/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/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:01:24,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:01:24,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:01:24,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 17:01:24,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:01:24,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:01:24,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:01:24,857 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 17:01:24,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:01:24,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:01:24,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:01:24,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:01:24,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:01:24,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:01:24,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:01:24,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:01:24,926 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:01:24,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:01:24,928 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:01:24,928 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:01:24,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:01:24,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:01:24,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:01:24,929 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:01:24,929 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:01:24,929 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:01:24,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:01:24,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:01:24,930 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:01:24,930 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:01:24,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:01:24,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:01:24,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:01:24,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:01:24,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:01:24,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:01:24,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:01:24,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:01:24,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:01:25,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:01:25,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:01:25,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:01:25,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:01:25,411 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:01:25,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/mcmillan2006.i [2022-10-15 17:01:25,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4caebb70/c2591dc2bf5948d2bbf94f88e8436558/FLAGaeed15946 [2022-10-15 17:01:26,161 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:01:26,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/mcmillan2006.i [2022-10-15 17:01:26,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4caebb70/c2591dc2bf5948d2bbf94f88e8436558/FLAGaeed15946 [2022-10-15 17:01:26,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4caebb70/c2591dc2bf5948d2bbf94f88e8436558 [2022-10-15 17:01:26,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:01:26,513 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:01:26,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:01:26,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:01:26,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:01:26,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a484966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26, skipping insertion in model container [2022-10-15 17:01:26,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:01:26,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:01:26,738 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/loop-lit/mcmillan2006.i[1009,1022] [2022-10-15 17:01:26,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:01:26,768 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:01:26,786 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/loop-lit/mcmillan2006.i[1009,1022] [2022-10-15 17:01:26,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:01:26,810 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:01:26,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26 WrapperNode [2022-10-15 17:01:26,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:01:26,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:01:26,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:01:26,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:01:26,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,856 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-10-15 17:01:26,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:01:26,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:01:26,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:01:26,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:01:26,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,883 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:01:26,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:01:26,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:01:26,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:01:26,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (1/1) ... [2022-10-15 17:01:26,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:01:26,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:01:26,940 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 17:01:26,965 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 17:01:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:01:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:01:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:01:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-15 17:01:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:01:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:01:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:01:27,136 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:01:27,139 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:01:27,331 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:01:27,340 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:01:27,340 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-15 17:01:27,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:01:27 BoogieIcfgContainer [2022-10-15 17:01:27,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:01:27,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:01:27,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:01:27,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:01:27,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:01:26" (1/3) ... [2022-10-15 17:01:27,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e42532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:01:27, skipping insertion in model container [2022-10-15 17:01:27,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:01:26" (2/3) ... [2022-10-15 17:01:27,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e42532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:01:27, skipping insertion in model container [2022-10-15 17:01:27,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:01:27" (3/3) ... [2022-10-15 17:01:27,376 INFO L112 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2022-10-15 17:01:27,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:01:27,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-10-15 17:01:27,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:01:27,620 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;@285817ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:01:27,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-15 17:01:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 23 states have internal predecessors, (29), 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 17:01:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:01:27,656 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:01:27,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:01:27,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 17:01:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:01:27,702 INFO L85 PathProgramCache]: Analyzing trace with hash 925653, now seen corresponding path program 1 times [2022-10-15 17:01:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:01:27,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585777410] [2022-10-15 17:01:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:01:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:01:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:01:28,066 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 17:01:28,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:01:28,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585777410] [2022-10-15 17:01:28,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585777410] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:01:28,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:01:28,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:01:28,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691697306] [2022-10-15 17:01:28,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:01:28,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:01:28,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:01:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:01:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:01:28,120 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 23 states have internal predecessors, (29), 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 17:01:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:01:28,161 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-10-15 17:01:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:01:28,164 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 17:01:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:01:28,179 INFO L225 Difference]: With dead ends: 25 [2022-10-15 17:01:28,179 INFO L226 Difference]: Without dead ends: 22 [2022-10-15 17:01:28,187 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 17:01:28,196 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:01:28,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:01:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-15 17:01:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-15 17:01:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:01:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-10-15 17:01:28,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2022-10-15 17:01:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:01:28,252 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-10-15 17:01:28,253 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 17:01:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-10-15 17:01:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:01:28,254 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:01:28,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:01:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:01:28,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 17:01:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:01:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 28695942, now seen corresponding path program 1 times [2022-10-15 17:01:28,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:01:28,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347869173] [2022-10-15 17:01:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:01:28,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:01:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:01:28,384 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 17:01:28,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:01:28,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347869173] [2022-10-15 17:01:28,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347869173] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:01:28,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:01:28,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:01:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17972478] [2022-10-15 17:01:28,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:01:28,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:01:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:01:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:01:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:01:28,390 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:01:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:01:28,409 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-10-15 17:01:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:01:28,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 17:01:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:01:28,413 INFO L225 Difference]: With dead ends: 20 [2022-10-15 17:01:28,413 INFO L226 Difference]: Without dead ends: 20 [2022-10-15 17:01:28,413 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 17:01:28,416 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:01:28,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:01:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-15 17:01:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-10-15 17:01:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 19 states have internal predecessors, (21), 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 17:01:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-10-15 17:01:28,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2022-10-15 17:01:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:01:28,429 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-10-15 17:01:28,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:01:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-10-15 17:01:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:01:28,430 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:01:28,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:01:28,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:01:28,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 17:01:28,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:01:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash 28695943, now seen corresponding path program 1 times [2022-10-15 17:01:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:01:28,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732202022] [2022-10-15 17:01:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:01:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:01:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:01:28,668 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 17:01:28,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:01:28,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732202022] [2022-10-15 17:01:28,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732202022] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:01:28,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:01:28,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:01:28,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186177829] [2022-10-15 17:01:28,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:01:28,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:01:28,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:01:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:01:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:01:28,674 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 17:01:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:01:28,775 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-10-15 17:01:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:01:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 17:01:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:01:28,777 INFO L225 Difference]: With dead ends: 42 [2022-10-15 17:01:28,778 INFO L226 Difference]: Without dead ends: 42 [2022-10-15 17:01:28,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:01:28,781 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:01:28,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 33 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:01:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-15 17:01:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 22. [2022-10-15 17:01:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 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 17:01:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-10-15 17:01:28,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 5 [2022-10-15 17:01:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:01:28,790 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-10-15 17:01:28,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 17:01:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-10-15 17:01:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:01:28,792 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:01:28,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:01:28,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:01:28,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 17:01:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:01:28,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1806944658, now seen corresponding path program 1 times [2022-10-15 17:01:28,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:01:28,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158606324] [2022-10-15 17:01:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:01:28,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:01:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:01:28,990 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 17:01:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:01:28,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158606324] [2022-10-15 17:01:28,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158606324] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:01:28,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:01:28,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:01:28,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718331524] [2022-10-15 17:01:28,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:01:28,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:01:28,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:01:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:01:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:01:28,995 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 17:01:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:01:29,092 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-10-15 17:01:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:01:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 17:01:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:01:29,094 INFO L225 Difference]: With dead ends: 28 [2022-10-15 17:01:29,094 INFO L226 Difference]: Without dead ends: 28 [2022-10-15 17:01:29,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:01:29,101 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:01:29,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:01:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-15 17:01:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-10-15 17:01:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 23 states have internal predecessors, (26), 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 17:01:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-10-15 17:01:29,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 7 [2022-10-15 17:01:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:01:29,117 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-10-15 17:01:29,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 17:01:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-10-15 17:01:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 17:01:29,119 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:01:29,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:01:29,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:01:29,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-10-15 17:01:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:01:29,121 INFO L85 PathProgramCache]: Analyzing trace with hash 180708241, now seen corresponding path program 1 times [2022-10-15 17:01:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:01:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292238487] [2022-10-15 17:01:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:01:29,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:01:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-15 17:01:29,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-15 17:01:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-15 17:01:29,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-15 17:01:29,200 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-15 17:01:29,202 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2022-10-15 17:01:29,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2022-10-15 17:01:29,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-10-15 17:01:29,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-10-15 17:01:29,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2022-10-15 17:01:29,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-10-15 17:01:29,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:01:29,213 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-10-15 17:01:29,219 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-15 17:01:29,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 05:01:29 BoogieIcfgContainer [2022-10-15 17:01:29,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-15 17:01:29,249 INFO L158 Benchmark]: Toolchain (without parser) took 2740.24ms. Allocated memory is still 162.5MB. Free memory was 137.2MB in the beginning and 93.4MB in the end (delta: 43.9MB). Peak memory consumption was 43.6MB. Max. memory is 8.0GB. [2022-10-15 17:01:29,250 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 162.5MB. Free memory is still 133.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-10-15 17:01:29,250 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.50ms. Allocated memory is still 162.5MB. Free memory was 137.0MB in the beginning and 127.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-10-15 17:01:29,251 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.21ms. Allocated memory is still 162.5MB. Free memory was 127.1MB in the beginning and 125.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-15 17:01:29,252 INFO L158 Benchmark]: Boogie Preprocessor took 28.51ms. Allocated memory is still 162.5MB. Free memory was 125.7MB in the beginning and 124.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-15 17:01:29,253 INFO L158 Benchmark]: RCFGBuilder took 459.05ms. Allocated memory is still 162.5MB. Free memory was 124.4MB in the beginning and 113.5MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-10-15 17:01:29,253 INFO L158 Benchmark]: TraceAbstraction took 1890.71ms. Allocated memory is still 162.5MB. Free memory was 112.9MB in the beginning and 93.4MB in the end (delta: 19.6MB). Peak memory consumption was 19.5MB. Max. memory is 8.0GB. [2022-10-15 17:01:29,256 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 162.5MB. Free memory is still 133.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 291.50ms. Allocated memory is still 162.5MB. Free memory was 137.0MB in the beginning and 127.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 44.21ms. Allocated memory is still 162.5MB. Free memory was 127.1MB in the beginning and 125.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.51ms. Allocated memory is still 162.5MB. Free memory was 125.7MB in the beginning and 124.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 459.05ms. Allocated memory is still 162.5MB. Free memory was 124.4MB in the beginning and 113.5MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1890.71ms. Allocated memory is still 162.5MB. Free memory was 112.9MB in the beginning and 93.4MB in the end (delta: 19.6MB). Peak memory consumption was 19.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 26]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 26. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(!(0 <= n && n <= 1000)) [L29] int *x = malloc(n * sizeof(int)); [L30] int i = 0; VAL [i=0, n=0, x={-1:0}] [L30] COND FALSE !(i < n) VAL [i=0, n=0, x={-1:0}] [L31] int i = 0; VAL [i=0, i=0, n=0, x={-1:0}] [L31] COND FALSE !(i < n) VAL [i=0, i=0, n=0, x={-1:0}] [L32] return 0; VAL [\result=0, i=0, i=0, n=0, x={-1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 58 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 58 mSDsluCounter, 140 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 69 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 82 IncrementalHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 71 mSDtfsCounter, 82 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 67 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-10-15 17:01:29,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...