./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-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 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:03:43,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:03:43,972 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:03:43,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:03:43,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:03:43,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:03:44,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:03:44,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:03:44,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:03:44,004 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:03:44,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:03:44,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:03:44,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:03:44,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:03:44,006 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:03:44,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:03:44,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:03:44,007 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:03:44,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:03:44,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:03:44,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:03:44,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:03:44,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:03:44,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:03:44,009 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:03:44,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:03:44,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:03:44,010 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:03:44,010 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:03:44,010 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:03:44,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:03:44,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:03:44,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:03:44,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:03:44,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:03:44,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:03:44,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:03:44,012 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:03:44,013 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:03:44,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:03:44,013 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:03:44,013 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:03:44,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:03:44,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:03:44,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:03:44,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:03:44,236 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:03:44,237 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:03:44,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2023-11-22 18:03:45,240 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:03:45,399 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:03:45,399 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2023-11-22 18:03:45,404 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8be038bc2/cd14bdcde6064d2a9e9970908c26ef11/FLAGc92552263 [2023-11-22 18:03:45,413 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8be038bc2/cd14bdcde6064d2a9e9970908c26ef11 [2023-11-22 18:03:45,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:03:45,416 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:03:45,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:03:45,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:03:45,426 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:03:45,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ecc3ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45, skipping insertion in model container [2023-11-22 18:03:45,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,442 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:03:45,538 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2023-11-22 18:03:45,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:03:45,564 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:03:45,573 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2023-11-22 18:03:45,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:03:45,594 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:03:45,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45 WrapperNode [2023-11-22 18:03:45,595 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:03:45,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:03:45,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:03:45,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:03:45,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,623 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2023-11-22 18:03:45,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:03:45,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:03:45,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:03:45,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:03:45,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,634 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,642 INFO L189 HeapSplitter]: Split 12 memory accesses to 3 slices as follows [2, 3, 7] [2023-11-22 18:03:45,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,643 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,651 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,652 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,652 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:03:45,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:03:45,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:03:45,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:03:45,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (1/1) ... [2023-11-22 18:03:45,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:03:45,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:03:45,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:03:45,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:03:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:03:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:03:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:03:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:03:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:03:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:03:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:03:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:03:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:03:45,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:03:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:03:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:03:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:03:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 18:03:45,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 18:03:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:03:45,794 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:03:45,803 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:03:45,948 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:03:45,987 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:03:45,987 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-22 18:03:45,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:03:45 BoogieIcfgContainer [2023-11-22 18:03:45,987 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:03:45,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:03:45,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:03:45,997 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:03:45,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:03:45" (1/3) ... [2023-11-22 18:03:45,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6f0a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:03:45, skipping insertion in model container [2023-11-22 18:03:45,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:03:45" (2/3) ... [2023-11-22 18:03:45,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6f0a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:03:45, skipping insertion in model container [2023-11-22 18:03:45,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:03:45" (3/3) ... [2023-11-22 18:03:45,999 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2023-11-22 18:03:46,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:03:46,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:03:46,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:03:46,049 INFO L357 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, mHoare=true, 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;@189cef2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:03:46,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:03:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:03:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 18:03:46,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:46,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:46,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:46,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1234641983, now seen corresponding path program 1 times [2023-11-22 18:03:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:46,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132395052] [2023-11-22 18:03:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:46,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:03:46,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:46,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132395052] [2023-11-22 18:03:46,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132395052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:03:46,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:03:46,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:03:46,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816942942] [2023-11-22 18:03:46,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:03:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:03:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:03:46,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:03:46,273 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:46,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:46,376 INFO L93 Difference]: Finished difference Result 85 states and 145 transitions. [2023-11-22 18:03:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:03:46,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-22 18:03:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:46,384 INFO L225 Difference]: With dead ends: 85 [2023-11-22 18:03:46,384 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 18:03:46,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:03:46,391 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:46,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:03:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 18:03:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2023-11-22 18:03:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:03:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-11-22 18:03:46,447 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 9 [2023-11-22 18:03:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:46,447 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-11-22 18:03:46,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-11-22 18:03:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 18:03:46,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:46,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:46,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:03:46,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:46,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:46,452 INFO L85 PathProgramCache]: Analyzing trace with hash 312467306, now seen corresponding path program 1 times [2023-11-22 18:03:46,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:46,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995692847] [2023-11-22 18:03:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:03:46,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:46,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995692847] [2023-11-22 18:03:46,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995692847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:03:46,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190296055] [2023-11-22 18:03:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:46,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:03:46,551 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) [2023-11-22 18:03:46,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:03:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:46,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 18:03:46,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:03:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:03:46,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:03:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:03:46,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190296055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:03:46,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:03:46,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-22 18:03:46,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247187253] [2023-11-22 18:03:46,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:03:46,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 18:03:46,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:46,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 18:03:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:03:46,699 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:46,859 INFO L93 Difference]: Finished difference Result 146 states and 208 transitions. [2023-11-22 18:03:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 18:03:46,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-22 18:03:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:46,864 INFO L225 Difference]: With dead ends: 146 [2023-11-22 18:03:46,864 INFO L226 Difference]: Without dead ends: 118 [2023-11-22 18:03:46,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:03:46,866 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:46,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 108 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:03:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-22 18:03:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 34. [2023-11-22 18:03:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:03:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-11-22 18:03:46,885 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 10 [2023-11-22 18:03:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:46,885 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-11-22 18:03:46,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-11-22 18:03:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-22 18:03:46,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:46,887 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:46,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 18:03:47,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:47,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:47,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1551755521, now seen corresponding path program 2 times [2023-11-22 18:03:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:47,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241127603] [2023-11-22 18:03:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:47,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:03:47,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:47,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241127603] [2023-11-22 18:03:47,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241127603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:03:47,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:03:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:03:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011018309] [2023-11-22 18:03:47,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:03:47,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:03:47,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:47,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:03:47,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:03:47,234 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:47,254 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2023-11-22 18:03:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 18:03:47,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-22 18:03:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:47,255 INFO L225 Difference]: With dead ends: 66 [2023-11-22 18:03:47,255 INFO L226 Difference]: Without dead ends: 37 [2023-11-22 18:03:47,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:03:47,256 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:47,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:03:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-22 18:03:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-22 18:03:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:03:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-11-22 18:03:47,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 13 [2023-11-22 18:03:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:47,260 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-11-22 18:03:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-11-22 18:03:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 18:03:47,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:47,261 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:47,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 18:03:47,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:47,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1817742572, now seen corresponding path program 1 times [2023-11-22 18:03:47,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:47,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792150565] [2023-11-22 18:03:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:47,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 18:03:47,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:47,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792150565] [2023-11-22 18:03:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792150565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:03:47,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:03:47,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:03:47,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181368920] [2023-11-22 18:03:47,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:03:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:03:47,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:03:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:03:47,346 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:47,368 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2023-11-22 18:03:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:03:47,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-22 18:03:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:47,369 INFO L225 Difference]: With dead ends: 73 [2023-11-22 18:03:47,370 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 18:03:47,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:03:47,377 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:47,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:03:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 18:03:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2023-11-22 18:03:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:03:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-11-22 18:03:47,388 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 25 [2023-11-22 18:03:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:47,389 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-11-22 18:03:47,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-11-22 18:03:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 18:03:47,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:47,389 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:47,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 18:03:47,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:47,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:47,390 INFO L85 PathProgramCache]: Analyzing trace with hash 209311678, now seen corresponding path program 1 times [2023-11-22 18:03:47,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:47,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164323578] [2023-11-22 18:03:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:47,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 18:03:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164323578] [2023-11-22 18:03:47,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164323578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:03:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817220111] [2023-11-22 18:03:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:47,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:47,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:03:47,497 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) [2023-11-22 18:03:47,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:03:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:47,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 18:03:47,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:03:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:03:47,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:03:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:03:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817220111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:03:47,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:03:47,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-22 18:03:47,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101922653] [2023-11-22 18:03:47,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:03:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:03:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:03:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:03:47,664 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:47,780 INFO L93 Difference]: Finished difference Result 149 states and 205 transitions. [2023-11-22 18:03:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 18:03:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-22 18:03:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:47,784 INFO L225 Difference]: With dead ends: 149 [2023-11-22 18:03:47,784 INFO L226 Difference]: Without dead ends: 117 [2023-11-22 18:03:47,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2023-11-22 18:03:47,786 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 197 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:47,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 91 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:03:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-22 18:03:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 53. [2023-11-22 18:03:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:03:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2023-11-22 18:03:47,804 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 26 [2023-11-22 18:03:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:47,804 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2023-11-22 18:03:47,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2023-11-22 18:03:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 18:03:47,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:47,809 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:47,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 18:03:48,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:48,021 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:48,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash 548387529, now seen corresponding path program 2 times [2023-11-22 18:03:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:48,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844546556] [2023-11-22 18:03:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 18:03:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:48,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844546556] [2023-11-22 18:03:48,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844546556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:03:48,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481728708] [2023-11-22 18:03:48,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:03:48,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:48,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:03:48,236 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) [2023-11-22 18:03:48,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:03:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:03:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:03:48,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 18:03:48,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:03:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 18:03:48,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:03:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 18:03:48,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481728708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:03:48,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:03:48,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-22 18:03:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001906896] [2023-11-22 18:03:48,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:03:48,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 18:03:48,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 18:03:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:03:48,482 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:48,631 INFO L93 Difference]: Finished difference Result 216 states and 297 transitions. [2023-11-22 18:03:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 18:03:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-22 18:03:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:48,633 INFO L225 Difference]: With dead ends: 216 [2023-11-22 18:03:48,633 INFO L226 Difference]: Without dead ends: 175 [2023-11-22 18:03:48,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:03:48,634 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 247 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:48,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 59 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:03:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-22 18:03:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 65. [2023-11-22 18:03:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:03:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2023-11-22 18:03:48,642 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 39 [2023-11-22 18:03:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:48,642 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2023-11-22 18:03:48,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2023-11-22 18:03:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-22 18:03:48,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:48,644 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:48,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 18:03:48,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:48,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:48,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash 756712201, now seen corresponding path program 3 times [2023-11-22 18:03:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:48,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201793870] [2023-11-22 18:03:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 18:03:49,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:49,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201793870] [2023-11-22 18:03:49,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201793870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:03:49,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568798548] [2023-11-22 18:03:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:03:49,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:03:49,333 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) [2023-11-22 18:03:49,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:03:49,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 18:03:49,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:03:49,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 18:03:49,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:03:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-11-22 18:03:49,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:03:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-11-22 18:03:49,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568798548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:03:49,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:03:49,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5, 5] total 31 [2023-11-22 18:03:49,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560786343] [2023-11-22 18:03:49,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:03:49,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 18:03:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:49,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 18:03:49,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-11-22 18:03:49,494 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:49,711 INFO L93 Difference]: Finished difference Result 284 states and 388 transitions. [2023-11-22 18:03:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-22 18:03:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-22 18:03:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:49,713 INFO L225 Difference]: With dead ends: 284 [2023-11-22 18:03:49,713 INFO L226 Difference]: Without dead ends: 243 [2023-11-22 18:03:49,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2023-11-22 18:03:49,714 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 946 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:49,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 120 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:03:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-22 18:03:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 126. [2023-11-22 18:03:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 123 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:03:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 163 transitions. [2023-11-22 18:03:49,724 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 163 transitions. Word has length 51 [2023-11-22 18:03:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:49,725 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 163 transitions. [2023-11-22 18:03:49,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 163 transitions. [2023-11-22 18:03:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-22 18:03:49,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:49,726 INFO L195 NwaCegarLoop]: trace histogram [23, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:49,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:03:49,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:49,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:49,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1458579528, now seen corresponding path program 4 times [2023-11-22 18:03:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474217713] [2023-11-22 18:03:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:49,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:03:50,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:50,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474217713] [2023-11-22 18:03:50,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474217713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:03:50,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933565657] [2023-11-22 18:03:50,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:03:50,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:50,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:03:50,483 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) [2023-11-22 18:03:50,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 18:03:50,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:03:50,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:03:50,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:03:50,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:03:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-22 18:03:50,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:03:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-22 18:03:50,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933565657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:03:50,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:03:50,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 40 [2023-11-22 18:03:50,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254875864] [2023-11-22 18:03:50,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:03:50,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-22 18:03:50,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:03:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-22 18:03:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2023-11-22 18:03:50,944 INFO L87 Difference]: Start difference. First operand 126 states and 163 transitions. Second operand has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:03:51,335 INFO L93 Difference]: Finished difference Result 470 states and 656 transitions. [2023-11-22 18:03:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-22 18:03:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-11-22 18:03:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:03:51,337 INFO L225 Difference]: With dead ends: 470 [2023-11-22 18:03:51,337 INFO L226 Difference]: Without dead ends: 369 [2023-11-22 18:03:51,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1004, Invalid=1858, Unknown=0, NotChecked=0, Total=2862 [2023-11-22 18:03:51,339 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 993 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:03:51,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 221 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:03:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-22 18:03:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 247. [2023-11-22 18:03:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.3524590163934427) internal successors, (330), 244 states have internal predecessors, (330), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:03:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 332 transitions. [2023-11-22 18:03:51,351 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 332 transitions. Word has length 80 [2023-11-22 18:03:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:03:51,352 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 332 transitions. [2023-11-22 18:03:51,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:03:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 332 transitions. [2023-11-22 18:03:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-22 18:03:51,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:03:51,354 INFO L195 NwaCegarLoop]: trace histogram [24, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:03:51,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 18:03:51,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:51,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:03:51,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:03:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash -805865627, now seen corresponding path program 5 times [2023-11-22 18:03:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:03:51,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554022443] [2023-11-22 18:03:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:03:51,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:03:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:03:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2023-11-22 18:03:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:03:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554022443] [2023-11-22 18:03:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554022443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:03:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325237018] [2023-11-22 18:03:52,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:03:52,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:03:52,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:03:52,369 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) [2023-11-22 18:03:52,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process Killed by 15