/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:16:41,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:16:41,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:16:41,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:16:41,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:16:41,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:16:41,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:16:41,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:16:41,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:16:41,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:16:41,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:16:41,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:16:41,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:16:41,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:16:41,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:16:41,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:16:41,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:16:41,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:16:41,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:16:41,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:16:41,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:16:41,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:16:41,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:16:41,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:16:41,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:16:41,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:16:41,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:16:41,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:16:41,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:16:41,306 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:16:41,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:16:41,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:16:41,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:16:41,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:16:41,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:16:41,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:16:41,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:16:41,309 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:16:41,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:16:41,310 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:16:41,310 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:16:41,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:16:41,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:16:41,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:16:41,311 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:16:41,311 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:16:41,311 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:16:41,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:16:41,312 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:16:41,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:16:41,312 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:16:41,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:16:41,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:16:41,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:16:41,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:16:41,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:16:41,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:16:41,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:16:41,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:16:41,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:16:41,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:16:41,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:16:41,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:16:41,804 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:16:41,805 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:16:41,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_2-2.i [2022-10-15 18:16:41,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b8b27cd/52822419a14c4c78a280fa64139296e1/FLAGf8fa94d82 [2022-10-15 18:16:42,539 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:16:42,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2.i [2022-10-15 18:16:42,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b8b27cd/52822419a14c4c78a280fa64139296e1/FLAGf8fa94d82 [2022-10-15 18:16:42,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b8b27cd/52822419a14c4c78a280fa64139296e1 [2022-10-15 18:16:42,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:16:42,913 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:16:42,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:16:42,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:16:42,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:16:42,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:16:42" (1/1) ... [2022-10-15 18:16:42,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b6e2c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:42, skipping insertion in model container [2022-10-15 18:16:42,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:16:42" (1/1) ... [2022-10-15 18:16:42,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:16:42,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:16:43,112 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2.i[849,862] [2022-10-15 18:16:43,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:16:43,141 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:16:43,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2.i[849,862] [2022-10-15 18:16:43,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:16:43,181 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:16:43,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43 WrapperNode [2022-10-15 18:16:43,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:16:43,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:16:43,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:16:43,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:16:43,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,226 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2022-10-15 18:16:43,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:16:43,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:16:43,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:16:43,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:16:43,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:16:43,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:16:43,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:16:43,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:16:43,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (1/1) ... [2022-10-15 18:16:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:16:43,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:43,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:16:43,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:16:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:16:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:16:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:16:43,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:16:43,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:16:43,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:16:43,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:16:43,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:16:43,450 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:16:43,452 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:16:43,766 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:16:43,784 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:16:43,784 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-15 18:16:43,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:16:43 BoogieIcfgContainer [2022-10-15 18:16:43,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:16:43,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:16:43,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:16:43,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:16:43,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:16:42" (1/3) ... [2022-10-15 18:16:43,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226f66c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:16:43, skipping insertion in model container [2022-10-15 18:16:43,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:16:43" (2/3) ... [2022-10-15 18:16:43,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226f66c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:16:43, skipping insertion in model container [2022-10-15 18:16:43,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:16:43" (3/3) ... [2022-10-15 18:16:43,839 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2022-10-15 18:16:43,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:16:43,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-15 18:16:44,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:16:44,034 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;@271bb1b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:16:44,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-15 18:16:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 36 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) [2022-10-15 18:16:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:16:44,073 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:44,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:16:44,075 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)] === [2022-10-15 18:16:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:44,086 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:16:44,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:44,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161024639] [2022-10-15 18:16:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:44,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:44,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:44,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161024639] [2022-10-15 18:16:44,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161024639] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:16:44,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:16:44,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:16:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956396649] [2022-10-15 18:16:44,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:16:44,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:16:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:16:44,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:44,678 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 36 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:44,740 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-10-15 18:16:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:16:44,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:16:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:44,754 INFO L225 Difference]: With dead ends: 34 [2022-10-15 18:16:44,754 INFO L226 Difference]: Without dead ends: 32 [2022-10-15 18:16:44,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:44,762 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:44,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:16:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-15 18:16:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-10-15 18:16:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-10-15 18:16:44,806 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 4 [2022-10-15 18:16:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:44,807 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-10-15 18:16:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-10-15 18:16:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:16:44,808 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:44,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:16:44,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:16:44,809 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)] === [2022-10-15 18:16:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:16:44,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:44,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985945795] [2022-10-15 18:16:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:44,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:44,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:44,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985945795] [2022-10-15 18:16:44,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985945795] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:16:44,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:16:44,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:16:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220948410] [2022-10-15 18:16:44,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:16:44,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:16:44,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:16:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:44,996 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:45,051 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-10-15 18:16:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:16:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:16:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:45,053 INFO L225 Difference]: With dead ends: 40 [2022-10-15 18:16:45,053 INFO L226 Difference]: Without dead ends: 40 [2022-10-15 18:16:45,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:45,056 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:45,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:16:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-15 18:16:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-10-15 18:16:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-10-15 18:16:45,064 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 4 [2022-10-15 18:16:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:45,065 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-10-15 18:16:45,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-10-15 18:16:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 18:16:45,066 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:45,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 18:16:45,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:16:45,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:16:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 889659654, now seen corresponding path program 1 times [2022-10-15 18:16:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:45,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222422339] [2022-10-15 18:16:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:45,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:45,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222422339] [2022-10-15 18:16:45,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222422339] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:16:45,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:16:45,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:16:45,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784838544] [2022-10-15 18:16:45,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:16:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:16:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:16:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:45,134 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:45,160 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-10-15 18:16:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:16:45,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-15 18:16:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:45,161 INFO L225 Difference]: With dead ends: 31 [2022-10-15 18:16:45,161 INFO L226 Difference]: Without dead ends: 31 [2022-10-15 18:16:45,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:45,164 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 20 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 [2022-10-15 18:16:45,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:16:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-15 18:16:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-10-15 18:16:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.391304347826087) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-10-15 18:16:45,170 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 6 [2022-10-15 18:16:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:45,171 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-10-15 18:16:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-10-15 18:16:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 18:16:45,172 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:45,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 18:16:45,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 18:16:45,173 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)] === [2022-10-15 18:16:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash 889659655, now seen corresponding path program 1 times [2022-10-15 18:16:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:45,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501699257] [2022-10-15 18:16:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:45,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501699257] [2022-10-15 18:16:45,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501699257] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:16:45,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:16:45,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:16:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856372436] [2022-10-15 18:16:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:16:45,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:16:45,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:16:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:45,318 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:45,371 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-10-15 18:16:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:16:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-15 18:16:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:45,373 INFO L225 Difference]: With dead ends: 35 [2022-10-15 18:16:45,374 INFO L226 Difference]: Without dead ends: 35 [2022-10-15 18:16:45,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:16:45,376 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:45,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:16:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-15 18:16:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-10-15 18:16:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.36) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-10-15 18:16:45,384 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 6 [2022-10-15 18:16:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:45,384 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-10-15 18:16:45,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-10-15 18:16:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 18:16:45,385 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:45,386 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:16:45,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:16:45,386 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)] === [2022-10-15 18:16:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:45,387 INFO L85 PathProgramCache]: Analyzing trace with hash 719163786, now seen corresponding path program 1 times [2022-10-15 18:16:45,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:45,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069928280] [2022-10-15 18:16:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:45,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:45,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:45,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069928280] [2022-10-15 18:16:45,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069928280] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:45,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838536891] [2022-10-15 18:16:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:45,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:45,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:16:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:45,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 18:16:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:16:45,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:16:45,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:16:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:46,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:16:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:46,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838536891] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:16:46,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:16:46,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-10-15 18:16:46,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651159732] [2022-10-15 18:16:46,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:16:46,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:16:46,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:16:46,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:16:46,218 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:46,379 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-10-15 18:16:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:16:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 18:16:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:46,386 INFO L225 Difference]: With dead ends: 53 [2022-10-15 18:16:46,386 INFO L226 Difference]: Without dead ends: 53 [2022-10-15 18:16:46,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:16:46,390 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:46,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 48 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:16:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-15 18:16:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-10-15 18:16:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3170731707317074) 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) [2022-10-15 18:16:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-10-15 18:16:46,399 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 10 [2022-10-15 18:16:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:46,400 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-10-15 18:16:46,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-10-15 18:16:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 18:16:46,401 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:46,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:16:46,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:46,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:46,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:16:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash -373337781, now seen corresponding path program 1 times [2022-10-15 18:16:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:46,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484411075] [2022-10-15 18:16:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:46,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484411075] [2022-10-15 18:16:46,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484411075] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:46,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392888771] [2022-10-15 18:16:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:46,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:46,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:16:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:16:46,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:46,926 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:16:46,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 18:16:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:47,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:16:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:47,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392888771] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:16:47,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:16:47,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:16:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166301421] [2022-10-15 18:16:47,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:16:47,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:16:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:16:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:16:47,092 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:47,216 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-10-15 18:16:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:16:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 18:16:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:47,218 INFO L225 Difference]: With dead ends: 53 [2022-10-15 18:16:47,218 INFO L226 Difference]: Without dead ends: 53 [2022-10-15 18:16:47,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:16:47,220 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:47,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:16:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-15 18:16:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-10-15 18:16:47,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.255813953488372) internal successors, (54), 50 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) [2022-10-15 18:16:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-10-15 18:16:47,227 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 12 [2022-10-15 18:16:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:47,227 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-10-15 18:16:47,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-10-15 18:16:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:16:47,229 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:47,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:16:47,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:47,443 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,SelfDestructingSolverStorable5 [2022-10-15 18:16:47,444 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)] === [2022-10-15 18:16:47,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1824164062, now seen corresponding path program 1 times [2022-10-15 18:16:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:47,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865935871] [2022-10-15 18:16:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:16:47,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:47,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865935871] [2022-10-15 18:16:47,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865935871] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86855329] [2022-10-15 18:16:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:47,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:47,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:47,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:16:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:16:47,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:47,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:16:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:47,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86855329] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:16:47,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:16:47,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-15 18:16:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108727964] [2022-10-15 18:16:47,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:16:47,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 18:16:47,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 18:16:47,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:16:47,777 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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) [2022-10-15 18:16:48,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:48,009 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-10-15 18:16:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 18:16:48,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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 18 [2022-10-15 18:16:48,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:48,011 INFO L225 Difference]: With dead ends: 97 [2022-10-15 18:16:48,011 INFO L226 Difference]: Without dead ends: 97 [2022-10-15 18:16:48,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-10-15 18:16:48,013 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 171 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:48,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 41 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:16:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-15 18:16:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2022-10-15 18:16:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-10-15 18:16:48,022 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 18 [2022-10-15 18:16:48,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:48,022 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-10-15 18:16:48,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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) [2022-10-15 18:16:48,023 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-10-15 18:16:48,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 18:16:48,023 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:48,024 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-15 18:16:48,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:48,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:48,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:16:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1808870570, now seen corresponding path program 2 times [2022-10-15 18:16:48,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637072251] [2022-10-15 18:16:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:48,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:48,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637072251] [2022-10-15 18:16:48,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637072251] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:48,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346061518] [2022-10-15 18:16:48,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:16:48,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:48,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:48,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:48,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:16:48,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:16:48,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:16:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 18:16:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:48,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:16:48,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:16:48,712 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 [2022-10-15 18:16:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:48,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:16:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:49,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346061518] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:16:49,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:16:49,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-10-15 18:16:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903779355] [2022-10-15 18:16:49,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:16:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 18:16:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 18:16:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:16:49,239 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:49,675 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2022-10-15 18:16:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:16:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 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 28 [2022-10-15 18:16:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:49,677 INFO L225 Difference]: With dead ends: 120 [2022-10-15 18:16:49,677 INFO L226 Difference]: Without dead ends: 120 [2022-10-15 18:16:49,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:16:49,679 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:49,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 130 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:16:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-10-15 18:16:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2022-10-15 18:16:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 110 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-10-15 18:16:49,689 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 28 [2022-10-15 18:16:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:49,689 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-10-15 18:16:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-10-15 18:16:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 18:16:49,691 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:49,691 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:16:49,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:49,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:49,905 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)] === [2022-10-15 18:16:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:49,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1137135639, now seen corresponding path program 2 times [2022-10-15 18:16:49,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:49,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679925940] [2022-10-15 18:16:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:49,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:50,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679925940] [2022-10-15 18:16:50,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679925940] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:50,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767782686] [2022-10-15 18:16:50,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:16:50,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:50,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:50,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:16:50,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:16:50,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:16:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:16:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:50,267 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:16:50,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 18:16:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-15 18:16:50,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:16:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-15 18:16:50,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767782686] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:16:50,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:16:50,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-10-15 18:16:50,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660711814] [2022-10-15 18:16:50,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:16:50,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 18:16:50,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 18:16:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:16:50,966 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:51,402 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-10-15 18:16:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 18:16:51,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 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 30 [2022-10-15 18:16:51,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:51,404 INFO L225 Difference]: With dead ends: 114 [2022-10-15 18:16:51,404 INFO L226 Difference]: Without dead ends: 114 [2022-10-15 18:16:51,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-10-15 18:16:51,406 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 176 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:51,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 122 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:16:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-10-15 18:16:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-10-15 18:16:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 107 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2022-10-15 18:16:51,415 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 30 [2022-10-15 18:16:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:51,415 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2022-10-15 18:16:51,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2022-10-15 18:16:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-15 18:16:51,417 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:51,418 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:16:51,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:51,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:51,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:16:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:51,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1592996191, now seen corresponding path program 1 times [2022-10-15 18:16:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:51,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633045490] [2022-10-15 18:16:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:51,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:16:51,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:51,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633045490] [2022-10-15 18:16:51,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633045490] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:51,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673161348] [2022-10-15 18:16:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:51,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:51,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:51,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:16:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:16:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:16:51,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:16:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:16:52,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673161348] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:16:52,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:16:52,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:16:52,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275963475] [2022-10-15 18:16:52,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:16:52,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:16:52,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:16:52,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:16:52,086 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:52,306 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2022-10-15 18:16:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:16:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 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 47 [2022-10-15 18:16:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:52,308 INFO L225 Difference]: With dead ends: 186 [2022-10-15 18:16:52,309 INFO L226 Difference]: Without dead ends: 186 [2022-10-15 18:16:52,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:16:52,310 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 209 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:52,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 119 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:16:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-10-15 18:16:52,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 171. [2022-10-15 18:16:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 170 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2022-10-15 18:16:52,322 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 47 [2022-10-15 18:16:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:52,322 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2022-10-15 18:16:52,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2022-10-15 18:16:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-15 18:16:52,325 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:52,325 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1] [2022-10-15 18:16:52,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:52,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:52,539 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:16:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash -317127186, now seen corresponding path program 3 times [2022-10-15 18:16:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:52,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176506659] [2022-10-15 18:16:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:16:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176506659] [2022-10-15 18:16:53,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176506659] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480190450] [2022-10-15 18:16:53,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:16:53,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:53,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:53,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:53,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:16:53,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:16:53,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:16:53,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:16:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:53,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:16:53,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:16:53,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:16:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-10-15 18:16:53,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:16:53,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480190450] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:16:53,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:16:53,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2022-10-15 18:16:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280020777] [2022-10-15 18:16:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:16:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:16:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:16:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:16:53,738 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:53,787 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2022-10-15 18:16:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:16:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 64 [2022-10-15 18:16:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:53,789 INFO L225 Difference]: With dead ends: 169 [2022-10-15 18:16:53,789 INFO L226 Difference]: Without dead ends: 169 [2022-10-15 18:16:53,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:16:53,791 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:53,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:16:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-10-15 18:16:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-10-15 18:16:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-10-15 18:16:53,799 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 64 [2022-10-15 18:16:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:53,799 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-10-15 18:16:53,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-10-15 18:16:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-10-15 18:16:53,805 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:53,805 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-10-15 18:16:53,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:54,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:16:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 756577340, now seen corresponding path program 1 times [2022-10-15 18:16:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:54,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632644266] [2022-10-15 18:16:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:54,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-10-15 18:16:54,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632644266] [2022-10-15 18:16:54,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632644266] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:54,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074850933] [2022-10-15 18:16:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:54,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:54,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:16:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:54,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:16:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-10-15 18:16:55,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:16:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-10-15 18:16:55,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074850933] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:16:55,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:16:55,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:16:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880690070] [2022-10-15 18:16:55,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:16:55,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:16:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:16:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:16:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:16:55,588 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 33 states, 33 states have (on average 5.696969696969697) internal successors, (188), 33 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:16:56,058 INFO L93 Difference]: Finished difference Result 345 states and 346 transitions. [2022-10-15 18:16:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:16:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.696969696969697) internal successors, (188), 33 states have internal predecessors, (188), 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 160 [2022-10-15 18:16:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:16:56,061 INFO L225 Difference]: With dead ends: 345 [2022-10-15 18:16:56,061 INFO L226 Difference]: Without dead ends: 345 [2022-10-15 18:16:56,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:16:56,066 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 614 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:16:56,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 127 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:16:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-10-15 18:16:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-10-15 18:16:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 342 states have (on average 1.0116959064327486) internal successors, (346), 344 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 346 transitions. [2022-10-15 18:16:56,087 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 346 transitions. Word has length 160 [2022-10-15 18:16:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:16:56,088 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 346 transitions. [2022-10-15 18:16:56,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.696969696969697) internal successors, (188), 33 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:16:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 346 transitions. [2022-10-15 18:16:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-10-15 18:16:56,104 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:16:56,104 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2022-10-15 18:16:56,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:16:56,305 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,SelfDestructingSolverStorable11 [2022-10-15 18:16:56,306 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:16:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:16:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash 805164412, now seen corresponding path program 2 times [2022-10-15 18:16:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:16:56,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525831935] [2022-10-15 18:16:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:16:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:16:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:16:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2022-10-15 18:16:59,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:16:59,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525831935] [2022-10-15 18:16:59,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525831935] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:16:59,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964218183] [2022-10-15 18:16:59,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:16:59,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:16:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:16:59,093 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:16:59,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 18:16:59,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:16:59,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:16:59,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:16:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:16:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:16:59,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:16:59,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:17:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4845 trivial. 0 not checked. [2022-10-15 18:17:00,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:17:00,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964218183] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:17:00,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:17:00,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [33] total 34 [2022-10-15 18:17:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646958099] [2022-10-15 18:17:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:17:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:17:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:17:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:17:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 18:17:00,765 INFO L87 Difference]: Start difference. First operand 345 states and 346 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:17:00,781 INFO L93 Difference]: Finished difference Result 344 states and 345 transitions. [2022-10-15 18:17:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:17:00,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 336 [2022-10-15 18:17:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:17:00,787 INFO L225 Difference]: With dead ends: 344 [2022-10-15 18:17:00,787 INFO L226 Difference]: Without dead ends: 344 [2022-10-15 18:17:00,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 18:17:00,791 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:17:00,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:17:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-10-15 18:17:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-10-15 18:17:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 342 states have (on average 1.0087719298245614) internal successors, (345), 343 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 345 transitions. [2022-10-15 18:17:00,808 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 345 transitions. Word has length 336 [2022-10-15 18:17:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:17:00,811 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 345 transitions. [2022-10-15 18:17:00,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 345 transitions. [2022-10-15 18:17:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-10-15 18:17:00,818 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:17:00,818 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:17:00,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 18:17:01,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-15 18:17:01,033 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:17:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:17:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1445388161, now seen corresponding path program 1 times [2022-10-15 18:17:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:17:01,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064406072] [2022-10-15 18:17:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:17:01,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:17:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:17:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2022-10-15 18:17:03,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:17:03,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064406072] [2022-10-15 18:17:03,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064406072] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:17:03,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591158870] [2022-10-15 18:17:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:17:03,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:17:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:17:03,545 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) [2022-10-15 18:17:03,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 18:17:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:17:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:17:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:17:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2022-10-15 18:17:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:17:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2022-10-15 18:17:05,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591158870] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:17:05,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:17:05,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:17:05,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139766029] [2022-10-15 18:17:05,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:17:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:17:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:17:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:17:05,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:17:05,583 INFO L87 Difference]: Start difference. First operand 344 states and 345 transitions. Second operand has 65 states, 65 states have (on average 5.907692307692308) internal successors, (384), 65 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:17:06,821 INFO L93 Difference]: Finished difference Result 696 states and 697 transitions. [2022-10-15 18:17:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:17:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.907692307692308) internal successors, (384), 65 states have internal predecessors, (384), 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 340 [2022-10-15 18:17:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:17:06,825 INFO L225 Difference]: With dead ends: 696 [2022-10-15 18:17:06,825 INFO L226 Difference]: Without dead ends: 696 [2022-10-15 18:17:06,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:17:06,828 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1369 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:17:06,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 265 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:17:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-10-15 18:17:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 696. [2022-10-15 18:17:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 694 states have (on average 1.0043227665706052) internal successors, (697), 695 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 697 transitions. [2022-10-15 18:17:06,865 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 697 transitions. Word has length 340 [2022-10-15 18:17:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:17:06,866 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 697 transitions. [2022-10-15 18:17:06,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.907692307692308) internal successors, (384), 65 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 697 transitions. [2022-10-15 18:17:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-10-15 18:17:06,889 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:17:06,889 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:17:06,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 18:17:07,102 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,SelfDestructingSolverStorable13 [2022-10-15 18:17:07,103 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:17:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:17:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 177251071, now seen corresponding path program 2 times [2022-10-15 18:17:07,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:17:07,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500535974] [2022-10-15 18:17:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:17:07,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:17:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:17:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 9517 trivial. 0 not checked. [2022-10-15 18:17:14,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:17:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500535974] [2022-10-15 18:17:14,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500535974] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:17:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080577019] [2022-10-15 18:17:14,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:17:14,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:17:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:17:14,594 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) [2022-10-15 18:17:14,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 18:17:15,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:17:15,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:17:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-15 18:17:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:17:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 9517 trivial. 0 not checked. [2022-10-15 18:17:15,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:17:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 9517 trivial. 0 not checked. [2022-10-15 18:17:21,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080577019] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:17:21,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:17:21,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-15 18:17:21,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869792541] [2022-10-15 18:17:21,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:17:21,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-15 18:17:21,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:17:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-15 18:17:21,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-15 18:17:21,769 INFO L87 Difference]: Start difference. First operand 696 states and 697 transitions. Second operand has 129 states, 129 states have (on average 5.953488372093023) internal successors, (768), 129 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:17:29,742 INFO L93 Difference]: Finished difference Result 1400 states and 1401 transitions. [2022-10-15 18:17:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-15 18:17:29,742 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 5.953488372093023) internal successors, (768), 129 states have internal predecessors, (768), 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 692 [2022-10-15 18:17:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:17:29,749 INFO L225 Difference]: With dead ends: 1400 [2022-10-15 18:17:29,749 INFO L226 Difference]: Without dead ends: 1400 [2022-10-15 18:17:29,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1447 GetRequests, 1320 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-15 18:17:29,754 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3533 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:17:29,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 418 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-15 18:17:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-10-15 18:17:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2022-10-15 18:17:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1398 states have (on average 1.002145922746781) internal successors, (1401), 1399 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1401 transitions. [2022-10-15 18:17:29,783 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1401 transitions. Word has length 692 [2022-10-15 18:17:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:17:29,784 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1401 transitions. [2022-10-15 18:17:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 5.953488372093023) internal successors, (768), 129 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:17:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1401 transitions. [2022-10-15 18:17:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1397 [2022-10-15 18:17:29,803 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:17:29,804 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:17:29,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-10-15 18:17:30,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 18:17:30,021 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 18:17:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:17:30,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1538807809, now seen corresponding path program 3 times [2022-10-15 18:17:30,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:17:30,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131243665] [2022-10-15 18:17:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:17:30,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:17:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat