./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 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/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 17:42:40,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 17:42:40,246 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 17:42:40,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 17:42:40,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 17:42:40,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 17:42:40,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 17:42:40,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 17:42:40,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 17:42:40,283 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 17:42:40,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 17:42:40,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 17:42:40,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 17:42:40,286 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 17:42:40,286 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 17:42:40,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 17:42:40,287 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 17:42:40,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 17:42:40,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 17:42:40,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 17:42:40,291 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 17:42:40,292 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 17:42:40,292 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 17:42:40,293 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 17:42:40,293 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 17:42:40,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 17:42:40,294 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 17:42:40,294 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 17:42:40,294 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 17:42:40,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 17:42:40,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 17:42:40,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 17:42:40,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 17:42:40,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:42:40,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 17:42:40,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 17:42:40,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 17:42:40,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 17:42:40,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 17:42:40,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 17:42:40,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 17:42:40,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 17:42:40,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 [2024-10-14 17:42:40,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 17:42:40,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 17:42:40,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 17:42:40,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 17:42:40,579 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 17:42:40,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2024-10-14 17:42:41,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 17:42:42,177 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 17:42:42,178 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2024-10-14 17:42:42,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19ffcbfb/46e66af8cfc944bf89d24d2a6ed46b0d/FLAG7e859b97a [2024-10-14 17:42:42,561 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19ffcbfb/46e66af8cfc944bf89d24d2a6ed46b0d [2024-10-14 17:42:42,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 17:42:42,564 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 17:42:42,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 17:42:42,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 17:42:42,570 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 17:42:42,571 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,572 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb20648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42, skipping insertion in model container [2024-10-14 17:42:42,572 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,594 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 17:42:42,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:42:42,779 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 17:42:42,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:42:42,819 INFO L204 MainTranslator]: Completed translation [2024-10-14 17:42:42,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42 WrapperNode [2024-10-14 17:42:42,819 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 17:42:42,820 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 17:42:42,820 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 17:42:42,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 17:42:42,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,858 INFO L138 Inliner]: procedures = 18, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 166 [2024-10-14 17:42:42,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 17:42:42,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 17:42:42,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 17:42:42,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 17:42:42,869 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,891 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 9, 3]. 64 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-10-14 17:42:42,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,896 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,909 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,910 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 17:42:42,913 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 17:42:42,913 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 17:42:42,913 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 17:42:42,914 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (1/1) ... [2024-10-14 17:42:42,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:42:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:42,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 17:42:42,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 17:42:42,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 17:42:42,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 17:42:42,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 17:42:42,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 17:42:42,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 17:42:42,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 17:42:42,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 17:42:42,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 17:42:42,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 17:42:42,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 17:42:42,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 17:42:42,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 17:42:42,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 17:42:42,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 17:42:42,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 17:42:42,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 17:42:43,058 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 17:42:43,060 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 17:42:43,388 INFO L? ?]: Removed 86 outVars from TransFormulas that were not future-live. [2024-10-14 17:42:43,388 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 17:42:43,442 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 17:42:43,442 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-14 17:42:43,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:42:43 BoogieIcfgContainer [2024-10-14 17:42:43,443 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 17:42:43,445 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 17:42:43,445 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 17:42:43,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 17:42:43,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:42:42" (1/3) ... [2024-10-14 17:42:43,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de6ae8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:42:43, skipping insertion in model container [2024-10-14 17:42:43,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:42" (2/3) ... [2024-10-14 17:42:43,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de6ae8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:42:43, skipping insertion in model container [2024-10-14 17:42:43,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:42:43" (3/3) ... [2024-10-14 17:42:43,452 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2024-10-14 17:42:43,472 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 17:42:43,472 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2024-10-14 17:42:43,523 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 17:42:43,531 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@33403679, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 17:42:43,531 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-10-14 17:42:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 73 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 17:42:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-14 17:42:43,542 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:43,543 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-14 17:42:43,544 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:43,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash 256909, now seen corresponding path program 1 times [2024-10-14 17:42:43,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:43,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015721295] [2024-10-14 17:42:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:43,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:43,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:43,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015721295] [2024-10-14 17:42:43,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015721295] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:43,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:43,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 17:42:43,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399130344] [2024-10-14 17:42:43,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:43,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:42:43,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:42:43,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:42:43,827 INFO L87 Difference]: Start difference. First operand has 78 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 73 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:43,926 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2024-10-14 17:42:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:42:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-10-14 17:42:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:43,936 INFO L225 Difference]: With dead ends: 70 [2024-10-14 17:42:43,936 INFO L226 Difference]: Without dead ends: 69 [2024-10-14 17:42:43,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:42:43,941 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 58 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:43,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-14 17:42:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-14 17:42:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 64 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 17:42:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-10-14 17:42:43,973 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 3 [2024-10-14 17:42:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:43,973 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-10-14 17:42:43,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-10-14 17:42:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-14 17:42:43,974 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:43,974 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-14 17:42:43,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 17:42:43,975 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:43,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:43,975 INFO L85 PathProgramCache]: Analyzing trace with hash 256910, now seen corresponding path program 1 times [2024-10-14 17:42:43,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:43,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445328371] [2024-10-14 17:42:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445328371] [2024-10-14 17:42:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445328371] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:44,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:44,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 17:42:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931444795] [2024-10-14 17:42:44,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:44,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:42:44,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:42:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:42:44,118 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:44,218 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2024-10-14 17:42:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:42:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-10-14 17:42:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:44,220 INFO L225 Difference]: With dead ends: 71 [2024-10-14 17:42:44,220 INFO L226 Difference]: Without dead ends: 71 [2024-10-14 17:42:44,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:42:44,222 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:44,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-14 17:42:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-10-14 17:42:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.625) internal successors, (78), 66 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 17:42:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2024-10-14 17:42:44,236 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 3 [2024-10-14 17:42:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:44,237 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2024-10-14 17:42:44,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2024-10-14 17:42:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-14 17:42:44,238 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:44,238 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-10-14 17:42:44,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 17:42:44,239 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:44,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 247108980, now seen corresponding path program 1 times [2024-10-14 17:42:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:44,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048418753] [2024-10-14 17:42:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048418753] [2024-10-14 17:42:44,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048418753] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:44,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245719283] [2024-10-14 17:42:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:44,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:44,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:44,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:44,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 17:42:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:44,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 17:42:44,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:44,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:42:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:44,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:44,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245719283] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:44,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:44,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-14 17:42:44,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037429562] [2024-10-14 17:42:44,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:44,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:42:44,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:42:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:42:44,673 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:44,833 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2024-10-14 17:42:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:42:44,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-14 17:42:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:44,835 INFO L225 Difference]: With dead ends: 86 [2024-10-14 17:42:44,835 INFO L226 Difference]: Without dead ends: 86 [2024-10-14 17:42:44,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:42:44,836 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:44,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 135 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-14 17:42:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-10-14 17:42:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 78 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 17:42:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2024-10-14 17:42:44,845 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 5 [2024-10-14 17:42:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:44,845 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2024-10-14 17:42:44,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2024-10-14 17:42:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 17:42:44,846 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:44,846 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:44,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 17:42:45,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:45,047 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:45,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1587345124, now seen corresponding path program 1 times [2024-10-14 17:42:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:45,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939573212] [2024-10-14 17:42:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:42:45,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:45,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939573212] [2024-10-14 17:42:45,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939573212] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:45,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:45,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:42:45,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633936827] [2024-10-14 17:42:45,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:45,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:42:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:42:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:42:45,116 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:45,175 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2024-10-14 17:42:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:42:45,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-14 17:42:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:45,177 INFO L225 Difference]: With dead ends: 93 [2024-10-14 17:42:45,177 INFO L226 Difference]: Without dead ends: 93 [2024-10-14 17:42:45,177 INFO L431 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 [2024-10-14 17:42:45,178 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 32 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:45,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:45,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-14 17:42:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2024-10-14 17:42:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 82 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2024-10-14 17:42:45,185 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 10 [2024-10-14 17:42:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:45,185 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2024-10-14 17:42:45,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2024-10-14 17:42:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:42:45,186 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:45,186 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:45,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 17:42:45,187 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:45,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1963100095, now seen corresponding path program 1 times [2024-10-14 17:42:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:45,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018782270] [2024-10-14 17:42:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:45,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:42:45,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:45,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018782270] [2024-10-14 17:42:45,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018782270] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:45,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:45,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:42:45,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249162645] [2024-10-14 17:42:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:45,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:42:45,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:45,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:42:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:42:45,248 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:45,284 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2024-10-14 17:42:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:42:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:42:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:45,285 INFO L225 Difference]: With dead ends: 83 [2024-10-14 17:42:45,285 INFO L226 Difference]: Without dead ends: 83 [2024-10-14 17:42:45,286 INFO L431 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 [2024-10-14 17:42:45,287 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:45,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-14 17:42:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-14 17:42:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 79 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2024-10-14 17:42:45,292 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 11 [2024-10-14 17:42:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:45,292 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2024-10-14 17:42:45,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2024-10-14 17:42:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:42:45,294 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:45,294 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:45,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 17:42:45,294 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:45,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1963100094, now seen corresponding path program 1 times [2024-10-14 17:42:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:45,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538346724] [2024-10-14 17:42:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:45,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538346724] [2024-10-14 17:42:45,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538346724] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:45,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929386135] [2024-10-14 17:42:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:45,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:45,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:45,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:45,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 17:42:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:45,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 17:42:45,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:45,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:45,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929386135] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:45,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:45,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-14 17:42:45,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243599631] [2024-10-14 17:42:45,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:45,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 17:42:45,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:45,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 17:42:45,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:42:45,477 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:45,680 INFO L93 Difference]: Finished difference Result 206 states and 286 transitions. [2024-10-14 17:42:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:42:45,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:42:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:45,682 INFO L225 Difference]: With dead ends: 206 [2024-10-14 17:42:45,682 INFO L226 Difference]: Without dead ends: 206 [2024-10-14 17:42:45,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:42:45,683 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:45,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 169 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:42:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-10-14 17:42:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 86. [2024-10-14 17:42:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 82 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-10-14 17:42:45,693 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 11 [2024-10-14 17:42:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:45,694 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-10-14 17:42:45,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-10-14 17:42:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:42:45,695 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:45,695 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-10-14 17:42:45,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 17:42:45,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 17:42:45,896 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:45,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1702966746, now seen corresponding path program 2 times [2024-10-14 17:42:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803710513] [2024-10-14 17:42:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:46,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803710513] [2024-10-14 17:42:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803710513] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:46,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606216210] [2024-10-14 17:42:46,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:42:46,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:46,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:46,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:46,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 17:42:46,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:42:46,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:42:46,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 17:42:46,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:46,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:42:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:46,350 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:42:46,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606216210] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:46,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:42:46,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-14 17:42:46,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194212060] [2024-10-14 17:42:46,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:46,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 17:42:46,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:46,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 17:42:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:42:46,351 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:46,423 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2024-10-14 17:42:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:42:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:42:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:46,424 INFO L225 Difference]: With dead ends: 85 [2024-10-14 17:42:46,424 INFO L226 Difference]: Without dead ends: 85 [2024-10-14 17:42:46,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:42:46,425 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:46,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-14 17:42:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-10-14 17:42:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 81 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2024-10-14 17:42:46,431 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 11 [2024-10-14 17:42:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:46,431 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2024-10-14 17:42:46,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2024-10-14 17:42:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 17:42:46,432 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:46,432 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:46,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 17:42:46,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:46,637 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:46,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1817984730, now seen corresponding path program 2 times [2024-10-14 17:42:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044797947] [2024-10-14 17:42:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:46,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:46,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044797947] [2024-10-14 17:42:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044797947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329290137] [2024-10-14 17:42:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:42:46,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:46,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:46,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:46,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 17:42:46,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 17:42:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:42:46,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 17:42:46,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:46,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:42:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-14 17:42:46,853 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:42:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329290137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:46,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:42:46,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-10-14 17:42:46,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491610994] [2024-10-14 17:42:46,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:46,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:42:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:42:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-10-14 17:42:46,855 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:46,903 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-10-14 17:42:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:42:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-14 17:42:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:46,904 INFO L225 Difference]: With dead ends: 87 [2024-10-14 17:42:46,904 INFO L226 Difference]: Without dead ends: 87 [2024-10-14 17:42:46,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-10-14 17:42:46,905 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:46,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-14 17:42:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-10-14 17:42:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.4366197183098592) internal successors, (102), 83 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-10-14 17:42:46,916 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 19 [2024-10-14 17:42:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:46,916 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-10-14 17:42:46,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-10-14 17:42:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:42:46,917 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:46,917 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:46,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 17:42:47,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:47,118 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:47,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash -968196663, now seen corresponding path program 1 times [2024-10-14 17:42:47,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139207007] [2024-10-14 17:42:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:42:47,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:47,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139207007] [2024-10-14 17:42:47,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139207007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:47,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740905029] [2024-10-14 17:42:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:47,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:47,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:47,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:47,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 17:42:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:47,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 17:42:47,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:42:47,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:42:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740905029] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:47,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:47,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-14 17:42:47,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968293298] [2024-10-14 17:42:47,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:47,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 17:42:47,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 17:42:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:42:47,482 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:47,806 INFO L93 Difference]: Finished difference Result 383 states and 542 transitions. [2024-10-14 17:42:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 17:42:47,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-14 17:42:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:47,808 INFO L225 Difference]: With dead ends: 383 [2024-10-14 17:42:47,808 INFO L226 Difference]: Without dead ends: 383 [2024-10-14 17:42:47,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:42:47,809 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 575 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:47,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 223 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:42:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-10-14 17:42:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 103. [2024-10-14 17:42:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 99 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2024-10-14 17:42:47,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 21 [2024-10-14 17:42:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:47,829 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2024-10-14 17:42:47,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2024-10-14 17:42:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 17:42:47,830 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:47,830 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:47,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 17:42:48,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:48,032 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:48,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1093191943, now seen corresponding path program 2 times [2024-10-14 17:42:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:48,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627508747] [2024-10-14 17:42:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:48,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:42:48,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:48,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627508747] [2024-10-14 17:42:48,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627508747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:48,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262019820] [2024-10-14 17:42:48,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:42:48,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:48,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:48,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 17:42:48,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:42:48,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:42:48,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 17:42:48,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:42:48,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:42:48,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262019820] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:48,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:48,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-14 17:42:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326815741] [2024-10-14 17:42:48,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:48,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 17:42:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 17:42:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 17:42:48,887 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:49,628 INFO L93 Difference]: Finished difference Result 735 states and 1054 transitions. [2024-10-14 17:42:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-14 17:42:49,629 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-14 17:42:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:49,632 INFO L225 Difference]: With dead ends: 735 [2024-10-14 17:42:49,633 INFO L226 Difference]: Without dead ends: 735 [2024-10-14 17:42:49,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 17:42:49,634 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 1626 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:49,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 351 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 17:42:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-10-14 17:42:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 135. [2024-10-14 17:42:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 131 states have internal predecessors, (150), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2024-10-14 17:42:49,658 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 37 [2024-10-14 17:42:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:49,658 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2024-10-14 17:42:49,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2024-10-14 17:42:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 17:42:49,660 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:49,660 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:49,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 17:42:49,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:49,861 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:49,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1216842073, now seen corresponding path program 3 times [2024-10-14 17:42:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:49,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914642205] [2024-10-14 17:42:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:49,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:42:50,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:50,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914642205] [2024-10-14 17:42:50,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914642205] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226764540] [2024-10-14 17:42:50,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:42:50,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:50,895 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:50,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 17:42:50,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 17:42:50,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:42:50,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 17:42:50,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:51,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:42:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2024-10-14 17:42:51,089 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:42:51,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226764540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:51,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:42:51,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [32] total 36 [2024-10-14 17:42:51,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911444773] [2024-10-14 17:42:51,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:51,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:51,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:51,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:51,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:42:51,092 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:51,138 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2024-10-14 17:42:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-10-14 17:42:51,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:51,140 INFO L225 Difference]: With dead ends: 134 [2024-10-14 17:42:51,140 INFO L226 Difference]: Without dead ends: 134 [2024-10-14 17:42:51,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:42:51,141 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:51,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-14 17:42:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2024-10-14 17:42:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 129 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 17:42:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2024-10-14 17:42:51,150 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 69 [2024-10-14 17:42:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:51,150 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2024-10-14 17:42:51,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:42:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2024-10-14 17:42:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-14 17:42:51,153 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:51,153 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:51,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 17:42:51,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:51,354 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:42:51,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1154077349, now seen corresponding path program 1 times [2024-10-14 17:42:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:51,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171858231] [2024-10-14 17:42:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2024-10-14 17:42:51,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171858231] [2024-10-14 17:42:51,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171858231] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:51,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131412100] [2024-10-14 17:42:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:51,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:51,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:51,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:42:51,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 17:42:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:51,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 17:42:51,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:52,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:53,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131412100] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:53,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:53,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 32, 32] total 66 [2024-10-14 17:42:53,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142339742] [2024-10-14 17:42:53,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:53,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-14 17:42:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-14 17:42:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2024-10-14 17:42:53,494 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 66 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:01,970 INFO L93 Difference]: Finished difference Result 2748 states and 4031 transitions. [2024-10-14 17:43:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2024-10-14 17:43:01,971 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 66 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-10-14 17:43:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:01,984 INFO L225 Difference]: With dead ends: 2748 [2024-10-14 17:43:01,984 INFO L226 Difference]: Without dead ends: 2748 [2024-10-14 17:43:01,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8558 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12096, Invalid=23814, Unknown=0, NotChecked=0, Total=35910 [2024-10-14 17:43:01,993 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 7625 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 1478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7751 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1478 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:01,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7751 Valid, 738 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1478 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-14 17:43:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2024-10-14 17:43:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 225. [2024-10-14 17:43:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 209 states have (on average 1.2105263157894737) internal successors, (253), 220 states have internal predecessors, (253), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 17:43:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 259 transitions. [2024-10-14 17:43:02,049 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 259 transitions. Word has length 71 [2024-10-14 17:43:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:02,049 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 259 transitions. [2024-10-14 17:43:02,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 66 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 259 transitions. [2024-10-14 17:43:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-10-14 17:43:02,054 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:02,054 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:02,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 17:43:02,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-14 17:43:02,259 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:43:02,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 682697428, now seen corresponding path program 2 times [2024-10-14 17:43:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:02,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985510616] [2024-10-14 17:43:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3845 trivial. 0 not checked. [2024-10-14 17:43:02,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985510616] [2024-10-14 17:43:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985510616] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128068021] [2024-10-14 17:43:02,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:43:02,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:02,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:02,580 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:43:02,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 17:43:02,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 17:43:02,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:02,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 17:43:02,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:02,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:43:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2024-10-14 17:43:02,742 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:43:02,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128068021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:43:02,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:43:02,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-10-14 17:43:02,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863693188] [2024-10-14 17:43:02,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:43:02,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:43:02,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:43:02,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:43:02,744 INFO L87 Difference]: Start difference. First operand 225 states and 259 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:02,815 INFO L93 Difference]: Finished difference Result 231 states and 257 transitions. [2024-10-14 17:43:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:43:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2024-10-14 17:43:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:02,817 INFO L225 Difference]: With dead ends: 231 [2024-10-14 17:43:02,817 INFO L226 Difference]: Without dead ends: 231 [2024-10-14 17:43:02,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:43:02,817 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:02,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:43:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-14 17:43:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2024-10-14 17:43:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 209 states have (on average 1.200956937799043) internal successors, (251), 220 states have internal predecessors, (251), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 17:43:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 257 transitions. [2024-10-14 17:43:02,822 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 257 transitions. Word has length 137 [2024-10-14 17:43:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:02,823 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 257 transitions. [2024-10-14 17:43:02,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 257 transitions. [2024-10-14 17:43:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-10-14 17:43:02,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:02,824 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:02,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:03,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 17:43:03,025 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:43:03,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1057625689, now seen corresponding path program 1 times [2024-10-14 17:43:03,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:03,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341043198] [2024-10-14 17:43:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:03,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2024-10-14 17:43:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341043198] [2024-10-14 17:43:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341043198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:43:03,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:43:03,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:43:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591781910] [2024-10-14 17:43:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:43:03,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:43:03,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:43:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:43:03,332 INFO L87 Difference]: Start difference. First operand 225 states and 257 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:03,375 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2024-10-14 17:43:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:43:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2024-10-14 17:43:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:03,376 INFO L225 Difference]: With dead ends: 224 [2024-10-14 17:43:03,377 INFO L226 Difference]: Without dead ends: 224 [2024-10-14 17:43:03,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:43:03,377 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:03,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:43:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-10-14 17:43:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2024-10-14 17:43:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 205 states have (on average 1.1658536585365853) internal successors, (239), 216 states have internal predecessors, (239), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 17:43:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2024-10-14 17:43:03,383 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 139 [2024-10-14 17:43:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:03,383 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2024-10-14 17:43:03,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2024-10-14 17:43:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-14 17:43:03,384 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:03,384 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:03,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-14 17:43:03,385 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:43:03,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash 410844167, now seen corresponding path program 1 times [2024-10-14 17:43:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197499408] [2024-10-14 17:43:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:03,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2024-10-14 17:43:03,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:03,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197499408] [2024-10-14 17:43:03,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197499408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:43:03,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:43:03,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:43:03,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255290961] [2024-10-14 17:43:03,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:43:03,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:43:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:03,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:43:03,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:43:03,569 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:03,580 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2024-10-14 17:43:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:43:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-10-14 17:43:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:03,582 INFO L225 Difference]: With dead ends: 160 [2024-10-14 17:43:03,582 INFO L226 Difference]: Without dead ends: 160 [2024-10-14 17:43:03,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:43:03,582 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:03,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:43:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-14 17:43:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-10-14 17:43:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2024-10-14 17:43:03,587 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 143 [2024-10-14 17:43:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:03,587 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2024-10-14 17:43:03,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2024-10-14 17:43:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-10-14 17:43:03,589 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:03,589 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:03,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-14 17:43:03,589 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:43:03,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -951061960, now seen corresponding path program 1 times [2024-10-14 17:43:03,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:03,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32724699] [2024-10-14 17:43:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:43:06,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:06,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32724699] [2024-10-14 17:43:06,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32724699] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:06,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875036402] [2024-10-14 17:43:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:06,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:06,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:06,387 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:43:06,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 17:43:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:06,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-14 17:43:06,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:43:06,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:43:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875036402] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:11,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:11,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 128 [2024-10-14 17:43:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980524355] [2024-10-14 17:43:11,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:11,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-10-14 17:43:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-10-14 17:43:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-10-14 17:43:11,154 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 129 states, 129 states have (on average 2.108527131782946) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:11,498 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2024-10-14 17:43:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-10-14 17:43:11,499 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.108527131782946) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2024-10-14 17:43:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:11,500 INFO L225 Difference]: With dead ends: 288 [2024-10-14 17:43:11,500 INFO L226 Difference]: Without dead ends: 288 [2024-10-14 17:43:11,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-10-14 17:43:11,503 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:11,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:43:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-10-14 17:43:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2024-10-14 17:43:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 286 states have (on average 1.013986013986014) internal successors, (290), 287 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2024-10-14 17:43:11,508 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 146 [2024-10-14 17:43:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:11,509 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2024-10-14 17:43:11,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.108527131782946) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:11,509 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2024-10-14 17:43:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-10-14 17:43:11,511 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:11,512 INFO L215 NwaCegarLoop]: trace histogram [126, 126, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:11,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:11,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 17:43:11,712 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:43:11,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -544401224, now seen corresponding path program 2 times [2024-10-14 17:43:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:11,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471969033] [2024-10-14 17:43:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:11,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 15882 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:43:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471969033] [2024-10-14 17:43:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471969033] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245876760] [2024-10-14 17:43:21,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:43:21,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:21,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:43:21,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 17:43:21,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:43:21,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:21,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-14 17:43:21,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15882 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:43:21,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15882 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:43:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245876760] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:37,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:37,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 256 [2024-10-14 17:43:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337186984] [2024-10-14 17:43:37,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:37,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2024-10-14 17:43:37,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2024-10-14 17:43:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2024-10-14 17:43:37,614 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand has 257 states, 257 states have (on average 2.054474708171206) internal successors, (528), 256 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:38,625 INFO L93 Difference]: Finished difference Result 544 states and 546 transitions. [2024-10-14 17:43:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2024-10-14 17:43:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 2.054474708171206) internal successors, (528), 256 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2024-10-14 17:43:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:38,627 INFO L225 Difference]: With dead ends: 544 [2024-10-14 17:43:38,627 INFO L226 Difference]: Without dead ends: 544 [2024-10-14 17:43:38,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2024-10-14 17:43:38,632 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:38,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:43:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2024-10-14 17:43:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2024-10-14 17:43:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.007380073800738) internal successors, (546), 543 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 546 transitions. [2024-10-14 17:43:38,640 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 546 transitions. Word has length 274 [2024-10-14 17:43:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:38,640 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 546 transitions. [2024-10-14 17:43:38,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 2.054474708171206) internal successors, (528), 256 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 546 transitions. [2024-10-14 17:43:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2024-10-14 17:43:38,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:38,648 INFO L215 NwaCegarLoop]: trace histogram [254, 254, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:38,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 17:43:38,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 17:43:38,848 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 17:43:38,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash -984652360, now seen corresponding path program 3 times [2024-10-14 17:43:38,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:38,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856580475] [2024-10-14 17:43:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:38,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat