/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_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:11:57,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:11:57,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:11:57,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:11:57,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:11:57,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:11:57,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:11:57,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:11:57,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:11:57,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:11:57,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:11:57,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:11:57,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:11:57,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:11:57,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:11:57,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:11:57,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:11:57,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:11:57,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:11:57,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:11:57,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:11:57,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:11:57,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:11:57,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:11:57,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:11:57,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:11:57,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:11:57,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:11:57,262 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 18:11:57,291 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:11:57,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:11:57,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:11:57,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:11:57,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:11:57,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:11:57,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:11:57,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:11:57,294 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:11:57,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:11:57,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:11:57,295 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:11:57,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:11:57,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:11:57,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:11:57,296 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:11:57,296 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:11:57,296 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:11:57,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:11:57,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:11:57,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:11:57,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:11:57,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:11:57,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:11:57,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:11:57,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:11:57,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:11:57,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:11:57,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:11:57,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:11:57,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:11:57,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:11:57,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:11:57,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:11:57,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:11:57,797 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:11:57,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2022-10-15 18:11:57,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9de00457/ee925996f8c94a04a09220f220ae8d7c/FLAG98944ac16 [2022-10-15 18:11:58,547 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:11:58,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2022-10-15 18:11:58,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9de00457/ee925996f8c94a04a09220f220ae8d7c/FLAG98944ac16 [2022-10-15 18:11:58,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9de00457/ee925996f8c94a04a09220f220ae8d7c [2022-10-15 18:11:58,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:11:58,912 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:11:58,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:11:58,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:11:58,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:11:58,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:11:58" (1/1) ... [2022-10-15 18:11:58,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3961f50b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:58, skipping insertion in model container [2022-10-15 18:11:58,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:11:58" (1/1) ... [2022-10-15 18:11:58,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:11:58,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:11:59,122 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_init4_ground-1.i[816,829] [2022-10-15 18:11:59,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:11:59,153 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:11:59,168 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_init4_ground-1.i[816,829] [2022-10-15 18:11:59,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:11:59,194 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:11:59,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59 WrapperNode [2022-10-15 18:11:59,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:11:59,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:11:59,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:11:59,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:11:59,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,240 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-10-15 18:11:59,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:11:59,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:11:59,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:11:59,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:11:59,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:11:59,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:11:59,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:11:59,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:11:59,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (1/1) ... [2022-10-15 18:11:59,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:11:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:11:59,314 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 18:11:59,332 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 18:11:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:11:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:11:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:11:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:11:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:11:59,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:11:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:11:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:11:59,523 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:11:59,525 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:11:59,884 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:11:59,901 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:11:59,901 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-15 18:11:59,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:11:59 BoogieIcfgContainer [2022-10-15 18:11:59,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:11:59,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:11:59,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:11:59,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:11:59,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:11:58" (1/3) ... [2022-10-15 18:11:59,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6556fcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:11:59, skipping insertion in model container [2022-10-15 18:11:59,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:11:59" (2/3) ... [2022-10-15 18:11:59,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6556fcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:11:59, skipping insertion in model container [2022-10-15 18:11:59,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:11:59" (3/3) ... [2022-10-15 18:11:59,931 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2022-10-15 18:11:59,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:11:59,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-10-15 18:12:00,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:12:00,107 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;@4ce77d12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:12:00,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-10-15 18:12:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:12:00,143 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:00,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:12:00,146 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 18:12:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-15 18:12:00,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:00,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864958110] [2022-10-15 18:12:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:00,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:00,495 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 18:12:00,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864958110] [2022-10-15 18:12:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864958110] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:00,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:12:00,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980038429] [2022-10-15 18:12:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:00,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:12:00,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:12:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:00,547 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 18:12:00,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:00,605 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-10-15 18:12:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:12:00,608 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 18:12:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:00,619 INFO L225 Difference]: With dead ends: 36 [2022-10-15 18:12:00,619 INFO L226 Difference]: Without dead ends: 34 [2022-10-15 18:12:00,622 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 18:12:00,627 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:00,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:12:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-10-15 18:12:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-10-15 18:12:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 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 18:12:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-10-15 18:12:00,670 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 4 [2022-10-15 18:12:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:00,670 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-10-15 18:12:00,671 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 18:12:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-10-15 18:12:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:12:00,672 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:00,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:12:00,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:12:00,673 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 18:12:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:00,674 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-15 18:12:00,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:00,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844005301] [2022-10-15 18:12:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:00,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:00,799 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 18:12:00,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844005301] [2022-10-15 18:12:00,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844005301] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:00,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:00,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:12:00,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795170012] [2022-10-15 18:12:00,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:12:00,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:12:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:00,805 INFO L87 Difference]: Start difference. First operand 34 states and 38 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 18:12:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:00,872 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-10-15 18:12:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:12:00,873 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 18:12:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:00,874 INFO L225 Difference]: With dead ends: 37 [2022-10-15 18:12:00,874 INFO L226 Difference]: Without dead ends: 37 [2022-10-15 18:12:00,875 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 18:12:00,876 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:00,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-15 18:12:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-10-15 18:12:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 35 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 18:12:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-10-15 18:12:00,885 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 4 [2022-10-15 18:12:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:00,886 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-10-15 18:12:00,886 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 18:12:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-10-15 18:12:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 18:12:00,887 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:00,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 18:12:00,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:12:00,888 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 18:12:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-15 18:12:00,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:00,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118456206] [2022-10-15 18:12:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:01,110 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 18:12:01,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:01,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118456206] [2022-10-15 18:12:01,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118456206] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:01,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934951541] [2022-10-15 18:12:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:01,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:01,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:01,114 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 18:12:01,122 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 18:12:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:12:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:01,259 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:12:01,352 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 18:12:01,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:01,486 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 18:12:01,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934951541] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:01,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:01,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:12:01,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412474127] [2022-10-15 18:12:01,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:01,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:12:01,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:01,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:12:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:12:01,493 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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 18:12:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:01,707 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-10-15 18:12:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:12:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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 18:12:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:01,715 INFO L225 Difference]: With dead ends: 47 [2022-10-15 18:12:01,716 INFO L226 Difference]: Without dead ends: 47 [2022-10-15 18:12:01,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:12:01,720 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:01,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 61 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:12:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-15 18:12:01,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-10-15 18:12:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-10-15 18:12:01,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 7 [2022-10-15 18:12:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:01,740 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-10-15 18:12:01,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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 18:12:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-10-15 18:12:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 18:12:01,745 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:01,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:01,800 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 18:12:01,946 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 18:12:01,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -65957008, now seen corresponding path program 1 times [2022-10-15 18:12:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:01,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640277572] [2022-10-15 18:12:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:01,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 18:12:02,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640277572] [2022-10-15 18:12:02,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640277572] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:02,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:02,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:12:02,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048149303] [2022-10-15 18:12:02,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:12:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:12:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:02,095 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:02,190 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-10-15 18:12:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:12:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 18:12:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:02,192 INFO L225 Difference]: With dead ends: 54 [2022-10-15 18:12:02,192 INFO L226 Difference]: Without dead ends: 54 [2022-10-15 18:12:02,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:02,194 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:02,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 29 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-10-15 18:12:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-10-15 18:12:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 50 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 18:12:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-10-15 18:12:02,210 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 12 [2022-10-15 18:12:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-10-15 18:12:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-10-15 18:12:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 18:12:02,215 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:02,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:02,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:12:02,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2125198987, now seen corresponding path program 1 times [2022-10-15 18:12:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761135736] [2022-10-15 18:12:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:02,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:02,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:02,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761135736] [2022-10-15 18:12:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761135736] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:02,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408947345] [2022-10-15 18:12:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:02,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:02,365 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 18:12:02,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:12:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:12:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:02,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:02,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408947345] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:02,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:02,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 18:12:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219535169] [2022-10-15 18:12:02,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:02,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:12:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:02,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:12:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:12:02,502 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 18:12:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:02,738 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2022-10-15 18:12:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:12:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 15 [2022-10-15 18:12:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:02,740 INFO L225 Difference]: With dead ends: 111 [2022-10-15 18:12:02,740 INFO L226 Difference]: Without dead ends: 111 [2022-10-15 18:12:02,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:12:02,743 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:02,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 78 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:12:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-10-15 18:12:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2022-10-15 18:12:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 97 states have internal predecessors, (115), 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 18:12:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2022-10-15 18:12:02,755 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 15 [2022-10-15 18:12:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:02,756 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2022-10-15 18:12:02,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 18:12:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2022-10-15 18:12:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 18:12:02,757 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:02,757 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-15 18:12:02,792 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 18:12:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:02,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash -278008218, now seen corresponding path program 2 times [2022-10-15 18:12:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:02,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523557624] [2022-10-15 18:12:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:02,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:03,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:03,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523557624] [2022-10-15 18:12:03,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523557624] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117350436] [2022-10-15 18:12:03,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:03,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:03,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:03,209 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 18:12:03,232 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 18:12:03,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:12:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:03,305 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:12:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:03,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:12:03,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117350436] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:03,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:12:03,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:12:03,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509987459] [2022-10-15 18:12:03,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:03,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:12:03,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:12:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:12:03,504 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 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 18:12:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:03,702 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-10-15 18:12:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:12:03,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 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 16 [2022-10-15 18:12:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:03,704 INFO L225 Difference]: With dead ends: 97 [2022-10-15 18:12:03,704 INFO L226 Difference]: Without dead ends: 97 [2022-10-15 18:12:03,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:12:03,706 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:03,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 28 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:12:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-15 18:12:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-10-15 18:12:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 96 states have internal predecessors, (107), 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 18:12:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2022-10-15 18:12:03,719 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 16 [2022-10-15 18:12:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:03,719 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2022-10-15 18:12:03,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 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 18:12:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2022-10-15 18:12:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 18:12:03,721 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:03,721 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:03,759 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 18:12:03,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:03,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2086175883, now seen corresponding path program 2 times [2022-10-15 18:12:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:03,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299754099] [2022-10-15 18:12:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:03,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:04,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299754099] [2022-10-15 18:12:04,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299754099] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:04,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905229409] [2022-10-15 18:12:04,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:04,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:04,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:04,080 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 18:12:04,102 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 18:12:04,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:04,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:12:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:04,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:04,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905229409] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:04,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:04,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:12:04,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445686947] [2022-10-15 18:12:04,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:04,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:12:04,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:12:04,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:12:04,321 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:04,666 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-10-15 18:12:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:12:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-15 18:12:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:04,669 INFO L225 Difference]: With dead ends: 199 [2022-10-15 18:12:04,669 INFO L226 Difference]: Without dead ends: 199 [2022-10-15 18:12:04,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:12:04,670 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:04,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 78 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:12:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-10-15 18:12:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2022-10-15 18:12:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.085561497326203) internal successors, (203), 192 states have internal predecessors, (203), 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 18:12:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2022-10-15 18:12:04,685 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 27 [2022-10-15 18:12:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:04,685 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2022-10-15 18:12:04,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2022-10-15 18:12:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 18:12:04,687 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:04,688 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:04,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:04,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1979539317, now seen corresponding path program 3 times [2022-10-15 18:12:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833735350] [2022-10-15 18:12:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:05,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833735350] [2022-10-15 18:12:05,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833735350] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529702188] [2022-10-15 18:12:05,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:12:05,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:05,323 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 18:12:05,342 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 18:12:05,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:12:05,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:12:05,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:05,406 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:12:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-15 18:12:05,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:12:05,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529702188] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:05,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:12:05,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2022-10-15 18:12:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545126663] [2022-10-15 18:12:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:05,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:12:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:12:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:12:05,679 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 18:12:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:05,736 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-10-15 18:12:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:12:05,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 51 [2022-10-15 18:12:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:05,739 INFO L225 Difference]: With dead ends: 190 [2022-10-15 18:12:05,739 INFO L226 Difference]: Without dead ends: 190 [2022-10-15 18:12:05,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:12:05,740 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:05,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:05,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-15 18:12:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-10-15 18:12:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 187 states have (on average 1.0374331550802138) internal successors, (194), 189 states have internal predecessors, (194), 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 18:12:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-10-15 18:12:05,763 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 51 [2022-10-15 18:12:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:05,763 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-10-15 18:12:05,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 18:12:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-10-15 18:12:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-10-15 18:12:05,771 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:05,771 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:05,809 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 18:12:05,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:05,987 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1627819282, now seen corresponding path program 1 times [2022-10-15 18:12:05,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:05,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862022226] [2022-10-15 18:12:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:05,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2022-10-15 18:12:06,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:06,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862022226] [2022-10-15 18:12:06,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862022226] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:06,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:06,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:12:06,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155065164] [2022-10-15 18:12:06,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:06,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:12:06,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:06,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:12:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:06,773 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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 18:12:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:06,801 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2022-10-15 18:12:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:12:06,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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) Word has length 180 [2022-10-15 18:12:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:06,808 INFO L225 Difference]: With dead ends: 198 [2022-10-15 18:12:06,808 INFO L226 Difference]: Without dead ends: 198 [2022-10-15 18:12:06,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:06,812 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:06,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 47 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:12:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-10-15 18:12:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2022-10-15 18:12:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 189 states have (on average 1.037037037037037) internal successors, (196), 191 states have internal predecessors, (196), 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 18:12:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-10-15 18:12:06,827 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 180 [2022-10-15 18:12:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:06,829 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-10-15 18:12:06,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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 18:12:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-10-15 18:12:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-10-15 18:12:06,843 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:06,844 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 18:12:06,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 111531016, now seen corresponding path program 1 times [2022-10-15 18:12:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:06,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191841690] [2022-10-15 18:12:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-10-15 18:12:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191841690] [2022-10-15 18:12:07,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191841690] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529687681] [2022-10-15 18:12:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:07,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:07,844 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 18:12:07,852 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 18:12:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:12:08,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-10-15 18:12:08,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-10-15 18:12:08,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529687681] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:08,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:08,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:12:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367054101] [2022-10-15 18:12:08,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:08,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:12:08,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:12:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:12:08,573 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 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 18:12:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:09,288 INFO L93 Difference]: Finished difference Result 384 states and 388 transitions. [2022-10-15 18:12:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:12:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 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 183 [2022-10-15 18:12:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:09,291 INFO L225 Difference]: With dead ends: 384 [2022-10-15 18:12:09,291 INFO L226 Difference]: Without dead ends: 384 [2022-10-15 18:12:09,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:12:09,294 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 558 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:09,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 64 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:12:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-10-15 18:12:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-10-15 18:12:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 381 states have (on average 1.0183727034120735) internal successors, (388), 383 states have internal predecessors, (388), 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 18:12:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 388 transitions. [2022-10-15 18:12:09,304 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 388 transitions. Word has length 183 [2022-10-15 18:12:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:09,304 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 388 transitions. [2022-10-15 18:12:09,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 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 18:12:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 388 transitions. [2022-10-15 18:12:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-10-15 18:12:09,312 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:09,312 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:09,353 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 18:12:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:09,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash 12724744, now seen corresponding path program 2 times [2022-10-15 18:12:09,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:09,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977778116] [2022-10-15 18:12:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:09,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5340 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2022-10-15 18:12:12,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:12,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977778116] [2022-10-15 18:12:12,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977778116] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:12,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308454583] [2022-10-15 18:12:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:12,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:12,470 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 18:12:12,488 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 18:12:12,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:12:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5340 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2022-10-15 18:12:12,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5340 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2022-10-15 18:12:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308454583] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:14,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:14,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:12:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808574741] [2022-10-15 18:12:14,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:14,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:12:14,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:14,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:12:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:12:14,383 INFO L87 Difference]: Start difference. First operand 384 states and 388 transitions. Second operand has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 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 18:12:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:16,495 INFO L93 Difference]: Finished difference Result 768 states and 772 transitions. [2022-10-15 18:12:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:12:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 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 375 [2022-10-15 18:12:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:16,514 INFO L225 Difference]: With dead ends: 768 [2022-10-15 18:12:16,514 INFO L226 Difference]: Without dead ends: 768 [2022-10-15 18:12:16,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:12:16,520 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1458 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:16,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1458 Valid, 78 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-15 18:12:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-10-15 18:12:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 768. [2022-10-15 18:12:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 765 states have (on average 1.0091503267973856) internal successors, (772), 767 states have internal predecessors, (772), 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 18:12:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 772 transitions. [2022-10-15 18:12:16,539 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 772 transitions. Word has length 375 [2022-10-15 18:12:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:16,539 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 772 transitions. [2022-10-15 18:12:16,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 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 18:12:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 772 transitions. [2022-10-15 18:12:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2022-10-15 18:12:16,562 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:16,562 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:16,607 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 18:12:16,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:16,777 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:12:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1365169672, now seen corresponding path program 3 times [2022-10-15 18:12:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:16,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459648046] [2022-10-15 18:12:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22940 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 17205 trivial. 0 not checked. [2022-10-15 18:12:26,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459648046] [2022-10-15 18:12:26,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459648046] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276796313] [2022-10-15 18:12:26,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:12:26,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:26,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:26,259 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 18:12:26,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process