predecessors, (59), 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) [2024-11-16 02:16:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-11-16 02:16:57,316 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 25 [2024-11-16 02:16:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:16:57,316 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-11-16 02:16:57,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2024-11-16 02:16:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-11-16 02:16:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-16 02:16:57,318 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:16:57,318 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:16:57,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:16:57,320 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:16:57,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:16:57,321 INFO L85 PathProgramCache]: Analyzing trace with hash 694216355, now seen corresponding path program 1 times [2024-11-16 02:16:57,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:16:57,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659116216] [2024-11-16 02:16:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:16:57,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:16:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:57,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:16:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:57,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:16:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:16:57,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:16:57,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659116216] [2024-11-16 02:16:57,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659116216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:16:57,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:16:57,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 02:16:57,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578880827] [2024-11-16 02:16:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:16:57,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:16:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:16:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:16:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:16:57,621 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-11-16 02:16:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:16:57,699 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2024-11-16 02:16:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:16:57,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 [2024-11-16 02:16:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:16:57,705 INFO L225 Difference]: With dead ends: 79 [2024-11-16 02:16:57,707 INFO L226 Difference]: Without dead ends: 55 [2024-11-16 02:16:57,708 INFO L431 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 [2024-11-16 02:16:57,713 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:16:57,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:16:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-16 02:16:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-16 02:16:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 49 states have internal predecessors, (61), 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) [2024-11-16 02:16:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2024-11-16 02:16:57,752 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 27 [2024-11-16 02:16:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:16:57,757 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2024-11-16 02:16:57,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-11-16 02:16:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2024-11-16 02:16:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-16 02:16:57,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:16:57,758 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:16:57,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:16:57,765 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:16:57,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:16:57,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1696020411, now seen corresponding path program 1 times [2024-11-16 02:16:57,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:16:57,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125491627] [2024-11-16 02:16:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:16:57,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:16:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:58,077 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:16:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:58,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:16:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:16:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:16:58,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125491627] [2024-11-16 02:16:58,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125491627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:16:58,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:16:58,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 02:16:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746887553] [2024-11-16 02:16:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:16:58,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 02:16:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:16:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 02:16:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-16 02:16:58,098 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2024-11-16 02:16:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:16:58,233 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2024-11-16 02:16:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 02:16:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 [2024-11-16 02:16:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:16:58,236 INFO L225 Difference]: With dead ends: 116 [2024-11-16 02:16:58,237 INFO L226 Difference]: Without dead ends: 78 [2024-11-16 02:16:58,238 INFO L431 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 [2024-11-16 02:16:58,239 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 21 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:16:58,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 299 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:16:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-16 02:16:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2024-11-16 02:16:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 70 states have internal predecessors, (89), 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) [2024-11-16 02:16:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2024-11-16 02:16:58,257 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 31 [2024-11-16 02:16:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:16:58,258 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2024-11-16 02:16:58,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2024-11-16 02:16:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2024-11-16 02:16:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 02:16:58,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:16:58,259 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:16:58,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 02:16:58,259 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:16:58,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:16:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1112134640, now seen corresponding path program 1 times [2024-11-16 02:16:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:16:58,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797184652] [2024-11-16 02:16:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:16:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:16:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:58,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:16:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:58,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:16:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:16:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:16:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797184652] [2024-11-16 02:16:58,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797184652] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:16:58,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:16:58,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-16 02:16:58,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419433037] [2024-11-16 02:16:58,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:16:58,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 02:16:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:16:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 02:16:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 02:16:58,697 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2024-11-16 02:16:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:16:58,890 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2024-11-16 02:16:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:16:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 32 [2024-11-16 02:16:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:16:58,893 INFO L225 Difference]: With dead ends: 120 [2024-11-16 02:16:58,893 INFO L226 Difference]: Without dead ends: 105 [2024-11-16 02:16:58,893 INFO L431 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 [2024-11-16 02:16:58,896 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 74 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:16:58,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 332 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:16:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-16 02:16:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2024-11-16 02:16:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 77 states have (on average 1.3506493506493507) internal successors, (104), 81 states have internal predecessors, (104), 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) [2024-11-16 02:16:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2024-11-16 02:16:58,918 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 32 [2024-11-16 02:16:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:16:58,918 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2024-11-16 02:16:58,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2024-11-16 02:16:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2024-11-16 02:16:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 02:16:58,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:16:58,920 INFO L215 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] [2024-11-16 02:16:58,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 02:16:58,920 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:16:58,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:16:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1749834500, now seen corresponding path program 1 times [2024-11-16 02:16:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:16:58,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901726618] [2024-11-16 02:16:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:16:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:16:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:59,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:16:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:59,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:16:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:16:59,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:16:59,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901726618] [2024-11-16 02:16:59,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901726618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:16:59,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103768848] [2024-11-16 02:16:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:16:59,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:16:59,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:16:59,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:16:59,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:16:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:16:59,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-16 02:16:59,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:16:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:16:59,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:16:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:16:59,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103768848] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 02:16:59,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:16:59,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 9] total 16 [2024-11-16 02:16:59,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056398852] [2024-11-16 02:16:59,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:16:59,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 02:17:00,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 02:17:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-16 02:17:00,005 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-16 02:17:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:00,087 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2024-11-16 02:17:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 02:17:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 [2024-11-16 02:17:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:00,092 INFO L225 Difference]: With dead ends: 100 [2024-11-16 02:17:00,092 INFO L226 Difference]: Without dead ends: 97 [2024-11-16 02:17:00,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:17:00,093 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 31 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:00,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 226 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-16 02:17:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2024-11-16 02:17:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 80 states have (on average 1.3375) internal successors, (107), 84 states have internal predecessors, (107), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:17:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2024-11-16 02:17:00,103 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 33 [2024-11-16 02:17:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:00,103 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2024-11-16 02:17:00,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-16 02:17:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2024-11-16 02:17:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-16 02:17:00,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:00,105 INFO L215 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] [2024-11-16 02:17:00,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:17:00,305 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 [2024-11-16 02:17:00,306 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:00,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:00,307 INFO L85 PathProgramCache]: Analyzing trace with hash -991413969, now seen corresponding path program 1 times [2024-11-16 02:17:00,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:00,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870020389] [2024-11-16 02:17:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:00,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:00,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:00,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:17:00,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:00,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870020389] [2024-11-16 02:17:00,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870020389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:00,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:00,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:17:00,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412610979] [2024-11-16 02:17:00,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:00,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:17:00,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:17:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:17:00,519 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2024-11-16 02:17:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:00,594 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2024-11-16 02:17:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:17:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 34 [2024-11-16 02:17:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:00,598 INFO L225 Difference]: With dead ends: 114 [2024-11-16 02:17:00,599 INFO L226 Difference]: Without dead ends: 85 [2024-11-16 02:17:00,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:17:00,600 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 11 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:00,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 251 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-16 02:17:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2024-11-16 02:17:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 70 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:17:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-11-16 02:17:00,614 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 34 [2024-11-16 02:17:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:00,615 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-11-16 02:17:00,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2024-11-16 02:17:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-11-16 02:17:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-16 02:17:00,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:00,616 INFO L215 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] [2024-11-16 02:17:00,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 02:17:00,616 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:00,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1693443950, now seen corresponding path program 1 times [2024-11-16 02:17:00,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:00,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106458986] [2024-11-16 02:17:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:00,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:00,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:00,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106458986] [2024-11-16 02:17:00,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106458986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765819715] [2024-11-16 02:17:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:00,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:00,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:00,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:17:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:01,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-16 02:17:01,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:01,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:01,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765819715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:01,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:01,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12] total 23 [2024-11-16 02:17:01,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556950391] [2024-11-16 02:17:01,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:01,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 02:17:01,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 02:17:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:17:01,786 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2024-11-16 02:17:05,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 02:17:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:05,871 INFO L93 Difference]: Finished difference Result 224 states and 301 transitions. [2024-11-16 02:17:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 02:17:05,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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 34 [2024-11-16 02:17:05,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:05,873 INFO L225 Difference]: With dead ends: 224 [2024-11-16 02:17:05,873 INFO L226 Difference]: Without dead ends: 171 [2024-11-16 02:17:05,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 02:17:05,875 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 320 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:05,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1144 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-16 02:17:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-16 02:17:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2024-11-16 02:17:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 115 states have (on average 1.2956521739130435) internal successors, (149), 120 states have internal predecessors, (149), 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) [2024-11-16 02:17:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2024-11-16 02:17:05,900 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 34 [2024-11-16 02:17:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:05,901 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2024-11-16 02:17:05,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2024-11-16 02:17:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2024-11-16 02:17:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 02:17:05,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:05,902 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:05,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:17:06,103 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 [2024-11-16 02:17:06,103 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:06,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash 795082670, now seen corresponding path program 1 times [2024-11-16 02:17:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:06,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386465906] [2024-11-16 02:17:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:06,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386465906] [2024-11-16 02:17:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386465906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:06,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 02:17:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710395400] [2024-11-16 02:17:06,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:06,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:17:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:17:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:17:06,188 INFO L87 Difference]: Start difference. First operand 129 states and 166 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-11-16 02:17:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:06,211 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2024-11-16 02:17:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:17:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 36 [2024-11-16 02:17:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:06,213 INFO L225 Difference]: With dead ends: 151 [2024-11-16 02:17:06,213 INFO L226 Difference]: Without dead ends: 113 [2024-11-16 02:17:06,213 INFO L431 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 [2024-11-16 02:17:06,216 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:06,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-16 02:17:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-16 02:17:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 104 states have internal predecessors, (127), 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) [2024-11-16 02:17:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 144 transitions. [2024-11-16 02:17:06,230 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 144 transitions. Word has length 36 [2024-11-16 02:17:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:06,230 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 144 transitions. [2024-11-16 02:17:06,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-11-16 02:17:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 144 transitions. [2024-11-16 02:17:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 02:17:06,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:06,231 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-16 02:17:06,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 02:17:06,231 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:06,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -243132045, now seen corresponding path program 2 times [2024-11-16 02:17:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699319101] [2024-11-16 02:17:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699319101] [2024-11-16 02:17:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699319101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857351398] [2024-11-16 02:17:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:17:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:06,507 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) [2024-11-16 02:17:06,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:17:06,606 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-16 02:17:06,606 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:06,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 02:17:06,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 02:17:06,717 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:17:06,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857351398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:06,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:17:06,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-11-16 02:17:06,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940186736] [2024-11-16 02:17:06,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:06,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 02:17:06,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 02:17:06,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:17:06,719 INFO L87 Difference]: Start difference. First operand 113 states and 144 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2024-11-16 02:17:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:06,810 INFO L93 Difference]: Finished difference Result 193 states and 244 transitions. [2024-11-16 02:17:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 02:17:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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 36 [2024-11-16 02:17:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:06,811 INFO L225 Difference]: With dead ends: 193 [2024-11-16 02:17:06,812 INFO L226 Difference]: Without dead ends: 135 [2024-11-16 02:17:06,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:17:06,813 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 18 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:06,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 257 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-16 02:17:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2024-11-16 02:17:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 112 states have (on average 1.2589285714285714) internal successors, (141), 117 states have internal predecessors, (141), 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) [2024-11-16 02:17:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2024-11-16 02:17:06,822 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 36 [2024-11-16 02:17:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:06,822 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2024-11-16 02:17:06,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2024-11-16 02:17:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2024-11-16 02:17:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-16 02:17:06,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:06,823 INFO L215 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] [2024-11-16 02:17:06,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 02:17:07,027 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 [2024-11-16 02:17:07,028 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:07,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash -761370962, now seen corresponding path program 1 times [2024-11-16 02:17:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:07,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594884532] [2024-11-16 02:17:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:07,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,077 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:17:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594884532] [2024-11-16 02:17:07,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594884532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:07,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:07,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 02:17:07,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589615199] [2024-11-16 02:17:07,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:07,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:17:07,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:17:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 02:17:07,085 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2024-11-16 02:17:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:07,112 INFO L93 Difference]: Finished difference Result 171 states and 217 transitions. [2024-11-16 02:17:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:17:07,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 38 [2024-11-16 02:17:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:07,116 INFO L225 Difference]: With dead ends: 171 [2024-11-16 02:17:07,116 INFO L226 Difference]: Without dead ends: 130 [2024-11-16 02:17:07,118 INFO L431 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 [2024-11-16 02:17:07,118 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 133 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 [2024-11-16 02:17:07,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 133 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-16 02:17:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-16 02:17:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 121 states have internal predecessors, (149), 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) [2024-11-16 02:17:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2024-11-16 02:17:07,148 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 38 [2024-11-16 02:17:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:07,148 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2024-11-16 02:17:07,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2024-11-16 02:17:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2024-11-16 02:17:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-16 02:17:07,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:07,149 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-16 02:17:07,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 02:17:07,150 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:07,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1208741520, now seen corresponding path program 1 times [2024-11-16 02:17:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:07,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509055562] [2024-11-16 02:17:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,267 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:17:07,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:07,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509055562] [2024-11-16 02:17:07,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509055562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:07,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106761852] [2024-11-16 02:17:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:07,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:07,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:07,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:17:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 02:17:07,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:07,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106761852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:07,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:07,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2024-11-16 02:17:07,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580462148] [2024-11-16 02:17:07,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:07,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 02:17:07,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 02:17:07,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:17:07,655 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2024-11-16 02:17:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:08,019 INFO L93 Difference]: Finished difference Result 291 states and 394 transitions. [2024-11-16 02:17:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 02:17:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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 38 [2024-11-16 02:17:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:08,021 INFO L225 Difference]: With dead ends: 291 [2024-11-16 02:17:08,021 INFO L226 Difference]: Without dead ends: 262 [2024-11-16 02:17:08,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-11-16 02:17:08,023 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 179 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:08,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 900 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:17:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-16 02:17:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 137. [2024-11-16 02:17:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 123 states have (on average 1.2926829268292683) internal successors, (159), 128 states have internal predecessors, (159), 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) [2024-11-16 02:17:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 176 transitions. [2024-11-16 02:17:08,037 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 176 transitions. Word has length 38 [2024-11-16 02:17:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:08,037 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 176 transitions. [2024-11-16 02:17:08,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2024-11-16 02:17:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 176 transitions. [2024-11-16 02:17:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-16 02:17:08,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:08,038 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-16 02:17:08,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:08,238 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 [2024-11-16 02:17:08,239 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:08,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:08,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1237370671, now seen corresponding path program 1 times [2024-11-16 02:17:08,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:08,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294763206] [2024-11-16 02:17:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:08,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:08,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:08,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:08,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294763206] [2024-11-16 02:17:08,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294763206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603608006] [2024-11-16 02:17:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:08,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:08,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:08,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:17:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:08,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 02:17:08,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:08,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:08,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603608006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:08,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:08,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2024-11-16 02:17:08,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542902599] [2024-11-16 02:17:08,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:08,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 02:17:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 02:17:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2024-11-16 02:17:08,981 INFO L87 Difference]: Start difference. First operand 137 states and 176 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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) [2024-11-16 02:17:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:09,400 INFO L93 Difference]: Finished difference Result 270 states and 361 transitions. [2024-11-16 02:17:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 02:17:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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 38 [2024-11-16 02:17:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:09,403 INFO L225 Difference]: With dead ends: 270 [2024-11-16 02:17:09,403 INFO L226 Difference]: Without dead ends: 258 [2024-11-16 02:17:09,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2024-11-16 02:17:09,404 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 225 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:09,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 758 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:17:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-16 02:17:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 141. [2024-11-16 02:17:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.2834645669291338) internal successors, (163), 132 states have internal predecessors, (163), 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) [2024-11-16 02:17:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 180 transitions. [2024-11-16 02:17:09,419 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 180 transitions. Word has length 38 [2024-11-16 02:17:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:09,419 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 180 transitions. [2024-11-16 02:17:09,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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) [2024-11-16 02:17:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 180 transitions. [2024-11-16 02:17:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-16 02:17:09,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:09,420 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:09,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:17:09,621 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 [2024-11-16 02:17:09,621 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:09,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:09,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2068501391, now seen corresponding path program 1 times [2024-11-16 02:17:09,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:09,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579821402] [2024-11-16 02:17:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:09,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:09,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:09,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:17:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579821402] [2024-11-16 02:17:09,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579821402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54584766] [2024-11-16 02:17:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:09,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:09,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:09,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:17:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 02:17:10,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 02:17:10,133 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:17:10,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54584766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:10,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:17:10,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-16 02:17:10,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528675207] [2024-11-16 02:17:10,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:10,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:17:10,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:17:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:17:10,136 INFO L87 Difference]: Start difference. First operand 141 states and 180 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-11-16 02:17:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:10,197 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2024-11-16 02:17:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:17:10,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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 42 [2024-11-16 02:17:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:10,199 INFO L225 Difference]: With dead ends: 173 [2024-11-16 02:17:10,199 INFO L226 Difference]: Without dead ends: 143 [2024-11-16 02:17:10,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:17:10,200 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:10,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-16 02:17:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2024-11-16 02:17:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.2677165354330708) internal successors, (161), 132 states have internal predecessors, (161), 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) [2024-11-16 02:17:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 178 transitions. [2024-11-16 02:17:10,213 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 178 transitions. Word has length 42 [2024-11-16 02:17:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:10,213 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 178 transitions. [2024-11-16 02:17:10,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-11-16 02:17:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 178 transitions. [2024-11-16 02:17:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-16 02:17:10,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:10,214 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-16 02:17:10,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 02:17:10,414 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 [2024-11-16 02:17:10,415 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:10,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:10,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1350972679, now seen corresponding path program 1 times [2024-11-16 02:17:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:10,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622638019] [2024-11-16 02:17:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:10,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-16 02:17:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:17:10,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622638019] [2024-11-16 02:17:10,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622638019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:10,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:10,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 02:17:10,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903623697] [2024-11-16 02:17:10,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:10,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:17:10,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:10,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:17:10,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:17:10,573 INFO L87 Difference]: Start difference. First operand 141 states and 178 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-16 02:17:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:10,615 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2024-11-16 02:17:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:17:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 48 [2024-11-16 02:17:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:10,616 INFO L225 Difference]: With dead ends: 169 [2024-11-16 02:17:10,617 INFO L226 Difference]: Without dead ends: 149 [2024-11-16 02:17:10,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:17:10,619 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:10,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-16 02:17:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2024-11-16 02:17:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 131 states have (on average 1.2671755725190839) internal successors, (166), 136 states have internal predecessors, (166), 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) [2024-11-16 02:17:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 183 transitions. [2024-11-16 02:17:10,633 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 183 transitions. Word has length 48 [2024-11-16 02:17:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:10,633 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 183 transitions. [2024-11-16 02:17:10,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-16 02:17:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 183 transitions. [2024-11-16 02:17:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-16 02:17:10,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:10,634 INFO L215 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] [2024-11-16 02:17:10,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-16 02:17:10,635 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:10,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:10,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1793196831, now seen corresponding path program 1 times [2024-11-16 02:17:10,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:10,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661371920] [2024-11-16 02:17:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:17:10,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661371920] [2024-11-16 02:17:10,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661371920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164823369] [2024-11-16 02:17:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:10,880 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:10,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:17:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-16 02:17:10,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:17:11,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:17:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164823369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:11,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:11,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 12] total 25 [2024-11-16 02:17:11,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867223548] [2024-11-16 02:17:11,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:11,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 02:17:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 02:17:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:17:11,522 INFO L87 Difference]: Start difference. First operand 145 states and 183 transitions. Second operand has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 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) [2024-11-16 02:17:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:12,582 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2024-11-16 02:17:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 02:17:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 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 49 [2024-11-16 02:17:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:12,584 INFO L225 Difference]: With dead ends: 372 [2024-11-16 02:17:12,584 INFO L226 Difference]: Without dead ends: 263 [2024-11-16 02:17:12,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-11-16 02:17:12,586 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 218 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:12,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1430 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 02:17:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-16 02:17:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 170. [2024-11-16 02:17:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 156 states have (on average 1.2371794871794872) internal successors, (193), 161 states have internal predecessors, (193), 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) [2024-11-16 02:17:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 210 transitions. [2024-11-16 02:17:12,606 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 210 transitions. Word has length 49 [2024-11-16 02:17:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:12,606 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 210 transitions. [2024-11-16 02:17:12,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 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) [2024-11-16 02:17:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 210 transitions. [2024-11-16 02:17:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-16 02:17:12,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:12,608 INFO L215 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, 1, 1, 1, 1] [2024-11-16 02:17:12,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 02:17:12,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:12,809 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:12,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1468840446, now seen corresponding path program 1 times [2024-11-16 02:17:12,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:12,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675685680] [2024-11-16 02:17:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:13,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:13,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:13,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:13,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675685680] [2024-11-16 02:17:13,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675685680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64236997] [2024-11-16 02:17:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:13,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:13,531 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:13,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:17:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:13,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 02:17:13,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:13,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 02:17:14,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64236997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:14,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:14,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 12] total 29 [2024-11-16 02:17:14,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443607278] [2024-11-16 02:17:14,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:14,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-16 02:17:14,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-16 02:17:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2024-11-16 02:17:14,334 INFO L87 Difference]: Start difference. First operand 170 states and 210 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 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) [2024-11-16 02:17:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:17,049 INFO L93 Difference]: Finished difference Result 431 states and 550 transitions. [2024-11-16 02:17:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 02:17:17,049 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 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 51 [2024-11-16 02:17:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:17,051 INFO L225 Difference]: With dead ends: 431 [2024-11-16 02:17:17,051 INFO L226 Difference]: Without dead ends: 359 [2024-11-16 02:17:17,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2024-11-16 02:17:17,053 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 197 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:17,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 2132 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 02:17:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-11-16 02:17:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 218. [2024-11-16 02:17:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 204 states have (on average 1.2647058823529411) internal successors, (258), 209 states have internal predecessors, (258), 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) [2024-11-16 02:17:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 275 transitions. [2024-11-16 02:17:17,088 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 275 transitions. Word has length 51 [2024-11-16 02:17:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:17,090 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 275 transitions. [2024-11-16 02:17:17,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 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) [2024-11-16 02:17:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 275 transitions. [2024-11-16 02:17:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-16 02:17:17,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:17,093 INFO L215 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, 1, 1, 1, 1] [2024-11-16 02:17:17,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:17:17,293 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,SelfDestructingSolverStorable15 [2024-11-16 02:17:17,294 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:17,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:17,294 INFO L85 PathProgramCache]: Analyzing trace with hash -451418851, now seen corresponding path program 1 times [2024-11-16 02:17:17,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:17,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060727028] [2024-11-16 02:17:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:17,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:17,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:17,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 02:17:17,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:17,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060727028] [2024-11-16 02:17:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060727028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:17,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45330549] [2024-11-16 02:17:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:17,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:17,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:17,437 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:17,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:17:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:17,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 02:17:17,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:17:17,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 02:17:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45330549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:17,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2024-11-16 02:17:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916173114] [2024-11-16 02:17:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:17,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 02:17:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 02:17:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:17:17,958 INFO L87 Difference]: Start difference. First operand 218 states and 275 transitions. Second operand has 20 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 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) [2024-11-16 02:17:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:18,562 INFO L93 Difference]: Finished difference Result 429 states and 564 transitions. [2024-11-16 02:17:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-16 02:17:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 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 51 [2024-11-16 02:17:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:18,565 INFO L225 Difference]: With dead ends: 429 [2024-11-16 02:17:18,565 INFO L226 Difference]: Without dead ends: 397 [2024-11-16 02:17:18,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-11-16 02:17:18,566 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 189 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:18,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1180 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:17:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-16 02:17:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 274. [2024-11-16 02:17:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 260 states have (on average 1.2846153846153847) internal successors, (334), 265 states have internal predecessors, (334), 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) [2024-11-16 02:17:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 351 transitions. [2024-11-16 02:17:18,604 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 351 transitions. Word has length 51 [2024-11-16 02:17:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:18,604 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 351 transitions. [2024-11-16 02:17:18,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 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) [2024-11-16 02:17:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 351 transitions. [2024-11-16 02:17:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-16 02:17:18,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:18,606 INFO L215 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, 1, 1, 1, 1] [2024-11-16 02:17:18,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 02:17:18,810 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,SelfDestructingSolverStorable16 [2024-11-16 02:17:18,811 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:18,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash -422789700, now seen corresponding path program 2 times [2024-11-16 02:17:18,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:18,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550239386] [2024-11-16 02:17:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:18,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:18,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:18,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:17:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550239386] [2024-11-16 02:17:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550239386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757691806] [2024-11-16 02:17:18,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:17:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:18,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:19,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:17:19,110 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-16 02:17:19,110 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:19,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 02:17:19,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 02:17:19,304 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:17:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757691806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:19,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:17:19,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2024-11-16 02:17:19,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44395439] [2024-11-16 02:17:19,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:19,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:17:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:17:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:17:19,306 INFO L87 Difference]: Start difference. First operand 274 states and 351 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-11-16 02:17:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:19,397 INFO L93 Difference]: Finished difference Result 340 states and 435 transitions. [2024-11-16 02:17:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:17:19,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 51 [2024-11-16 02:17:19,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:19,400 INFO L225 Difference]: With dead ends: 340 [2024-11-16 02:17:19,400 INFO L226 Difference]: Without dead ends: 305 [2024-11-16 02:17:19,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:17:19,401 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:19,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 159 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-16 02:17:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 265. [2024-11-16 02:17:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 251 states have (on average 1.2709163346613546) internal successors, (319), 256 states have internal predecessors, (319), 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) [2024-11-16 02:17:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 336 transitions. [2024-11-16 02:17:19,432 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 336 transitions. Word has length 51 [2024-11-16 02:17:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:19,432 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 336 transitions. [2024-11-16 02:17:19,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-11-16 02:17:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 336 transitions. [2024-11-16 02:17:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-16 02:17:19,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:19,434 INFO L215 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, 1, 1, 1, 1] [2024-11-16 02:17:19,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 02:17:19,634 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,SelfDestructingSolverStorable17 [2024-11-16 02:17:19,635 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:19,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2046597086, now seen corresponding path program 1 times [2024-11-16 02:17:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068319084] [2024-11-16 02:17:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:20,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:20,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:20,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068319084] [2024-11-16 02:17:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068319084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745375130] [2024-11-16 02:17:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:20,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:20,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:20,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:20,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 02:17:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:20,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-16 02:17:20,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:20,415 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 [2024-11-16 02:17:20,730 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 [2024-11-16 02:17:20,734 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 [2024-11-16 02:17:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:17:20,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:21,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:21,046 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 [2024-11-16 02:17:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:21,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745375130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:21,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:21,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2024-11-16 02:17:21,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107912015] [2024-11-16 02:17:21,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:21,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-16 02:17:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-16 02:17:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2024-11-16 02:17:21,136 INFO L87 Difference]: Start difference. First operand 265 states and 336 transitions. Second operand has 31 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 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) [2024-11-16 02:17:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:21,896 INFO L93 Difference]: Finished difference Result 512 states and 661 transitions. [2024-11-16 02:17:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 02:17:21,897 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 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 51 [2024-11-16 02:17:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:21,899 INFO L225 Difference]: With dead ends: 512 [2024-11-16 02:17:21,899 INFO L226 Difference]: Without dead ends: 427 [2024-11-16 02:17:21,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2024-11-16 02:17:21,902 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 133 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:21,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1240 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:17:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-16 02:17:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 304. [2024-11-16 02:17:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 290 states have (on average 1.2758620689655173) internal successors, (370), 295 states have internal predecessors, (370), 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) [2024-11-16 02:17:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 387 transitions. [2024-11-16 02:17:21,947 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 387 transitions. Word has length 51 [2024-11-16 02:17:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:21,947 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 387 transitions. [2024-11-16 02:17:21,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 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) [2024-11-16 02:17:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 387 transitions. [2024-11-16 02:17:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 02:17:21,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:21,950 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-16 02:17:21,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:22,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:22,155 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:22,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash -563759263, now seen corresponding path program 2 times [2024-11-16 02:17:22,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:22,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961237879] [2024-11-16 02:17:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:22,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:22,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:22,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:17:22,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961237879] [2024-11-16 02:17:22,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961237879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595560806] [2024-11-16 02:17:22,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:17:22,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:22,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:22,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:22,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 02:17:22,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:17:22,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:22,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 02:17:22,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:22,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 02:17:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595560806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:23,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:23,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2024-11-16 02:17:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190379392] [2024-11-16 02:17:23,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:23,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 02:17:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 02:17:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:17:23,079 INFO L87 Difference]: Start difference. First operand 304 states and 387 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 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) [2024-11-16 02:17:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:23,811 INFO L93 Difference]: Finished difference Result 530 states and 678 transitions. [2024-11-16 02:17:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 02:17:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 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 [2024-11-16 02:17:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:23,814 INFO L225 Difference]: With dead ends: 530 [2024-11-16 02:17:23,814 INFO L226 Difference]: Without dead ends: 452 [2024-11-16 02:17:23,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-11-16 02:17:23,815 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 144 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:23,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 993 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:17:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-11-16 02:17:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 302. [2024-11-16 02:17:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 288 states have (on average 1.2465277777777777) internal successors, (359), 293 states have internal predecessors, (359), 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) [2024-11-16 02:17:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 376 transitions. [2024-11-16 02:17:23,863 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 376 transitions. Word has length 53 [2024-11-16 02:17:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:23,864 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 376 transitions. [2024-11-16 02:17:23,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 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) [2024-11-16 02:17:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 376 transitions. [2024-11-16 02:17:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-16 02:17:23,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:23,865 INFO L215 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, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:23,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-16 02:17:24,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:24,066 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:24,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1980398499, now seen corresponding path program 1 times [2024-11-16 02:17:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093634394] [2024-11-16 02:17:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:24,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:24,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:24,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-16 02:17:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:24,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-16 02:17:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:17:24,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093634394] [2024-11-16 02:17:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093634394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458014716] [2024-11-16 02:17:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:24,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:24,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:24,243 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:24,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 02:17:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:24,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 02:17:24,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 02:17:24,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:24,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458014716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:24,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:24,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2024-11-16 02:17:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137709375] [2024-11-16 02:17:24,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:24,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 02:17:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 02:17:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-16 02:17:24,591 INFO L87 Difference]: Start difference. First operand 302 states and 376 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2024-11-16 02:17:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:24,968 INFO L93 Difference]: Finished difference Result 409 states and 507 transitions. [2024-11-16 02:17:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:17:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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 59 [2024-11-16 02:17:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:24,970 INFO L225 Difference]: With dead ends: 409 [2024-11-16 02:17:24,970 INFO L226 Difference]: Without dead ends: 330 [2024-11-16 02:17:24,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:17:24,971 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 37 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:24,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 594 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:17:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-16 02:17:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 280. [2024-11-16 02:17:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 269 states have (on average 1.245353159851301) internal successors, (335), 273 states have internal predecessors, (335), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:17:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 348 transitions. [2024-11-16 02:17:25,018 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 348 transitions. Word has length 59 [2024-11-16 02:17:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:25,018 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 348 transitions. [2024-11-16 02:17:25,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2024-11-16 02:17:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 348 transitions. [2024-11-16 02:17:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-16 02:17:25,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:25,019 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:25,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-16 02:17:25,219 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,SelfDestructingSolverStorable20 [2024-11-16 02:17:25,220 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:25,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash -184064412, now seen corresponding path program 1 times [2024-11-16 02:17:25,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:25,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123628401] [2024-11-16 02:17:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:26,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:26,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 02:17:26,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:26,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123628401] [2024-11-16 02:17:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123628401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:26,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77738074] [2024-11-16 02:17:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:26,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:26,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:26,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:26,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 02:17:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:26,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-16 02:17:26,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:26,590 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 [2024-11-16 02:17:27,384 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 [2024-11-16 02:17:27,388 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 [2024-11-16 02:17:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 02:17:27,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:27,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:27,878 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 37 treesize of output 41 [2024-11-16 02:17:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 02:17:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77738074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:28,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 43 [2024-11-16 02:17:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716277853] [2024-11-16 02:17:28,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:28,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-16 02:17:28,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-16 02:17:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2024-11-16 02:17:28,138 INFO L87 Difference]: Start difference. First operand 280 states and 348 transitions. Second operand has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 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) [2024-11-16 02:17:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:29,428 INFO L93 Difference]: Finished difference Result 477 states and 595 transitions. [2024-11-16 02:17:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-16 02:17:29,429 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 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 [2024-11-16 02:17:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:29,430 INFO L225 Difference]: With dead ends: 477 [2024-11-16 02:17:29,430 INFO L226 Difference]: Without dead ends: 342 [2024-11-16 02:17:29,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=379, Invalid=2927, Unknown=0, NotChecked=0, Total=3306 [2024-11-16 02:17:29,432 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 178 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:29,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1147 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-16 02:17:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-16 02:17:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 304. [2024-11-16 02:17:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 293 states have (on average 1.2320819112627985) internal successors, (361), 297 states have internal predecessors, (361), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:17:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 374 transitions. [2024-11-16 02:17:29,473 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 374 transitions. Word has length 57 [2024-11-16 02:17:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:29,473 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 374 transitions. [2024-11-16 02:17:29,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 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) [2024-11-16 02:17:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 374 transitions. [2024-11-16 02:17:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-16 02:17:29,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:29,475 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:29,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-16 02:17:29,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:29,682 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:29,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash -839764959, now seen corresponding path program 1 times [2024-11-16 02:17:29,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:29,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6677098] [2024-11-16 02:17:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:29,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:29,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:29,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 02:17:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:29,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-16 02:17:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-16 02:17:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:29,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6677098] [2024-11-16 02:17:29,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6677098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:29,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613706598] [2024-11-16 02:17:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:29,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:29,936 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:29,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 02:17:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:30,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 02:17:30,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 02:17:30,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 02:17:30,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613706598] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:30,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:30,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-16 02:17:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109426765] [2024-11-16 02:17:30,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:30,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 02:17:30,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 02:17:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-16 02:17:30,265 INFO L87 Difference]: Start difference. First operand 304 states and 374 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-11-16 02:17:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:30,462 INFO L93 Difference]: Finished difference Result 356 states and 440 transitions. [2024-11-16 02:17:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 02:17:30,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 61 [2024-11-16 02:17:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:30,465 INFO L225 Difference]: With dead ends: 356 [2024-11-16 02:17:30,465 INFO L226 Difference]: Without dead ends: 294 [2024-11-16 02:17:30,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:17:30,466 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 20 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:30,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-16 02:17:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2024-11-16 02:17:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 275 states have (on average 1.2327272727272727) internal successors, (339), 279 states have internal predecessors, (339), 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) [2024-11-16 02:17:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 354 transitions. [2024-11-16 02:17:30,514 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 354 transitions. Word has length 61 [2024-11-16 02:17:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:30,514 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 354 transitions. [2024-11-16 02:17:30,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-11-16 02:17:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 354 transitions. [2024-11-16 02:17:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-16 02:17:30,516 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:30,516 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1] [2024-11-16 02:17:30,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-16 02:17:30,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:30,719 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:30,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash -658566722, now seen corresponding path program 1 times [2024-11-16 02:17:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:30,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914944037] [2024-11-16 02:17:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:30,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:31,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:31,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:31,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914944037] [2024-11-16 02:17:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914944037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404084892] [2024-11-16 02:17:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:31,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:31,202 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:31,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 02:17:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:31,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 02:17:31,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:31,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:31,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404084892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:31,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:31,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2024-11-16 02:17:31,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441507633] [2024-11-16 02:17:31,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:31,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 02:17:31,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 02:17:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2024-11-16 02:17:31,726 INFO L87 Difference]: Start difference. First operand 287 states and 354 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 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) [2024-11-16 02:17:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:32,584 INFO L93 Difference]: Finished difference Result 730 states and 915 transitions. [2024-11-16 02:17:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 02:17:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 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 61 [2024-11-16 02:17:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:32,587 INFO L225 Difference]: With dead ends: 730 [2024-11-16 02:17:32,587 INFO L226 Difference]: Without dead ends: 529 [2024-11-16 02:17:32,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2024-11-16 02:17:32,588 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 220 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:32,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1285 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:17:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-11-16 02:17:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 274. [2024-11-16 02:17:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 262 states have (on average 1.213740458015267) internal successors, (318), 266 states have internal predecessors, (318), 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) [2024-11-16 02:17:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 333 transitions. [2024-11-16 02:17:32,636 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 333 transitions. Word has length 61 [2024-11-16 02:17:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:32,637 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 333 transitions. [2024-11-16 02:17:32,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 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) [2024-11-16 02:17:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 333 transitions. [2024-11-16 02:17:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-16 02:17:32,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:32,638 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1] [2024-11-16 02:17:32,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:32,838 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,SelfDestructingSolverStorable23 [2024-11-16 02:17:32,839 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:32,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash 407630279, now seen corresponding path program 1 times [2024-11-16 02:17:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:32,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936914965] [2024-11-16 02:17:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:33,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:33,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:33,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936914965] [2024-11-16 02:17:33,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936914965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639378899] [2024-11-16 02:17:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:33,843 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:33,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 02:17:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:33,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-16 02:17:33,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:34,045 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 [2024-11-16 02:17:34,385 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 [2024-11-16 02:17:34,389 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 [2024-11-16 02:17:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 02:17:34,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:34,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:34,864 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 [2024-11-16 02:17:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 02:17:35,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639378899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:35,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:35,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-11-16 02:17:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489197309] [2024-11-16 02:17:35,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:35,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-16 02:17:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-16 02:17:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 02:17:35,016 INFO L87 Difference]: Start difference. First operand 274 states and 333 transitions. Second operand has 38 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 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) [2024-11-16 02:17:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:35,832 INFO L93 Difference]: Finished difference Result 449 states and 560 transitions. [2024-11-16 02:17:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:17:35,836 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 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 63 [2024-11-16 02:17:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:35,838 INFO L225 Difference]: With dead ends: 449 [2024-11-16 02:17:35,838 INFO L226 Difference]: Without dead ends: 387 [2024-11-16 02:17:35,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2024-11-16 02:17:35,842 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 216 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:35,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1719 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 02:17:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-16 02:17:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 300. [2024-11-16 02:17:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 288 states have (on average 1.21875) internal successors, (351), 292 states have internal predecessors, (351), 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) [2024-11-16 02:17:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 366 transitions. [2024-11-16 02:17:35,900 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 366 transitions. Word has length 63 [2024-11-16 02:17:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:35,900 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 366 transitions. [2024-11-16 02:17:35,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 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) [2024-11-16 02:17:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 366 transitions. [2024-11-16 02:17:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-16 02:17:35,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:35,901 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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] [2024-11-16 02:17:35,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-16 02:17:36,102 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 [2024-11-16 02:17:36,102 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:36,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash 592009511, now seen corresponding path program 3 times [2024-11-16 02:17:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618438515] [2024-11-16 02:17:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:36,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:36,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:36,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:17:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618438515] [2024-11-16 02:17:36,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618438515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836576949] [2024-11-16 02:17:36,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:17:36,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:36,331 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:36,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 02:17:36,601 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-16 02:17:36,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:36,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 02:17:36,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:36,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:37,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836576949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:37,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:37,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-16 02:17:37,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888744612] [2024-11-16 02:17:37,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:37,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 02:17:37,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:37,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 02:17:37,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-16 02:17:37,013 INFO L87 Difference]: Start difference. First operand 300 states and 366 transitions. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 21 states have internal predecessors, (107), 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) [2024-11-16 02:17:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:37,413 INFO L93 Difference]: Finished difference Result 404 states and 487 transitions. [2024-11-16 02:17:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:17:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 21 states have internal predecessors, (107), 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 65 [2024-11-16 02:17:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:37,416 INFO L225 Difference]: With dead ends: 404 [2024-11-16 02:17:37,416 INFO L226 Difference]: Without dead ends: 312 [2024-11-16 02:17:37,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-16 02:17:37,417 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 38 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:37,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1148 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:17:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-16 02:17:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 277. [2024-11-16 02:17:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 265 states have (on average 1.211320754716981) internal successors, (321), 269 states have internal predecessors, (321), 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) [2024-11-16 02:17:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 336 transitions. [2024-11-16 02:17:37,456 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 336 transitions. Word has length 65 [2024-11-16 02:17:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:37,456 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 336 transitions. [2024-11-16 02:17:37,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 21 states have internal predecessors, (107), 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) [2024-11-16 02:17:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 336 transitions. [2024-11-16 02:17:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-16 02:17:37,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:37,457 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2024-11-16 02:17:37,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-16 02:17:37,658 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 [2024-11-16 02:17:37,658 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:37,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1916826814, now seen corresponding path program 2 times [2024-11-16 02:17:37,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:37,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459293968] [2024-11-16 02:17:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:37,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:38,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:38,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 02:17:38,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:38,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459293968] [2024-11-16 02:17:38,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459293968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:38,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924039887] [2024-11-16 02:17:38,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:17:38,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:38,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:38,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:38,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 02:17:38,204 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:17:38,205 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:38,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-16 02:17:38,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:38,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 02:17:38,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924039887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:38,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:38,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 25 [2024-11-16 02:17:38,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793440724] [2024-11-16 02:17:38,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:38,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 02:17:38,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 02:17:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:17:38,950 INFO L87 Difference]: Start difference. First operand 277 states and 336 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 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) [2024-11-16 02:17:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:39,772 INFO L93 Difference]: Finished difference Result 537 states and 661 transitions. [2024-11-16 02:17:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-16 02:17:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 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 65 [2024-11-16 02:17:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:39,775 INFO L225 Difference]: With dead ends: 537 [2024-11-16 02:17:39,775 INFO L226 Difference]: Without dead ends: 452 [2024-11-16 02:17:39,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 02:17:39,776 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:39,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1742 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 02:17:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-11-16 02:17:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 298. [2024-11-16 02:17:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 286 states have (on average 1.2062937062937062) internal successors, (345), 290 states have internal predecessors, (345), 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) [2024-11-16 02:17:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 360 transitions. [2024-11-16 02:17:39,820 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 360 transitions. Word has length 65 [2024-11-16 02:17:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:39,820 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 360 transitions. [2024-11-16 02:17:39,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 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) [2024-11-16 02:17:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 360 transitions. [2024-11-16 02:17:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-16 02:17:39,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:39,821 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:39,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-16 02:17:40,022 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 [2024-11-16 02:17:40,022 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:40,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1491583538, now seen corresponding path program 1 times [2024-11-16 02:17:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:40,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009082987] [2024-11-16 02:17:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:40,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:40,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:40,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-16 02:17:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:40,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-16 02:17:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:40,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:40,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009082987] [2024-11-16 02:17:40,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009082987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:40,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977651009] [2024-11-16 02:17:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:40,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:40,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:40,646 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:40,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-16 02:17:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:40,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-16 02:17:40,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:44,907 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 [2024-11-16 02:17:44,983 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 [2024-11-16 02:17:44,985 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 [2024-11-16 02:17:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-16 02:17:45,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:45,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:45,143 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 [2024-11-16 02:17:45,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:45,155 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 [2024-11-16 02:17:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-16 02:17:45,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977651009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:45,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:45,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 24 [2024-11-16 02:17:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552939835] [2024-11-16 02:17:45,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:45,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 02:17:45,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 02:17:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=413, Unknown=1, NotChecked=42, Total=552 [2024-11-16 02:17:45,250 INFO L87 Difference]: Start difference. First operand 298 states and 360 transitions. Second operand has 24 states, 21 states have (on average 4.571428571428571) internal successors, (96), 24 states have internal predecessors, (96), 7 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) [2024-11-16 02:17:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:45,669 INFO L93 Difference]: Finished difference Result 415 states and 506 transitions. [2024-11-16 02:17:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 02:17:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 4.571428571428571) internal successors, (96), 24 states have internal predecessors, (96), 7 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 70 [2024-11-16 02:17:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:45,671 INFO L225 Difference]: With dead ends: 415 [2024-11-16 02:17:45,671 INFO L226 Difference]: Without dead ends: 393 [2024-11-16 02:17:45,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=117, Invalid=486, Unknown=1, NotChecked=46, Total=650 [2024-11-16 02:17:45,673 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 92 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:45,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 865 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 464 Invalid, 0 Unknown, 219 Unchecked, 0.3s Time] [2024-11-16 02:17:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-11-16 02:17:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 316. [2024-11-16 02:17:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 302 states have (on average 1.195364238410596) internal successors, (361), 306 states have internal predecessors, (361), 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) [2024-11-16 02:17:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions. [2024-11-16 02:17:45,725 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 70 [2024-11-16 02:17:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:45,726 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions. [2024-11-16 02:17:45,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 4.571428571428571) internal successors, (96), 24 states have internal predecessors, (96), 7 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) [2024-11-16 02:17:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions. [2024-11-16 02:17:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-16 02:17:45,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:45,727 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2024-11-16 02:17:45,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-16 02:17:45,927 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 [2024-11-16 02:17:45,928 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:45,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2118493443, now seen corresponding path program 1 times [2024-11-16 02:17:45,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:45,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287195916] [2024-11-16 02:17:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:45,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:46,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:46,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:46,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-16 02:17:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:46,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-16 02:17:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:17:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287195916] [2024-11-16 02:17:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287195916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:46,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344935066] [2024-11-16 02:17:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:46,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:46,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:46,768 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:46,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-16 02:17:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:46,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-16 02:17:46,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:46,909 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 [2024-11-16 02:17:47,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:17:47,406 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 [2024-11-16 02:17:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 02:17:47,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:47,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:47,593 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 [2024-11-16 02:17:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 02:17:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344935066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:47,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 32 [2024-11-16 02:17:47,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487189653] [2024-11-16 02:17:47,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:47,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 02:17:47,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 02:17:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-11-16 02:17:47,791 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 30 states have internal predecessors, (121), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 02:17:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:48,674 INFO L93 Difference]: Finished difference Result 539 states and 660 transitions. [2024-11-16 02:17:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 02:17:48,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 30 states have internal predecessors, (121), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 71 [2024-11-16 02:17:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:48,677 INFO L225 Difference]: With dead ends: 539 [2024-11-16 02:17:48,677 INFO L226 Difference]: Without dead ends: 427 [2024-11-16 02:17:48,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2024-11-16 02:17:48,678 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 115 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:48,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1463 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 02:17:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-16 02:17:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 412. [2024-11-16 02:17:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 388 states have (on average 1.208762886597938) internal successors, (469), 397 states have internal predecessors, (469), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 02:17:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 499 transitions. [2024-11-16 02:17:48,757 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 499 transitions. Word has length 71 [2024-11-16 02:17:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:48,757 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 499 transitions. [2024-11-16 02:17:48,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 30 states have internal predecessors, (121), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 02:17:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 499 transitions. [2024-11-16 02:17:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-16 02:17:48,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:48,759 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 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] [2024-11-16 02:17:48,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:48,959 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 [2024-11-16 02:17:48,959 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:48,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -600475292, now seen corresponding path program 2 times [2024-11-16 02:17:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:48,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705890957] [2024-11-16 02:17:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:48,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:49,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:49,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:17:49,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:49,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705890957] [2024-11-16 02:17:49,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705890957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:49,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029766612] [2024-11-16 02:17:49,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:17:49,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:49,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:49,165 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:49,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-16 02:17:49,299 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:17:49,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:49,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 02:17:49,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:49,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:49,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029766612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:49,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:49,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-16 02:17:49,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673165615] [2024-11-16 02:17:49,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:49,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 02:17:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 02:17:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2024-11-16 02:17:49,812 INFO L87 Difference]: Start difference. First operand 412 states and 499 transitions. Second operand has 28 states, 27 states have (on average 4.703703703703703) internal successors, (127), 27 states have internal predecessors, (127), 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) [2024-11-16 02:17:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:50,829 INFO L93 Difference]: Finished difference Result 922 states and 1133 transitions. [2024-11-16 02:17:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 02:17:50,830 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.703703703703703) internal successors, (127), 27 states have internal predecessors, (127), 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 69 [2024-11-16 02:17:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:50,833 INFO L225 Difference]: With dead ends: 922 [2024-11-16 02:17:50,833 INFO L226 Difference]: Without dead ends: 683 [2024-11-16 02:17:50,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2024-11-16 02:17:50,836 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 64 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:50,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1976 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 02:17:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2024-11-16 02:17:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 565. [2024-11-16 02:17:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 541 states have (on average 1.201478743068392) internal successors, (650), 550 states have internal predecessors, (650), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 02:17:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 680 transitions. [2024-11-16 02:17:50,965 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 680 transitions. Word has length 69 [2024-11-16 02:17:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:50,965 INFO L471 AbstractCegarLoop]: Abstraction has 565 states and 680 transitions. [2024-11-16 02:17:50,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.703703703703703) internal successors, (127), 27 states have internal predecessors, (127), 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) [2024-11-16 02:17:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 680 transitions. [2024-11-16 02:17:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-16 02:17:50,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:50,967 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2024-11-16 02:17:50,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-16 02:17:51,171 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 [2024-11-16 02:17:51,172 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:51,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2019175745, now seen corresponding path program 3 times [2024-11-16 02:17:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:51,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016025344] [2024-11-16 02:17:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:52,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:52,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 02:17:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:52,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016025344] [2024-11-16 02:17:52,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016025344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:52,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154667739] [2024-11-16 02:17:52,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:17:52,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:52,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:52,409 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:52,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-16 02:17:52,767 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:17:52,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:52,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-16 02:17:52,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:52,806 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 [2024-11-16 02:17:52,880 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 [2024-11-16 02:17:52,916 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 [2024-11-16 02:17:53,309 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 [2024-11-16 02:17:53,312 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 [2024-11-16 02:17:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:17:53,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 02:17:54,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154667739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:54,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 18] total 41 [2024-11-16 02:17:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383368288] [2024-11-16 02:17:54,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:54,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-16 02:17:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:54,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-16 02:17:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2024-11-16 02:17:54,084 INFO L87 Difference]: Start difference. First operand 565 states and 680 transitions. Second operand has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 40 states have internal predecessors, (115), 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) [2024-11-16 02:17:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:55,238 INFO L93 Difference]: Finished difference Result 679 states and 817 transitions. [2024-11-16 02:17:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 02:17:55,239 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 40 states have internal predecessors, (115), 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 69 [2024-11-16 02:17:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:55,241 INFO L225 Difference]: With dead ends: 679 [2024-11-16 02:17:55,241 INFO L226 Difference]: Without dead ends: 619 [2024-11-16 02:17:55,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 02:17:55,243 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 153 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:55,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1613 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-16 02:17:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2024-11-16 02:17:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 582. [2024-11-16 02:17:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 558 states have (on average 1.1989247311827957) internal successors, (669), 567 states have internal predecessors, (669), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 02:17:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 699 transitions. [2024-11-16 02:17:55,368 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 699 transitions. Word has length 69 [2024-11-16 02:17:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:55,369 INFO L471 AbstractCegarLoop]: Abstraction has 582 states and 699 transitions. [2024-11-16 02:17:55,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 40 states have internal predecessors, (115), 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) [2024-11-16 02:17:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 699 transitions. [2024-11-16 02:17:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-16 02:17:55,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:55,370 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2024-11-16 02:17:55,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:55,571 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 [2024-11-16 02:17:55,572 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:55,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:55,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1726895795, now seen corresponding path program 4 times [2024-11-16 02:17:55,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:55,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776804708] [2024-11-16 02:17:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:55,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:56,728 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:17:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:56,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:17:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 02:17:56,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:56,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776804708] [2024-11-16 02:17:56,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776804708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:56,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418283015] [2024-11-16 02:17:56,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:17:56,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:56,740 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:56,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-16 02:17:56,891 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:17:56,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:56,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-16 02:17:56,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:57,277 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 [2024-11-16 02:17:57,279 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 [2024-11-16 02:17:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:17:57,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:57,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:57,903 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 [2024-11-16 02:17:57,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:17:57,919 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 38 treesize of output 41 [2024-11-16 02:17:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 02:17:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418283015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:58,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:58,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 39 [2024-11-16 02:17:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480264417] [2024-11-16 02:17:58,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:58,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-16 02:17:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-16 02:17:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2024-11-16 02:17:58,253 INFO L87 Difference]: Start difference. First operand 582 states and 699 transitions. Second operand has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 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) [2024-11-16 02:17:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:59,156 INFO L93 Difference]: Finished difference Result 839 states and 1011 transitions. [2024-11-16 02:17:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 02:17:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 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 69 [2024-11-16 02:17:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:59,159 INFO L225 Difference]: With dead ends: 839 [2024-11-16 02:17:59,159 INFO L226 Difference]: Without dead ends: 671 [2024-11-16 02:17:59,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2024-11-16 02:17:59,160 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 191 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:59,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1269 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 02:17:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2024-11-16 02:17:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 602. [2024-11-16 02:17:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 578 states have (on average 1.198961937716263) internal successors, (693), 587 states have internal predecessors, (693), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 02:17:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 723 transitions. [2024-11-16 02:17:59,273 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 723 transitions. Word has length 69 [2024-11-16 02:17:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:59,273 INFO L471 AbstractCegarLoop]: Abstraction has 602 states and 723 transitions. [2024-11-16 02:17:59,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 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) [2024-11-16 02:17:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 723 transitions. [2024-11-16 02:17:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-16 02:17:59,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:59,275 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2024-11-16 02:17:59,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-16 02:17:59,479 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 [2024-11-16 02:17:59,480 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:59,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash 216047821, now seen corresponding path program 5 times [2024-11-16 02:17:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:59,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637849590] [2024-11-16 02:17:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:59,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:18:00,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:18:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:18:00,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:18:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:18:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 02:18:00,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:18:00,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637849590] [2024-11-16 02:18:00,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637849590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:18:00,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960970076] [2024-11-16 02:18:00,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:18:00,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:18:00,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:18:00,529 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:18:00,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-16 02:18:00,736 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-16 02:18:00,737 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:18:00,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-16 02:18:00,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:18:01,240 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 20 treesize of output 12 [2024-11-16 02:18:01,242 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 [2024-11-16 02:18:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:18:01,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:18:01,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:18:01,818 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 [2024-11-16 02:18:01,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:18:01,829 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 38 treesize of output 41 [2024-11-16 02:18:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 02:18:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960970076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:18:02,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:18:02,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 17] total 45 [2024-11-16 02:18:02,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999637917] [2024-11-16 02:18:02,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:18:02,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-16 02:18:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:18:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-16 02:18:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1812, Unknown=0, NotChecked=0, Total=1980 [2024-11-16 02:18:02,122 INFO L87 Difference]: Start difference. First operand 602 states and 723 transitions. Second operand has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 43 states have internal predecessors, (122), 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) [2024-11-16 02:18:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:18:04,057 INFO L93 Difference]: Finished difference Result 722 states and 868 transitions. [2024-11-16 02:18:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-16 02:18:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 43 states have internal predecessors, (122), 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 69 [2024-11-16 02:18:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:18:04,059 INFO L225 Difference]: With dead ends: 722 [2024-11-16 02:18:04,059 INFO L226 Difference]: Without dead ends: 662 [2024-11-16 02:18:04,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=483, Invalid=4487, Unknown=0, NotChecked=0, Total=4970 [2024-11-16 02:18:04,062 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 199 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 02:18:04,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1684 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 02:18:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2024-11-16 02:18:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 596. [2024-11-16 02:18:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 572 states have (on average 1.1993006993006994) internal successors, (686), 581 states have internal predecessors, (686), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 02:18:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 716 transitions. [2024-11-16 02:18:04,170 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 716 transitions. Word has length 69 [2024-11-16 02:18:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:18:04,170 INFO L471 AbstractCegarLoop]: Abstraction has 596 states and 716 transitions. [2024-11-16 02:18:04,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 43 states have internal predecessors, (122), 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) [2024-11-16 02:18:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 716 transitions. [2024-11-16 02:18:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-16 02:18:04,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:18:04,172 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-16 02:18:04,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-16 02:18:04,376 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 [2024-11-16 02:18:04,377 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:18:04,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:18:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash 647782043, now seen corresponding path program 6 times [2024-11-16 02:18:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:18:04,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128761609] [2024-11-16 02:18:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:18:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:18:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:18:04,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 02:18:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:18:04,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:18:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:18:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-16 02:18:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:18:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128761609] [2024-11-16 02:18:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128761609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:18:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796423741] [2024-11-16 02:18:04,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:18:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:18:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:18:04,763 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:18:04,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-16 02:18:04,997 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-16 02:18:04,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:18:04,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 02:18:05,000 INFO L278 TraceCheckSpWp]: Computing forward predicates...