/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:14:36,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:14:36,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:14:36,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 18:14:36,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:14:36,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:14:36,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:14:36,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:14:36,355 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:14:36,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:14:36,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:14:36,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:14:36,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:14:36,358 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:14:36,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:14:36,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:14:36,361 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:14:36,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:14:36,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:14:36,363 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:14:36,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:14:36,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:14:36,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:14:36,364 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:14:36,364 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:14:36,364 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:14:36,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:14:36,364 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:14:36,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:14:36,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:14:36,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:14:36,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:14:36,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:14:36,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:14:36,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:14:36,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:14:36,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:14:36,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:14:36,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:14:36,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:14:36,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:14:36,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:14:36,827 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:14:36,828 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:14:36,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_07.i [2022-10-15 18:14:36,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d7a6d259/52bc40f171fa47b5ba99823c2219025c/FLAG83819c667 [2022-10-15 18:14:37,550 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:14:37,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_07.i [2022-10-15 18:14:37,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d7a6d259/52bc40f171fa47b5ba99823c2219025c/FLAG83819c667 [2022-10-15 18:14:37,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d7a6d259/52bc40f171fa47b5ba99823c2219025c [2022-10-15 18:14:37,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:14:37,929 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:14:37,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:14:37,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:14:37,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:14:37,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:14:37" (1/1) ... [2022-10-15 18:14:37,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e8242c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:37, skipping insertion in model container [2022-10-15 18:14:37,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:14:37" (1/1) ... [2022-10-15 18:14:37,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:14:37,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:14:38,145 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2022-10-15 18:14:38,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:14:38,180 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:14:38,197 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2022-10-15 18:14:38,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:14:38,226 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:14:38,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38 WrapperNode [2022-10-15 18:14:38,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:14:38,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:14:38,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:14:38,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:14:38,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,276 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-10-15 18:14:38,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:14:38,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:14:38,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:14:38,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:14:38,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,309 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:14:38,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:14:38,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:14:38,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:14:38,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:14:38,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:38,381 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) [2022-10-15 18:14:38,412 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 [2022-10-15 18:14:38,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:14:38,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:14:38,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:14:38,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:14:38,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:14:38,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:14:38,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:14:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:14:38,575 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:14:38,579 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:14:38,892 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:14:38,909 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:14:38,910 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 18:14:38,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:14:38 BoogieIcfgContainer [2022-10-15 18:14:38,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:14:38,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:14:38,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:14:38,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:14:38,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:14:37" (1/3) ... [2022-10-15 18:14:38,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8e7aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:14:38, skipping insertion in model container [2022-10-15 18:14:38,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (2/3) ... [2022-10-15 18:14:38,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8e7aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:14:38, skipping insertion in model container [2022-10-15 18:14:38,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:14:38" (3/3) ... [2022-10-15 18:14:38,930 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2022-10-15 18:14:38,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:14:38,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-10-15 18:14:39,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:14:39,065 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=FINITE_AUTOMATA, 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;@12217cbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:14:39,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-10-15 18:14:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 states have internal predecessors, (40), 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) [2022-10-15 18:14:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:14:39,120 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:39,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:14:39,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-15 18:14:39,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467814169] [2022-10-15 18:14:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:39,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:39,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467814169] [2022-10-15 18:14:39,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467814169] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:39,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:14:39,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:14:39,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427683321] [2022-10-15 18:14:39,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:39,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:39,554 INFO L87 Difference]: Start difference. First operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 states have internal predecessors, (40), 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 2.0) 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) [2022-10-15 18:14:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:39,650 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-10-15 18:14:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:39,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2022-10-15 18:14:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:39,669 INFO L225 Difference]: With dead ends: 31 [2022-10-15 18:14:39,669 INFO L226 Difference]: Without dead ends: 29 [2022-10-15 18:14:39,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:39,676 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:39,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-15 18:14:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-15 18:14:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 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) [2022-10-15 18:14:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-10-15 18:14:39,715 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 4 [2022-10-15 18:14:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:39,716 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-10-15 18:14:39,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2022-10-15 18:14:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-10-15 18:14:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:14:39,717 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:39,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:14:39,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:14:39,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:39,718 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-15 18:14:39,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:39,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988102917] [2022-10-15 18:14:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:39,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:39,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:39,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988102917] [2022-10-15 18:14:39,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988102917] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:39,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:14:39,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:14:39,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745814650] [2022-10-15 18:14:39,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:39,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:39,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:39,924 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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) [2022-10-15 18:14:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:40,009 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-10-15 18:14:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2022-10-15 18:14:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:40,014 INFO L225 Difference]: With dead ends: 32 [2022-10-15 18:14:40,014 INFO L226 Difference]: Without dead ends: 32 [2022-10-15 18:14:40,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:40,020 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:40,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-15 18:14:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-10-15 18:14:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 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) [2022-10-15 18:14:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-10-15 18:14:40,033 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 4 [2022-10-15 18:14:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:40,033 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-10-15 18:14:40,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2022-10-15 18:14:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-10-15 18:14:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 18:14:40,036 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:40,036 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 18:14:40,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:14:40,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-15 18:14:40,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:40,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509817662] [2022-10-15 18:14:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:40,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:40,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:40,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509817662] [2022-10-15 18:14:40,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509817662] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:40,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015036830] [2022-10-15 18:14:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:40,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:40,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:40,289 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) [2022-10-15 18:14:40,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:14:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:14:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:40,472 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:14:40,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 [2022-10-15 18:14:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:40,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:40,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015036830] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:40,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:40,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 18:14:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389311352] [2022-10-15 18:14:40,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:14:40,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:14:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:14:40,631 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:40,864 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2022-10-15 18:14:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:14:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 18:14:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:40,867 INFO L225 Difference]: With dead ends: 71 [2022-10-15 18:14:40,867 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 18:14:40,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:14:40,869 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:40,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 34 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 18:14:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2022-10-15 18:14:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-10-15 18:14:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-10-15 18:14:40,880 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 7 [2022-10-15 18:14:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:40,880 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-10-15 18:14:40,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-10-15 18:14:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 18:14:40,882 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:40,882 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:40,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:41,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:41,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1447545997, now seen corresponding path program 1 times [2022-10-15 18:14:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:41,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562520606] [2022-10-15 18:14:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:41,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:41,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:41,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562520606] [2022-10-15 18:14:41,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562520606] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:41,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121734038] [2022-10-15 18:14:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:41,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:41,327 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) [2022-10-15 18:14:41,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:14:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:14:41,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:41,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:41,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121734038] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:41,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:41,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-15 18:14:41,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802623684] [2022-10-15 18:14:41,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:41,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 18:14:41,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:41,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 18:14:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:14:41,513 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:41,624 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-10-15 18:14:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:14:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-15 18:14:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:41,627 INFO L225 Difference]: With dead ends: 89 [2022-10-15 18:14:41,627 INFO L226 Difference]: Without dead ends: 89 [2022-10-15 18:14:41,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:14:41,630 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:41,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 129 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-15 18:14:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-10-15 18:14:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.25) internal successors, (75), 66 states have internal predecessors, (75), 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) [2022-10-15 18:14:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-10-15 18:14:41,641 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 19 [2022-10-15 18:14:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:41,642 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-10-15 18:14:41,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-10-15 18:14:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 18:14:41,644 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:41,644 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:41,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:41,853 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,SelfDestructingSolverStorable3 [2022-10-15 18:14:41,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash -657080717, now seen corresponding path program 2 times [2022-10-15 18:14:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546513511] [2022-10-15 18:14:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:41,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:42,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:42,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546513511] [2022-10-15 18:14:42,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546513511] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:42,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193146787] [2022-10-15 18:14:42,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:42,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:42,270 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) [2022-10-15 18:14:42,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:14:42,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:14:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:14:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:42,379 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-15 18:14:42,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 18:14:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-10-15 18:14:42,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:14:42,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193146787] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:42,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:14:42,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2022-10-15 18:14:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493231266] [2022-10-15 18:14:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:14:42,488 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-10-15 18:14:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:42,510 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-10-15 18:14:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-15 18:14:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:42,512 INFO L225 Difference]: With dead ends: 65 [2022-10-15 18:14:42,513 INFO L226 Difference]: Without dead ends: 65 [2022-10-15 18:14:42,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:14:42,514 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:42,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:14:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-15 18:14:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-10-15 18:14:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 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) [2022-10-15 18:14:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-10-15 18:14:42,523 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 37 [2022-10-15 18:14:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:42,523 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-10-15 18:14:42,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-10-15 18:14:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-10-15 18:14:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 18:14:42,525 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:42,525 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:42,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:42,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:42,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash -657080716, now seen corresponding path program 1 times [2022-10-15 18:14:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:42,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83564257] [2022-10-15 18:14:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:42,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:43,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83564257] [2022-10-15 18:14:43,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83564257] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354861011] [2022-10-15 18:14:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:43,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:43,007 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) [2022-10-15 18:14:43,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:14:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 18:14:43,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:43,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:43,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354861011] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:43,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:43,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-15 18:14:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054605333] [2022-10-15 18:14:43,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 18:14:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 18:14:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:14:43,480 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-10-15 18:14:43,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:43,727 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-10-15 18:14:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 18:14:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-15 18:14:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:43,730 INFO L225 Difference]: With dead ends: 149 [2022-10-15 18:14:43,730 INFO L226 Difference]: Without dead ends: 149 [2022-10-15 18:14:43,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:14:43,732 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 237 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:43,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 128 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:14:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-10-15 18:14:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2022-10-15 18:14:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 120 states have internal predecessors, (135), 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) [2022-10-15 18:14:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-10-15 18:14:43,744 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 37 [2022-10-15 18:14:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:43,745 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-10-15 18:14:43,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-10-15 18:14:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-10-15 18:14:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-15 18:14:43,748 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:43,748 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:43,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-10-15 18:14:43,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:43,962 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1573219212, now seen corresponding path program 2 times [2022-10-15 18:14:43,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:43,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794175095] [2022-10-15 18:14:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:43,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:44,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794175095] [2022-10-15 18:14:44,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794175095] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:44,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191242616] [2022-10-15 18:14:44,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:44,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:44,811 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) [2022-10-15 18:14:44,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:14:44,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:14:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:14:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:14:44,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-10-15 18:14:44,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 18:14:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-10-15 18:14:45,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:14:45,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191242616] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:45,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:14:45,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [25] total 26 [2022-10-15 18:14:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198589283] [2022-10-15 18:14:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:45,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:45,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:14:45,523 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-10-15 18:14:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:45,545 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-10-15 18:14:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 73 [2022-10-15 18:14:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:45,548 INFO L225 Difference]: With dead ends: 121 [2022-10-15 18:14:45,549 INFO L226 Difference]: Without dead ends: 121 [2022-10-15 18:14:45,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:14:45,550 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:45,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:14:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-15 18:14:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-10-15 18:14:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1551724137931034) internal successors, (134), 120 states have internal predecessors, (134), 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) [2022-10-15 18:14:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-10-15 18:14:45,562 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 73 [2022-10-15 18:14:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:45,563 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-10-15 18:14:45,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-10-15 18:14:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-10-15 18:14:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-15 18:14:45,566 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:45,566 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:45,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:45,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:45,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 556228912, now seen corresponding path program 1 times [2022-10-15 18:14:45,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:45,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901373352] [2022-10-15 18:14:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:45,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:46,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:46,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901373352] [2022-10-15 18:14:46,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901373352] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:46,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620923796] [2022-10-15 18:14:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:46,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:46,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:46,866 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) [2022-10-15 18:14:46,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:14:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:46,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 18:14:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:47,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:47,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620923796] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:47,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:47,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-10-15 18:14:47,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92348216] [2022-10-15 18:14:47,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:47,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-15 18:14:47,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-15 18:14:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:14:47,919 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 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) [2022-10-15 18:14:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:48,356 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2022-10-15 18:14:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-15 18:14:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 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 77 [2022-10-15 18:14:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:48,359 INFO L225 Difference]: With dead ends: 280 [2022-10-15 18:14:48,359 INFO L226 Difference]: Without dead ends: 280 [2022-10-15 18:14:48,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:14:48,362 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 496 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:48,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 267 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:14:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-15 18:14:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 233. [2022-10-15 18:14:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.1491228070175439) internal successors, (262), 232 states have internal predecessors, (262), 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) [2022-10-15 18:14:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 262 transitions. [2022-10-15 18:14:48,397 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 262 transitions. Word has length 77 [2022-10-15 18:14:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:48,401 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 262 transitions. [2022-10-15 18:14:48,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 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) [2022-10-15 18:14:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 262 transitions. [2022-10-15 18:14:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-10-15 18:14:48,407 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:48,407 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:48,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:48,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:48,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash -341701328, now seen corresponding path program 2 times [2022-10-15 18:14:48,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:48,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713459758] [2022-10-15 18:14:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:51,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:51,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713459758] [2022-10-15 18:14:51,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713459758] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:51,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482194630] [2022-10-15 18:14:51,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:51,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:51,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:51,472 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) [2022-10-15 18:14:51,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:14:51,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:14:51,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:51,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-15 18:14:51,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:51,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:55,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482194630] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:55,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:55,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-10-15 18:14:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564149807] [2022-10-15 18:14:55,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-10-15 18:14:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-10-15 18:14:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 18:14:55,018 INFO L87 Difference]: Start difference. First operand 233 states and 262 transitions. Second operand has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 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) [2022-10-15 18:14:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:56,196 INFO L93 Difference]: Finished difference Result 514 states and 516 transitions. [2022-10-15 18:14:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-10-15 18:14:56,198 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 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 149 [2022-10-15 18:14:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:56,201 INFO L225 Difference]: With dead ends: 514 [2022-10-15 18:14:56,202 INFO L226 Difference]: Without dead ends: 514 [2022-10-15 18:14:56,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 18:14:56,207 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1121 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:56,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 394 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:14:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-10-15 18:14:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 437. [2022-10-15 18:14:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 432 states have (on average 1.1342592592592593) internal successors, (490), 436 states have internal predecessors, (490), 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) [2022-10-15 18:14:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 490 transitions. [2022-10-15 18:14:56,222 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 490 transitions. Word has length 149 [2022-10-15 18:14:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:56,223 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 490 transitions. [2022-10-15 18:14:56,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 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) [2022-10-15 18:14:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 490 transitions. [2022-10-15 18:14:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-10-15 18:14:56,229 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:56,230 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:56,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:56,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:56,444 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1405917904, now seen corresponding path program 3 times [2022-10-15 18:14:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228743205] [2022-10-15 18:14:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:56,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:15:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:15:06,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:15:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228743205] [2022-10-15 18:15:06,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228743205] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:15:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641151274] [2022-10-15 18:15:06,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:15:06,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:15:06,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:15:06,007 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) [2022-10-15 18:15:06,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:15:06,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:15:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:15:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 18:15:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:15:06,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:15:06,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-10-15 18:15:06,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 18:15:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-10-15 18:15:08,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:15:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-10-15 18:15:10,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641151274] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:15:10,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:15:10,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 3, 3] total 101 [2022-10-15 18:15:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051982805] [2022-10-15 18:15:10,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:15:10,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-10-15 18:15:10,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:15:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-10-15 18:15:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5432, Unknown=0, NotChecked=0, Total=10100 [2022-10-15 18:15:10,020 INFO L87 Difference]: Start difference. First operand 437 states and 490 transitions. Second operand has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 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) [2022-10-15 18:15:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:15:18,738 INFO L93 Difference]: Finished difference Result 516 states and 518 transitions. [2022-10-15 18:15:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-10-15 18:15:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 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 293 [2022-10-15 18:15:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:15:18,747 INFO L225 Difference]: With dead ends: 516 [2022-10-15 18:15:18,748 INFO L226 Difference]: Without dead ends: 516 [2022-10-15 18:15:18,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=15863, Invalid=28869, Unknown=0, NotChecked=0, Total=44732 [2022-10-15 18:15:18,758 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1045 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 18:15:18,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 298 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 18:15:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-10-15 18:15:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 440. [2022-10-15 18:15:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.1264367816091954) internal successors, (490), 439 states have internal predecessors, (490), 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) [2022-10-15 18:15:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 490 transitions. [2022-10-15 18:15:18,771 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 490 transitions. Word has length 293 [2022-10-15 18:15:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:15:18,772 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 490 transitions. [2022-10-15 18:15:18,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 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) [2022-10-15 18:15:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 490 transitions. [2022-10-15 18:15:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-10-15 18:15:18,777 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:15:18,777 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-10-15 18:15:18,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:15:18,991 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,SelfDestructingSolverStorable9 [2022-10-15 18:15:18,992 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:15:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:15:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash 711930364, now seen corresponding path program 4 times [2022-10-15 18:15:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:15:18,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959920031] [2022-10-15 18:15:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:15:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:15:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:15:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13526 backedges. 0 proven. 13490 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-15 18:15:27,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:15:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959920031] [2022-10-15 18:15:27,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959920031] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:15:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433833926] [2022-10-15 18:15:27,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 18:15:27,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:15:27,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:15:27,836 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) [2022-10-15 18:15:27,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process