/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_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:22:05,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:22:05,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:22:05,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:22:05,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:22:05,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:22:05,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:22:05,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:22:05,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:22:05,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:22:05,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:22:05,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:22:05,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:22:05,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:22:05,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:22:05,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:22:05,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:22:05,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:22:05,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:22:05,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:22:05,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:22:05,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:22:05,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:22:05,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:22:05,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-16 05:22:05,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-16 05:22:05,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-16 05:22:05,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-16 05:22:05,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-16 05:22:05,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-16 05:22:05,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 05:22:05,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 05:22:05,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 05:22:05,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 05:22:05,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 05:22:05,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 05:22:05,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 05:22:05,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 05:22:05,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:22:05,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:22:05,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:22:05,365 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 [2022-10-16 05:22:05,419 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:22:05,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:22:05,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:22:05,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:22:05,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:22:05,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:22:05,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:22:05,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:22:05,426 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:22:05,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:22:05,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:22:05,427 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:22:05,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:22:05,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:22:05,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:22:05,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:22:05,428 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:22:05,428 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:22:05,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:22:05,429 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:22:05,429 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:22:05,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:22:05,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:22:05,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:22:05,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:22:05,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:22:05,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:22:05,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:22:05,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:22:05,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:22:05,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:22:05,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:22:05,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:22:05,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:22:05,889 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:22:05,890 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:22:05,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2022-10-16 05:22:05,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d643ea2a/f078a6d7f5ee42f980f97f539c30c125/FLAG46a919b4c [2022-10-16 05:22:06,553 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:22:06,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2022-10-16 05:22:06,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d643ea2a/f078a6d7f5ee42f980f97f539c30c125/FLAG46a919b4c [2022-10-16 05:22:06,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d643ea2a/f078a6d7f5ee42f980f97f539c30c125 [2022-10-16 05:22:06,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:22:06,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:22:06,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:22:06,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:22:06,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:22:06,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:22:06" (1/1) ... [2022-10-16 05:22:06,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24651de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:06, skipping insertion in model container [2022-10-16 05:22:06,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:22:06" (1/1) ... [2022-10-16 05:22:06,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:22:06,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:22:07,081 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_copyInitSum2_ground-1.i[823,836] [2022-10-16 05:22:07,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:22:07,117 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:22:07,139 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_copyInitSum2_ground-1.i[823,836] [2022-10-16 05:22:07,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:22:07,188 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:22:07,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07 WrapperNode [2022-10-16 05:22:07,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:22:07,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:22:07,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:22:07,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:22:07,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,268 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-10-16 05:22:07,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:22:07,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:22:07,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:22:07,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:22:07,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,331 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:22:07,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:22:07,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:22:07,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:22:07,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (1/1) ... [2022-10-16 05:22:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:22:07,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:07,395 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) [2022-10-16 05:22:07,419 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 [2022-10-16 05:22:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:22:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:22:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:22:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:22:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:22:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:22:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:22:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:22:07,573 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:22:07,576 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:22:07,912 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:22:07,932 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:22:07,932 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-16 05:22:07,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:22:07 BoogieIcfgContainer [2022-10-16 05:22:07,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:22:07,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:22:07,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:22:07,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:22:07,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:22:06" (1/3) ... [2022-10-16 05:22:07,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec56516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:22:07, skipping insertion in model container [2022-10-16 05:22:07,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:22:07" (2/3) ... [2022-10-16 05:22:07,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec56516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:22:07, skipping insertion in model container [2022-10-16 05:22:07,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:22:07" (3/3) ... [2022-10-16 05:22:07,967 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2022-10-16 05:22:08,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:22:08,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-16 05:22:08,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:22:08,117 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;@490b0be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:22:08,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-16 05:22:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 42 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) [2022-10-16 05:22:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:22:08,132 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:08,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:22:08,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:08,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-16 05:22:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:08,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113455105] [2022-10-16 05:22:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:08,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113455105] [2022-10-16 05:22:08,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113455105] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:22:08,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:22:08,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:22:08,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063327869] [2022-10-16 05:22:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:22:08,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:22:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:22:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:22:08,570 INFO L87 Difference]: Start difference. First operand has 43 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 42 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) [2022-10-16 05:22:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:08,648 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-10-16 05:22:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:22:08,652 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 [2022-10-16 05:22:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:08,662 INFO L225 Difference]: With dead ends: 40 [2022-10-16 05:22:08,662 INFO L226 Difference]: Without dead ends: 38 [2022-10-16 05:22:08,664 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 [2022-10-16 05:22:08,669 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:08,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:22:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-16 05:22:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-16 05:22:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 37 states have internal predecessors, (41), 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) [2022-10-16 05:22:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-10-16 05:22:08,711 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 4 [2022-10-16 05:22:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:08,711 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-10-16 05:22:08,712 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) [2022-10-16 05:22:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-10-16 05:22:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:22:08,713 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:08,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:22:08,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:22:08,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:08,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-16 05:22:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252985937] [2022-10-16 05:22:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:08,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:08,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:08,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252985937] [2022-10-16 05:22:08,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252985937] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:22:08,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:22:08,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:22:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902385224] [2022-10-16 05:22:08,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:22:08,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:22:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:08,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:22:08,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:22:08,936 INFO L87 Difference]: Start difference. First operand 38 states and 41 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) [2022-10-16 05:22:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:08,993 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-10-16 05:22:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:22:08,994 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 [2022-10-16 05:22:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:08,995 INFO L225 Difference]: With dead ends: 41 [2022-10-16 05:22:08,995 INFO L226 Difference]: Without dead ends: 41 [2022-10-16 05:22:08,996 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 [2022-10-16 05:22:08,998 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:08,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:22:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-16 05:22:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-10-16 05:22:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 39 states have internal predecessors, (43), 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) [2022-10-16 05:22:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-10-16 05:22:09,007 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 4 [2022-10-16 05:22:09,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:09,007 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-10-16 05:22:09,008 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) [2022-10-16 05:22:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-10-16 05:22:09,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 05:22:09,009 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:09,009 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-16 05:22:09,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:22:09,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-16 05:22:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:09,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232972318] [2022-10-16 05:22:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:09,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:09,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232972318] [2022-10-16 05:22:09,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232972318] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785756758] [2022-10-16 05:22:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:09,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:09,368 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) [2022-10-16 05:22:09,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 05:22:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-16 05:22:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:09,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:22:09,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:22:09,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:22:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:09,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:22:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:09,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785756758] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:22:09,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:22:09,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-16 05:22:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475250423] [2022-10-16 05:22:09,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:22:09,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:22:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:22:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:22:09,985 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:10,220 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-10-16 05:22:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:22:10,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 05:22:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:10,223 INFO L225 Difference]: With dead ends: 51 [2022-10-16 05:22:10,224 INFO L226 Difference]: Without dead ends: 51 [2022-10-16 05:22:10,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:22:10,226 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:10,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:22:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-16 05:22:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-10-16 05:22:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 48 states have internal predecessors, (54), 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) [2022-10-16 05:22:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-10-16 05:22:10,236 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 7 [2022-10-16 05:22:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:10,237 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-10-16 05:22:10,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-10-16 05:22:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-16 05:22:10,238 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:10,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:10,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-16 05:22:10,453 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 [2022-10-16 05:22:10,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -65957040, now seen corresponding path program 1 times [2022-10-16 05:22:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833441113] [2022-10-16 05:22:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:22:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:10,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833441113] [2022-10-16 05:22:10,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833441113] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:10,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263118055] [2022-10-16 05:22:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:10,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:10,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:10,712 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) [2022-10-16 05:22:10,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 05:22:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:22:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:10,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:22:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:10,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263118055] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:22:10,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:22:10,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-16 05:22:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581683785] [2022-10-16 05:22:10,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:22:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 05:22:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 05:22:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-10-16 05:22:10,859 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:11,137 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2022-10-16 05:22:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 05:22:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-16 05:22:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:11,146 INFO L225 Difference]: With dead ends: 135 [2022-10-16 05:22:11,146 INFO L226 Difference]: Without dead ends: 135 [2022-10-16 05:22:11,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-10-16 05:22:11,151 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:11,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 91 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:22:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-10-16 05:22:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2022-10-16 05:22:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 95 states have (on average 1.4526315789473685) internal successors, (138), 105 states have internal predecessors, (138), 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) [2022-10-16 05:22:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2022-10-16 05:22:11,178 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 12 [2022-10-16 05:22:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:11,179 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2022-10-16 05:22:11,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2022-10-16 05:22:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-16 05:22:11,182 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:11,182 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-16 05:22:11,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:11,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-16 05:22:11,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -278008218, now seen corresponding path program 2 times [2022-10-16 05:22:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:11,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144252373] [2022-10-16 05:22:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:11,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:11,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144252373] [2022-10-16 05:22:11,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144252373] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:11,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318686173] [2022-10-16 05:22:11,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:22:11,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:11,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:11,635 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) [2022-10-16 05:22:11,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 05:22:11,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:22:11,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:22:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 05:22:11,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:22:11,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:22:11,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:22:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:11,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:22:11,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318686173] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:22:11,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:22:11,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:22:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103579747] [2022-10-16 05:22:11,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:22:11,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:22:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:22:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:22:11,965 INFO L87 Difference]: Start difference. First operand 106 states and 138 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) [2022-10-16 05:22:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:12,161 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2022-10-16 05:22:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:22:12,162 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 [2022-10-16 05:22:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:12,163 INFO L225 Difference]: With dead ends: 121 [2022-10-16 05:22:12,163 INFO L226 Difference]: Without dead ends: 121 [2022-10-16 05:22:12,164 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 [2022-10-16 05:22:12,165 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 105 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:12,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 71 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:22:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-16 05:22:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2022-10-16 05:22:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 95 states have (on average 1.3894736842105264) internal successors, (132), 104 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2022-10-16 05:22:12,175 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 16 [2022-10-16 05:22:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:12,175 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2022-10-16 05:22:12,176 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) [2022-10-16 05:22:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2022-10-16 05:22:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 05:22:12,177 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:12,177 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:12,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:12,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:12,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1968650094, now seen corresponding path program 1 times [2022-10-16 05:22:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:12,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432665742] [2022-10-16 05:22:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-16 05:22:12,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432665742] [2022-10-16 05:22:12,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432665742] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:22:12,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:22:12,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:22:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315961203] [2022-10-16 05:22:12,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:22:12,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:22:12,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:22:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:22:12,465 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:12,481 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2022-10-16 05:22:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:22:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-16 05:22:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:12,482 INFO L225 Difference]: With dead ends: 102 [2022-10-16 05:22:12,483 INFO L226 Difference]: Without dead ends: 102 [2022-10-16 05:22:12,483 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 [2022-10-16 05:22:12,486 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:12,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:22:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-10-16 05:22:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-10-16 05:22:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 101 states have internal predecessors, (119), 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) [2022-10-16 05:22:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-10-16 05:22:12,509 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 25 [2022-10-16 05:22:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:12,512 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-10-16 05:22:12,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-10-16 05:22:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 05:22:12,514 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:12,514 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:12,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 05:22:12,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:12,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:12,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1968650093, now seen corresponding path program 1 times [2022-10-16 05:22:12,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:12,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151015253] [2022-10-16 05:22:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:12,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151015253] [2022-10-16 05:22:12,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151015253] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217169763] [2022-10-16 05:22:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:12,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:12,696 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) [2022-10-16 05:22:12,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 05:22:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:22:12,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:12,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:22:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:12,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217169763] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:22:12,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:22:12,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:22:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261002428] [2022-10-16 05:22:12,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:22:12,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:22:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:22:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:22:12,907 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-10-16 05:22:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:13,215 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2022-10-16 05:22:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:22:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 25 [2022-10-16 05:22:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:13,217 INFO L225 Difference]: With dead ends: 236 [2022-10-16 05:22:13,218 INFO L226 Difference]: Without dead ends: 236 [2022-10-16 05:22:13,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:22:13,219 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 376 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:13,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 106 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 05:22:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-10-16 05:22:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2022-10-16 05:22:13,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.2010050251256281) internal successors, (239), 205 states have internal predecessors, (239), 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) [2022-10-16 05:22:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 239 transitions. [2022-10-16 05:22:13,231 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 239 transitions. Word has length 25 [2022-10-16 05:22:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:13,231 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 239 transitions. [2022-10-16 05:22:13,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-10-16 05:22:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 239 transitions. [2022-10-16 05:22:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-16 05:22:13,233 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:13,233 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:13,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:13,446 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 [2022-10-16 05:22:13,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash 556248211, now seen corresponding path program 2 times [2022-10-16 05:22:13,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:13,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357536984] [2022-10-16 05:22:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:13,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:22:13,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:13,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357536984] [2022-10-16 05:22:13,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357536984] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:13,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502986954] [2022-10-16 05:22:13,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:22:13,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:13,927 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) [2022-10-16 05:22:13,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 05:22:13,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:22:13,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:22:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:22:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:14,039 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:22:14,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 05:22:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-16 05:22:14,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:22:14,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502986954] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:22:14,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:22:14,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2022-10-16 05:22:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566743164] [2022-10-16 05:22:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:22:14,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:22:14,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:22:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-10-16 05:22:14,245 INFO L87 Difference]: Start difference. First operand 206 states and 239 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:14,287 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2022-10-16 05:22:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:22:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-10-16 05:22:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:14,290 INFO L225 Difference]: With dead ends: 206 [2022-10-16 05:22:14,290 INFO L226 Difference]: Without dead ends: 206 [2022-10-16 05:22:14,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-10-16 05:22:14,291 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:14,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:22:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-10-16 05:22:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-10-16 05:22:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.1909547738693467) internal successors, (237), 205 states have internal predecessors, (237), 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) [2022-10-16 05:22:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 237 transitions. [2022-10-16 05:22:14,300 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 237 transitions. Word has length 49 [2022-10-16 05:22:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:14,300 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 237 transitions. [2022-10-16 05:22:14,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:22:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 237 transitions. [2022-10-16 05:22:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-16 05:22:14,302 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:14,303 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:14,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:14,516 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 [2022-10-16 05:22:14,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1250100426, now seen corresponding path program 1 times [2022-10-16 05:22:14,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:14,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208560773] [2022-10-16 05:22:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:14,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:22:14,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:14,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208560773] [2022-10-16 05:22:14,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208560773] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:14,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258677771] [2022-10-16 05:22:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:14,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:14,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:14,885 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) [2022-10-16 05:22:14,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 05:22:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:22:14,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:22:15,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:22:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:22:15,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258677771] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:22:15,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:22:15,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-16 05:22:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981279837] [2022-10-16 05:22:15,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:22:15,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 05:22:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 05:22:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:22:15,423 INFO L87 Difference]: Start difference. First operand 206 states and 237 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 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) [2022-10-16 05:22:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:16,159 INFO L93 Difference]: Finished difference Result 474 states and 477 transitions. [2022-10-16 05:22:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 05:22:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 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 53 [2022-10-16 05:22:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:16,163 INFO L225 Difference]: With dead ends: 474 [2022-10-16 05:22:16,163 INFO L226 Difference]: Without dead ends: 474 [2022-10-16 05:22:16,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:22:16,164 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 844 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:16,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 152 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 05:22:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-10-16 05:22:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 414. [2022-10-16 05:22:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 407 states have (on average 1.171990171990172) internal successors, (477), 413 states have internal predecessors, (477), 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) [2022-10-16 05:22:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 477 transitions. [2022-10-16 05:22:16,175 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 477 transitions. Word has length 53 [2022-10-16 05:22:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:16,176 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 477 transitions. [2022-10-16 05:22:16,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 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) [2022-10-16 05:22:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 477 transitions. [2022-10-16 05:22:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-16 05:22:16,180 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:16,180 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:16,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:16,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:16,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash 605209398, now seen corresponding path program 2 times [2022-10-16 05:22:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:16,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303304513] [2022-10-16 05:22:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:16,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:22:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303304513] [2022-10-16 05:22:17,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303304513] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468122377] [2022-10-16 05:22:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:22:17,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:17,734 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) [2022-10-16 05:22:17,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 05:22:17,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:22:17,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:22:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:22:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:22:18,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:22:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:22:19,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468122377] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:22:19,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:22:19,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-16 05:22:19,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229649866] [2022-10-16 05:22:19,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:22:19,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 05:22:19,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 05:22:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:22:19,353 INFO L87 Difference]: Start difference. First operand 414 states and 477 transitions. Second operand has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 65 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) [2022-10-16 05:22:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:21,524 INFO L93 Difference]: Finished difference Result 954 states and 957 transitions. [2022-10-16 05:22:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 05:22:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 65 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) Word has length 101 [2022-10-16 05:22:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:21,532 INFO L225 Difference]: With dead ends: 954 [2022-10-16 05:22:21,532 INFO L226 Difference]: Without dead ends: 954 [2022-10-16 05:22:21,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:22:21,535 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1984 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:21,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1984 Valid, 230 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-16 05:22:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-10-16 05:22:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 830. [2022-10-16 05:22:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 823 states have (on average 1.1628189550425274) internal successors, (957), 829 states have internal predecessors, (957), 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) [2022-10-16 05:22:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 957 transitions. [2022-10-16 05:22:21,557 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 957 transitions. Word has length 101 [2022-10-16 05:22:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:21,557 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 957 transitions. [2022-10-16 05:22:21,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 65 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) [2022-10-16 05:22:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 957 transitions. [2022-10-16 05:22:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-10-16 05:22:21,562 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:21,562 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:21,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:21,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:21,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2010229962, now seen corresponding path program 3 times [2022-10-16 05:22:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:21,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879048001] [2022-10-16 05:22:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:21,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5737 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:22:25,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879048001] [2022-10-16 05:22:25,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879048001] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203597261] [2022-10-16 05:22:25,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:22:25,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:25,938 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) [2022-10-16 05:22:25,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 05:22:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:22:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:22:26,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 05:22:26,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:22:26,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:22:26,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:22:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5737 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-16 05:22:26,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:22:26,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203597261] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:22:26,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:22:26,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [65] total 69 [2022-10-16 05:22:26,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006623169] [2022-10-16 05:22:26,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:22:26,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 05:22:26,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 05:22:26,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2094, Invalid=2598, Unknown=0, NotChecked=0, Total=4692 [2022-10-16 05:22:26,874 INFO L87 Difference]: Start difference. First operand 830 states and 957 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-10-16 05:22:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:26,938 INFO L93 Difference]: Finished difference Result 828 states and 951 transitions. [2022-10-16 05:22:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:22:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 197 [2022-10-16 05:22:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:26,944 INFO L225 Difference]: With dead ends: 828 [2022-10-16 05:22:26,944 INFO L226 Difference]: Without dead ends: 828 [2022-10-16 05:22:26,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2094, Invalid=2598, Unknown=0, NotChecked=0, Total=4692 [2022-10-16 05:22:26,947 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:26,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 33 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:22:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-10-16 05:22:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2022-10-16 05:22:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 823 states have (on average 1.1555285540704738) internal successors, (951), 827 states have internal predecessors, (951), 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) [2022-10-16 05:22:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 951 transitions. [2022-10-16 05:22:26,964 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 951 transitions. Word has length 197 [2022-10-16 05:22:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:26,965 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 951 transitions. [2022-10-16 05:22:26,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-10-16 05:22:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 951 transitions. [2022-10-16 05:22:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-10-16 05:22:26,968 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:26,968 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:27,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:27,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-16 05:22:27,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2107380589, now seen corresponding path program 1 times [2022-10-16 05:22:27,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:27,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24714919] [2022-10-16 05:22:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:27,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:22:30,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:22:30,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24714919] [2022-10-16 05:22:30,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24714919] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:22:30,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326817590] [2022-10-16 05:22:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:30,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:22:30,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:22:30,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 05:22:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:22:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:22:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:22:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:22:31,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:22:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:22:36,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326817590] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:22:36,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:22:36,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-16 05:22:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767753113] [2022-10-16 05:22:36,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:22:36,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-16 05:22:36,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:22:36,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-16 05:22:36,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:22:36,846 INFO L87 Difference]: Start difference. First operand 828 states and 951 transitions. Second operand has 129 states, 129 states have (on average 3.007751937984496) internal successors, (388), 129 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) [2022-10-16 05:22:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:22:50,305 INFO L93 Difference]: Finished difference Result 1908 states and 1911 transitions. [2022-10-16 05:22:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-16 05:22:50,306 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.007751937984496) internal successors, (388), 129 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) Word has length 198 [2022-10-16 05:22:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:22:50,315 INFO L225 Difference]: With dead ends: 1908 [2022-10-16 05:22:50,315 INFO L226 Difference]: Without dead ends: 1908 [2022-10-16 05:22:50,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:22:50,321 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4938 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4938 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-16 05:22:50,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4938 Valid, 398 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-16 05:22:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-10-16 05:22:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1660. [2022-10-16 05:22:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1655 states have (on average 1.1546827794561934) internal successors, (1911), 1659 states have internal predecessors, (1911), 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) [2022-10-16 05:22:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 1911 transitions. [2022-10-16 05:22:50,355 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 1911 transitions. Word has length 198 [2022-10-16 05:22:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:22:50,355 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 1911 transitions. [2022-10-16 05:22:50,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.007751937984496) internal successors, (388), 129 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) [2022-10-16 05:22:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 1911 transitions. [2022-10-16 05:22:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-10-16 05:22:50,362 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:22:50,363 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:22:50,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 05:22:50,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:22:50,577 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:22:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:22:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1735855251, now seen corresponding path program 2 times [2022-10-16 05:22:50,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:22:50,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211733494] [2022-10-16 05:22:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:22:50,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:22:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23754 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:23:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:03,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211733494] [2022-10-16 05:23:03,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211733494] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:03,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16735439] [2022-10-16 05:23:03,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:23:03,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:03,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:23:03,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 05:23:03,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:23:03,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:23:03,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:23:03,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:03,996 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:23:03,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 05:23:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23754 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 23752 trivial. 0 not checked. [2022-10-16 05:23:06,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:23:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23754 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23752 trivial. 0 not checked. [2022-10-16 05:23:12,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16735439] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:23:12,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:23:12,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 4, 4] total 135 [2022-10-16 05:23:12,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760929784] [2022-10-16 05:23:12,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:23:12,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-10-16 05:23:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-10-16 05:23:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8275, Invalid=9815, Unknown=0, NotChecked=0, Total=18090 [2022-10-16 05:23:12,213 INFO L87 Difference]: Start difference. First operand 1660 states and 1911 transitions. Second operand has 135 states, 135 states have (on average 3.0814814814814815) internal successors, (416), 135 states have internal predecessors, (416), 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) [2022-10-16 05:23:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:38,745 INFO L93 Difference]: Finished difference Result 1688 states and 1691 transitions. [2022-10-16 05:23:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-10-16 05:23:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.0814814814814815) internal successors, (416), 135 states have internal predecessors, (416), 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 390 [2022-10-16 05:23:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:38,754 INFO L225 Difference]: With dead ends: 1688 [2022-10-16 05:23:38,754 INFO L226 Difference]: Without dead ends: 1688 [2022-10-16 05:23:38,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=25689, Invalid=43743, Unknown=0, NotChecked=0, Total=69432 [2022-10-16 05:23:38,761 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7848 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 2235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7848 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 3694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2235 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:38,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7848 Valid, 326 Invalid, 3694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2235 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-16 05:23:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-10-16 05:23:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1686. [2022-10-16 05:23:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1682 states have (on average 1.0041617122473245) internal successors, (1689), 1685 states have internal predecessors, (1689), 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) [2022-10-16 05:23:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 1689 transitions. [2022-10-16 05:23:38,793 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 1689 transitions. Word has length 390 [2022-10-16 05:23:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:38,794 INFO L495 AbstractCegarLoop]: Abstraction has 1686 states and 1689 transitions. [2022-10-16 05:23:38,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.0814814814814815) internal successors, (416), 135 states have internal predecessors, (416), 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) [2022-10-16 05:23:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 1689 transitions. [2022-10-16 05:23:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1673 [2022-10-16 05:23:38,892 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:38,893 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:38,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:39,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 05:23:39,107 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash -150047969, now seen corresponding path program 1 times [2022-10-16 05:23:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:39,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200029120] [2022-10-16 05:23:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:24:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 106176 backedges. 0 proven. 24512 refuted. 0 times theorem prover too weak. 81664 trivial. 0 not checked. [2022-10-16 05:24:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:24:11,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200029120] [2022-10-16 05:24:11,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200029120] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:24:11,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928872888] [2022-10-16 05:24:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:24:11,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:24:11,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:24:11,895 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:24:11,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 05:24:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:24:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 6072 conjuncts, 130 conjunts are in the unsatisfiable core [2022-10-16 05:24:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:24:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 106176 backedges. 0 proven. 24512 refuted. 0 times theorem prover too weak. 81664 trivial. 0 not checked. [2022-10-16 05:24:13,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:24:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 106176 backedges. 0 proven. 24512 refuted. 0 times theorem prover too weak. 81664 trivial. 0 not checked. [2022-10-16 05:24:36,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928872888] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:24:36,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:24:36,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2022-10-16 05:24:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535369122] [2022-10-16 05:24:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:24:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-10-16 05:24:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:24:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-10-16 05:24:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:24:36,078 INFO L87 Difference]: Start difference. First operand 1686 states and 1689 transitions. Second operand has 261 states, 261 states have (on average 3.0306513409961684) internal successors, (791), 261 states have internal predecessors, (791), 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)