./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/memsafety/960521-1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/memsafety/960521-1-2.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 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 16:34:31,050 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 16:34:31,110 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 16:34:31,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 16:34:31,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 16:34:31,145 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 16:34:31,145 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 16:34:31,145 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 16:34:31,146 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 16:34:31,150 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 16:34:31,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 16:34:31,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 16:34:31,152 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 16:34:31,153 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 16:34:31,153 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 16:34:31,154 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 16:34:31,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 16:34:31,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 16:34:31,154 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 16:34:31,154 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 16:34:31,155 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 16:34:31,155 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 16:34:31,155 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 16:34:31,155 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 16:34:31,156 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 16:34:31,156 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 16:34:31,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 16:34:31,157 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 16:34:31,157 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 16:34:31,157 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 16:34:31,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 16:34:31,158 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 16:34:31,158 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 16:34:31,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 16:34:31,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 16:34:31,159 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 16:34:31,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 16:34:31,159 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 16:34:31,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 16:34:31,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 [2023-11-22 16:34:31,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 16:34:31,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 16:34:31,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 16:34:31,399 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 16:34:31,400 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 16:34:31,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1-2.i [2023-11-22 16:34:32,421 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 16:34:32,662 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 16:34:32,666 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/memsafety/960521-1-2.i [2023-11-22 16:34:32,693 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b9c5b7a7/f8467d41da484a18840e3aa44a7d40b8/FLAGd1d5a555a [2023-11-22 16:34:32,723 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b9c5b7a7/f8467d41da484a18840e3aa44a7d40b8 [2023-11-22 16:34:32,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 16:34:32,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 16:34:32,737 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 16:34:32,737 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 16:34:32,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 16:34:32,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:34:32" (1/1) ... [2023-11-22 16:34:32,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@483616f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:32, skipping insertion in model container [2023-11-22 16:34:32,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:34:32" (1/1) ... [2023-11-22 16:34:32,804 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 16:34:33,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 16:34:33,197 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 16:34:33,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 16:34:33,296 INFO L206 MainTranslator]: Completed translation [2023-11-22 16:34:33,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33 WrapperNode [2023-11-22 16:34:33,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 16:34:33,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 16:34:33,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 16:34:33,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 16:34:33,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,377 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-22 16:34:33,383 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 16:34:33,383 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 16:34:33,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 16:34:33,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 16:34:33,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,417 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,437 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,439 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,441 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 16:34:33,452 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 16:34:33,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 16:34:33,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 16:34:33,453 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (1/1) ... [2023-11-22 16:34:33,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 16:34:33,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:33,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 16:34:33,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 16:34:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 16:34:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 16:34:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 16:34:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 16:34:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 16:34:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 16:34:33,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 16:34:33,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 16:34:33,682 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 16:34:33,684 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 16:34:33,847 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 16:34:33,878 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 16:34:33,887 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 16:34:33,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:34:33 BoogieIcfgContainer [2023-11-22 16:34:33,887 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 16:34:33,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 16:34:33,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 16:34:33,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 16:34:33,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:34:32" (1/3) ... [2023-11-22 16:34:33,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab3a2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:34:33, skipping insertion in model container [2023-11-22 16:34:33,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:34:33" (2/3) ... [2023-11-22 16:34:33,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab3a2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:34:33, skipping insertion in model container [2023-11-22 16:34:33,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:34:33" (3/3) ... [2023-11-22 16:34:33,897 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1-2.i [2023-11-22 16:34:33,910 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 16:34:33,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-11-22 16:34:33,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 16:34:33,951 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6f6ccefb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 16:34:33,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-22 16:34:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 45 states have internal predecessors, (50), 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) [2023-11-22 16:34:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-22 16:34:33,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:33,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-22 16:34:33,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:33,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash 3445, now seen corresponding path program 1 times [2023-11-22 16:34:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789526470] [2023-11-22 16:34:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:34,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:34,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789526470] [2023-11-22 16:34:34,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789526470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:34:34,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:34:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:34:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928638802] [2023-11-22 16:34:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:34:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:34:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:34:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:34:34,197 INFO L87 Difference]: Start difference. First operand has 46 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 45 states have internal predecessors, (50), 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-22 16:34:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:34,310 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-11-22 16:34:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:34:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-22 16:34:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:34,318 INFO L225 Difference]: With dead ends: 45 [2023-11-22 16:34:34,318 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 16:34:34,319 INFO L412 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 [2023-11-22 16:34:34,324 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:34,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:34:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 16:34:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-22 16:34:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 43 states have internal predecessors, (46), 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) [2023-11-22 16:34:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-11-22 16:34:34,353 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 2 [2023-11-22 16:34:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:34,353 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-11-22 16:34:34,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-22 16:34:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-11-22 16:34:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-22 16:34:34,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:34,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-22 16:34:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 16:34:34,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:34,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash 3446, now seen corresponding path program 1 times [2023-11-22 16:34:34,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:34,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610366206] [2023-11-22 16:34:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:34,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610366206] [2023-11-22 16:34:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610366206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:34:34,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:34:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:34:34,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557393718] [2023-11-22 16:34:34,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:34:34,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:34:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:34:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:34:34,517 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-22 16:34:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:34,546 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2023-11-22 16:34:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:34:34,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-22 16:34:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:34,547 INFO L225 Difference]: With dead ends: 43 [2023-11-22 16:34:34,548 INFO L226 Difference]: Without dead ends: 43 [2023-11-22 16:34:34,551 INFO L412 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 [2023-11-22 16:34:34,554 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:34,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 16:34:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-22 16:34:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-22 16:34:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.875) internal successors, (45), 42 states have internal predecessors, (45), 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) [2023-11-22 16:34:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-11-22 16:34:34,562 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 2 [2023-11-22 16:34:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:34,562 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-11-22 16:34:34,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-22 16:34:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-11-22 16:34:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-22 16:34:34,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:34,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-22 16:34:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 16:34:34,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:34,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash 3387014, now seen corresponding path program 1 times [2023-11-22 16:34:34,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:34,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158342759] [2023-11-22 16:34:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:34,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:34,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158342759] [2023-11-22 16:34:34,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158342759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:34:34,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:34:34,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 16:34:34,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900102697] [2023-11-22 16:34:34,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:34:34,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 16:34:34,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 16:34:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:34:34,643 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-22 16:34:34,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:34,682 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-22 16:34:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:34:34,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-22 16:34:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:34,683 INFO L225 Difference]: With dead ends: 40 [2023-11-22 16:34:34,683 INFO L226 Difference]: Without dead ends: 40 [2023-11-22 16:34:34,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:34:34,684 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:34,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 16:34:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-22 16:34:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-22 16:34:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.75) internal successors, (42), 39 states have internal predecessors, (42), 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) [2023-11-22 16:34:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-22 16:34:34,688 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 4 [2023-11-22 16:34:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:34,688 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-22 16:34:34,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-22 16:34:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-22 16:34:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-22 16:34:34,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:34,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-22 16:34:34,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 16:34:34,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:34,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash 3387015, now seen corresponding path program 1 times [2023-11-22 16:34:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086905238] [2023-11-22 16:34:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:34,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:34,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:34,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086905238] [2023-11-22 16:34:34,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086905238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:34:34,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:34:34,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 16:34:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596997873] [2023-11-22 16:34:34,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:34:34,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:34:34,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:34:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:34:34,935 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-11-22 16:34:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:35,017 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-11-22 16:34:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 16:34:35,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2023-11-22 16:34:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:35,019 INFO L225 Difference]: With dead ends: 47 [2023-11-22 16:34:35,020 INFO L226 Difference]: Without dead ends: 47 [2023-11-22 16:34:35,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:34:35,027 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:35,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:34:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-22 16:34:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2023-11-22 16:34:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 43 states have internal predecessors, (47), 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) [2023-11-22 16:34:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-11-22 16:34:35,038 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 4 [2023-11-22 16:34:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:35,039 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-11-22 16:34:35,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-11-22 16:34:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-11-22 16:34:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-22 16:34:35,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:35,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 16:34:35,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 16:34:35,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:35,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1040098703, now seen corresponding path program 1 times [2023-11-22 16:34:35,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:35,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15619546] [2023-11-22 16:34:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15619546] [2023-11-22 16:34:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15619546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:34:35,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:34:35,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 16:34:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011080755] [2023-11-22 16:34:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:34:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 16:34:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 16:34:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:34:35,097 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-22 16:34:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:35,121 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-11-22 16:34:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 16:34:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-22 16:34:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:35,123 INFO L225 Difference]: With dead ends: 46 [2023-11-22 16:34:35,124 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 16:34:35,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:34:35,124 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:35,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 64 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 16:34:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 16:34:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-11-22 16:34:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 42 states have internal predecessors, (45), 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) [2023-11-22 16:34:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-11-22 16:34:35,132 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2023-11-22 16:34:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:35,132 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-11-22 16:34:35,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-22 16:34:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-11-22 16:34:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-22 16:34:35,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:35,133 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-22 16:34:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 16:34:35,134 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:35,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1039982965, now seen corresponding path program 1 times [2023-11-22 16:34:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:35,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224768368] [2023-11-22 16:34:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:35,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:35,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224768368] [2023-11-22 16:34:35,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224768368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:35,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682421489] [2023-11-22 16:34:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:35,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:35,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:35,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:34:35,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 16:34:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:35,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 16:34:35,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:35,491 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-22 16:34:35,492 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-22 16:34:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:35,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:34:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:35,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682421489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:34:35,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:34:35,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-11-22 16:34:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68920046] [2023-11-22 16:34:35,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:34:35,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-22 16:34:35,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-22 16:34:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-22 16:34:35,676 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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) [2023-11-22 16:34:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:35,863 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2023-11-22 16:34:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 16:34:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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 6 [2023-11-22 16:34:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:35,864 INFO L225 Difference]: With dead ends: 51 [2023-11-22 16:34:35,864 INFO L226 Difference]: Without dead ends: 51 [2023-11-22 16:34:35,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-11-22 16:34:35,865 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:35,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 102 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:34:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-22 16:34:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-11-22 16:34:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.606060606060606) internal successors, (53), 48 states have internal predecessors, (53), 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) [2023-11-22 16:34:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-11-22 16:34:35,867 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 6 [2023-11-22 16:34:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:35,867 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-11-22 16:34:35,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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) [2023-11-22 16:34:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-11-22 16:34:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 16:34:35,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:35,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 16:34:35,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 16:34:36,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 16:34:36,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:36,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1165711495, now seen corresponding path program 1 times [2023-11-22 16:34:36,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:36,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577894022] [2023-11-22 16:34:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 16:34:36,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:36,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577894022] [2023-11-22 16:34:36,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577894022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:34:36,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:34:36,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 16:34:36,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493588383] [2023-11-22 16:34:36,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:34:36,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 16:34:36,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 16:34:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:34:36,105 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2023-11-22 16:34:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:36,132 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2023-11-22 16:34:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 16:34:36,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2023-11-22 16:34:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:36,133 INFO L225 Difference]: With dead ends: 47 [2023-11-22 16:34:36,133 INFO L226 Difference]: Without dead ends: 47 [2023-11-22 16:34:36,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:34:36,134 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:36,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 16:34:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-22 16:34:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-22 16:34:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 46 states have internal predecessors, (51), 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) [2023-11-22 16:34:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-22 16:34:36,136 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 10 [2023-11-22 16:34:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:36,136 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-22 16:34:36,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2023-11-22 16:34:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-22 16:34:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 16:34:36,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:36,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 16:34:36,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 16:34:36,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:36,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:36,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1165711494, now seen corresponding path program 1 times [2023-11-22 16:34:36,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:36,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422438238] [2023-11-22 16:34:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:36,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:36,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422438238] [2023-11-22 16:34:36,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422438238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:36,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476543797] [2023-11-22 16:34:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:36,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:36,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:34:36,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 16:34:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:36,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 16:34:36,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:36,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:34:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:36,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476543797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:34:36,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:34:36,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-22 16:34:36,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192685325] [2023-11-22 16:34:36,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:34:36,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 16:34:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 16:34:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2023-11-22 16:34:36,302 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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) [2023-11-22 16:34:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:36,381 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2023-11-22 16:34:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 16:34:36,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 [2023-11-22 16:34:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:36,382 INFO L225 Difference]: With dead ends: 65 [2023-11-22 16:34:36,382 INFO L226 Difference]: Without dead ends: 65 [2023-11-22 16:34:36,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2023-11-22 16:34:36,383 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 89 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:36,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 114 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:34:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-22 16:34:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2023-11-22 16:34:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 53 states have internal predecessors, (59), 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) [2023-11-22 16:34:36,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-11-22 16:34:36,386 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 10 [2023-11-22 16:34:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:36,386 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-11-22 16:34:36,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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) [2023-11-22 16:34:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-11-22 16:34:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-22 16:34:36,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:36,387 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2023-11-22 16:34:36,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 16:34:36,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-22 16:34:36,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:36,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash 849004695, now seen corresponding path program 2 times [2023-11-22 16:34:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:36,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640456029] [2023-11-22 16:34:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:36,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:36,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640456029] [2023-11-22 16:34:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640456029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:36,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302714515] [2023-11-22 16:34:36,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 16:34:36,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:36,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:36,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:34:36,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 16:34:36,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 16:34:36,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 16:34:36,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 16:34:36,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:36,919 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-22 16:34:36,919 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-22 16:34:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:37,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:34:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302714515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:34:37,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:34:37,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-22 16:34:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326260264] [2023-11-22 16:34:37,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:34:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 16:34:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 16:34:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-22 16:34:37,437 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2023-11-22 16:34:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:37,750 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2023-11-22 16:34:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 16:34:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 12 [2023-11-22 16:34:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:37,751 INFO L225 Difference]: With dead ends: 65 [2023-11-22 16:34:37,751 INFO L226 Difference]: Without dead ends: 65 [2023-11-22 16:34:37,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2023-11-22 16:34:37,752 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:37,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 150 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 16:34:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-22 16:34:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-11-22 16:34:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 56 states have internal predecessors, (63), 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) [2023-11-22 16:34:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-22 16:34:37,755 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 12 [2023-11-22 16:34:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:37,755 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-22 16:34:37,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2023-11-22 16:34:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-22 16:34:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-22 16:34:37,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:37,756 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2023-11-22 16:34:37,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 16:34:37,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:37,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:37,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash -200018550, now seen corresponding path program 2 times [2023-11-22 16:34:37,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:37,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973362340] [2023-11-22 16:34:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:34:38,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:38,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973362340] [2023-11-22 16:34:38,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973362340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:38,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879005621] [2023-11-22 16:34:38,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 16:34:38,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:38,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:34:38,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 16:34:38,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-22 16:34:38,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 16:34:38,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 16:34:38,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:38,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-22 16:34:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:34:38,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 16:34:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 16:34:38,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 16:34:38,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879005621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:34:38,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 16:34:38,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2023-11-22 16:34:38,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486552939] [2023-11-22 16:34:38,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:34:38,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:34:38,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:38,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:34:38,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-22 16:34:38,226 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-11-22 16:34:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:38,255 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2023-11-22 16:34:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 16:34:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 18 [2023-11-22 16:34:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:38,257 INFO L225 Difference]: With dead ends: 51 [2023-11-22 16:34:38,257 INFO L226 Difference]: Without dead ends: 51 [2023-11-22 16:34:38,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-22 16:34:38,258 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:38,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 16:34:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-22 16:34:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-22 16:34:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 50 states have internal predecessors, (55), 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) [2023-11-22 16:34:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-11-22 16:34:38,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 18 [2023-11-22 16:34:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:38,260 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-11-22 16:34:38,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-11-22 16:34:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-11-22 16:34:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 16:34:38,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:38,261 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 16:34:38,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 16:34:38,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:38,473 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:38,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1055746010, now seen corresponding path program 1 times [2023-11-22 16:34:38,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:38,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642338581] [2023-11-22 16:34:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:38,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 16:34:38,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:38,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642338581] [2023-11-22 16:34:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642338581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182139631] [2023-11-22 16:34:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:38,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:34:38,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 16:34:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:38,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 16:34:38,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 16:34:38,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:34:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 16:34:38,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182139631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:34:38,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:34:38,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-22 16:34:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355973019] [2023-11-22 16:34:38,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:34:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 16:34:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 16:34:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2023-11-22 16:34:38,783 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-11-22 16:34:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:38,958 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2023-11-22 16:34:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 16:34:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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 20 [2023-11-22 16:34:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:38,959 INFO L225 Difference]: With dead ends: 100 [2023-11-22 16:34:38,959 INFO L226 Difference]: Without dead ends: 100 [2023-11-22 16:34:38,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2023-11-22 16:34:38,960 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 157 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:38,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 86 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:34:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-22 16:34:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2023-11-22 16:34:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 70 states have internal predecessors, (77), 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) [2023-11-22 16:34:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2023-11-22 16:34:38,963 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 20 [2023-11-22 16:34:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:38,963 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2023-11-22 16:34:38,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-11-22 16:34:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2023-11-22 16:34:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 16:34:38,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:38,964 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 16:34:38,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 16:34:39,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 16:34:39,172 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:39,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1723616250, now seen corresponding path program 2 times [2023-11-22 16:34:39,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:39,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244153723] [2023-11-22 16:34:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:39,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 16:34:39,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:39,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244153723] [2023-11-22 16:34:39,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244153723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:39,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270858781] [2023-11-22 16:34:39,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 16:34:39,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:39,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:39,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:34:39,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 16:34:39,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 16:34:39,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 16:34:39,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 16:34:39,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 16:34:39,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:34:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 16:34:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270858781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:34:40,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:34:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2023-11-22 16:34:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414998597] [2023-11-22 16:34:40,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:34:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-22 16:34:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-22 16:34:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 16:34:40,192 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 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) [2023-11-22 16:34:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:40,680 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2023-11-22 16:34:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-22 16:34:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 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 36 [2023-11-22 16:34:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:40,681 INFO L225 Difference]: With dead ends: 188 [2023-11-22 16:34:40,682 INFO L226 Difference]: Without dead ends: 188 [2023-11-22 16:34:40,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2023-11-22 16:34:40,683 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 541 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:40,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 86 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 16:34:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-22 16:34:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 119. [2023-11-22 16:34:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.209090909090909) internal successors, (133), 118 states have internal predecessors, (133), 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) [2023-11-22 16:34:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2023-11-22 16:34:40,687 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 36 [2023-11-22 16:34:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:40,688 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2023-11-22 16:34:40,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 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) [2023-11-22 16:34:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2023-11-22 16:34:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-22 16:34:40,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:40,689 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 2, 1, 1, 1, 1, 1, 1] [2023-11-22 16:34:40,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 16:34:40,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:40,901 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:40,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:40,901 INFO L85 PathProgramCache]: Analyzing trace with hash -541764550, now seen corresponding path program 3 times [2023-11-22 16:34:40,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:40,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617341610] [2023-11-22 16:34:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:40,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 16:34:41,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:41,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617341610] [2023-11-22 16:34:41,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617341610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:41,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868087306] [2023-11-22 16:34:41,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 16:34:41,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:41,717 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) [2023-11-22 16:34:41,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 16:34:41,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 16:34:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 16:34:41,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-22 16:34:41,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:41,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 16:34:41,827 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 [2023-11-22 16:34:41,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-22 16:34:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2023-11-22 16:34:42,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:34:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2023-11-22 16:34:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868087306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:34:43,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:34:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 5, 5] total 43 [2023-11-22 16:34:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586376003] [2023-11-22 16:34:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:34:43,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-22 16:34:43,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:34:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-22 16:34:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=1289, Unknown=0, NotChecked=0, Total=1892 [2023-11-22 16:34:43,194 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 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) [2023-11-22 16:34:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:34:52,401 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2023-11-22 16:34:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-22 16:34:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 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 68 [2023-11-22 16:34:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:34:52,402 INFO L225 Difference]: With dead ends: 198 [2023-11-22 16:34:52,402 INFO L226 Difference]: Without dead ends: 198 [2023-11-22 16:34:52,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3570, Invalid=7772, Unknown=0, NotChecked=0, Total=11342 [2023-11-22 16:34:52,405 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 956 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 16:34:52,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 38 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 16:34:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-22 16:34:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 121. [2023-11-22 16:34:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 120 states have internal predecessors, (132), 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) [2023-11-22 16:34:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2023-11-22 16:34:52,408 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 68 [2023-11-22 16:34:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:34:52,408 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2023-11-22 16:34:52,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 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) [2023-11-22 16:34:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2023-11-22 16:34:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-22 16:34:52,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:34:52,410 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 5, 4, 1, 1, 1, 1, 1] [2023-11-22 16:34:52,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 16:34:52,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:52,620 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:34:52,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:34:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash 788604974, now seen corresponding path program 4 times [2023-11-22 16:34:52,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:34:52,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633740810] [2023-11-22 16:34:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:34:52,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:34:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:34:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-22 16:34:53,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:34:53,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633740810] [2023-11-22 16:34:53,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633740810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:34:53,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935397554] [2023-11-22 16:34:53,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 16:34:53,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:34:53,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:34:53,444 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) [2023-11-22 16:34:53,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 16:34:59,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 16:34:59,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 16:34:59,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-22 16:34:59,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:34:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-22 16:34:59,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:35:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-22 16:35:00,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935397554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:35:00,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:35:00,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 99 [2023-11-22 16:35:00,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35380300] [2023-11-22 16:35:00,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:35:00,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-22 16:35:00,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:35:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-22 16:35:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4359, Invalid=5541, Unknown=0, NotChecked=0, Total=9900 [2023-11-22 16:35:00,929 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 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) [2023-11-22 16:35:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:35:02,738 INFO L93 Difference]: Finished difference Result 372 states and 404 transitions. [2023-11-22 16:35:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-22 16:35:02,738 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 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 76 [2023-11-22 16:35:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:35:02,740 INFO L225 Difference]: With dead ends: 372 [2023-11-22 16:35:02,740 INFO L226 Difference]: Without dead ends: 372 [2023-11-22 16:35:02,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6205 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6567, Invalid=10725, Unknown=0, NotChecked=0, Total=17292 [2023-11-22 16:35:02,743 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1061 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 16:35:02,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 149 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 16:35:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-22 16:35:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 221. [2023-11-22 16:35:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 212 states have (on average 1.1745283018867925) internal successors, (249), 220 states have internal predecessors, (249), 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) [2023-11-22 16:35:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 249 transitions. [2023-11-22 16:35:02,752 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 249 transitions. Word has length 76 [2023-11-22 16:35:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:35:02,752 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 249 transitions. [2023-11-22 16:35:02,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 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) [2023-11-22 16:35:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 249 transitions. [2023-11-22 16:35:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-22 16:35:02,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:35:02,765 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 5, 4, 1, 1, 1, 1, 1] [2023-11-22 16:35:02,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-22 16:35:02,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 16:35:02,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-22 16:35:02,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:35:02,969 INFO L85 PathProgramCache]: Analyzing trace with hash 53781682, now seen corresponding path program 5 times [2023-11-22 16:35:02,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:35:02,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122338178] [2023-11-22 16:35:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:35:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:35:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:35:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4116 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-22 16:35:05,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:35:05,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122338178] [2023-11-22 16:35:05,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122338178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:35:05,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494086181] [2023-11-22 16:35:05,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 16:35:05,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:35:05,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:35:05,627 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) [2023-11-22 16:35:05,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process Killed by 15