/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/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 00:43:53,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 00:43:53,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 00:43:53,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 00:43:53,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 00:43:53,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 00:43:53,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 00:43:53,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 00:43:53,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 00:43:53,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 00:43:53,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 00:43:53,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 00:43:53,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 00:43:53,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 00:43:53,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 00:43:53,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 00:43:53,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 00:43:53,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 00:43:53,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 00:43:53,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 00:43:53,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 00:43:53,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 00:43:53,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 00:43:53,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 00:43:53,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 00:43:53,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 00:43:53,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 00:43:53,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 00:43:53,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 00:43:53,743 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 00:43:53,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 00:43:53,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 00:43:53,745 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 00:43:53,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 00:43:53,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 00:43:53,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 00:43:53,746 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 00:43:53,746 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 00:43:53,746 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 00:43:53,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 00:43:53,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 00:43:53,747 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 00:43:53,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 00:43:53,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 00:43:53,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 00:43:53,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 00:43:53,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 00:43:53,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 00:43:53,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 00:43:53,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 00:43:53,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 00:43:53,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 00:43:54,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 00:43:54,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 00:43:54,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 00:43:54,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 00:43:54,200 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 00:43:54,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2022-10-16 00:43:54,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20eb8a0b1/4d3711ff8cd14eeca10e5235ccb5f4e5/FLAG9c5d87eab [2022-10-16 00:43:54,822 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 00:43:54,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2022-10-16 00:43:54,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20eb8a0b1/4d3711ff8cd14eeca10e5235ccb5f4e5/FLAG9c5d87eab [2022-10-16 00:43:55,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20eb8a0b1/4d3711ff8cd14eeca10e5235ccb5f4e5 [2022-10-16 00:43:55,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 00:43:55,223 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 00:43:55,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 00:43:55,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 00:43:55,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 00:43:55,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77fab169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55, skipping insertion in model container [2022-10-16 00:43:55,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 00:43:55,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 00:43:55,401 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/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2022-10-16 00:43:55,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 00:43:55,442 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 00:43:55,460 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/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2022-10-16 00:43:55,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 00:43:55,487 INFO L208 MainTranslator]: Completed translation [2022-10-16 00:43:55,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55 WrapperNode [2022-10-16 00:43:55,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 00:43:55,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 00:43:55,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 00:43:55,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 00:43:55,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,529 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-10-16 00:43:55,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 00:43:55,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 00:43:55,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 00:43:55,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 00:43:55,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,555 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 00:43:55,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 00:43:55,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 00:43:55,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 00:43:55,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (1/1) ... [2022-10-16 00:43:55,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 00:43:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:43:55,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 00:43:55,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 00:43:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 00:43:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 00:43:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 00:43:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 00:43:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 00:43:55,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 00:43:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 00:43:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 00:43:55,810 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 00:43:55,814 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 00:43:56,127 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 00:43:56,142 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 00:43:56,142 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-16 00:43:56,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:43:56 BoogieIcfgContainer [2022-10-16 00:43:56,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 00:43:56,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 00:43:56,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 00:43:56,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 00:43:56,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:43:55" (1/3) ... [2022-10-16 00:43:56,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bde8f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:43:56, skipping insertion in model container [2022-10-16 00:43:56,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:43:55" (2/3) ... [2022-10-16 00:43:56,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bde8f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:43:56, skipping insertion in model container [2022-10-16 00:43:56,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:43:56" (3/3) ... [2022-10-16 00:43:56,157 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2022-10-16 00:43:56,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 00:43:56,180 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-10-16 00:43:56,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 00:43:56,268 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;@519e9353, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 00:43:56,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-10-16 00:43:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 29 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) [2022-10-16 00:43:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 00:43:56,312 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:56,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 00:43:56,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2022-10-16 00:43:56,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:56,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3597645] [2022-10-16 00:43:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:56,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:56,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:56,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3597645] [2022-10-16 00:43:56,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3597645] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:43:56,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:43:56,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:43:56,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600889337] [2022-10-16 00:43:56,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:43:56,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-16 00:43:56,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-16 00:43:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-16 00:43:56,630 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 29 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) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:56,648 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-10-16 00:43:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-16 00:43:56,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 00:43:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:56,660 INFO L225 Difference]: With dead ends: 30 [2022-10-16 00:43:56,660 INFO L226 Difference]: Without dead ends: 28 [2022-10-16 00:43:56,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-16 00:43:56,668 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:56,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:43:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-16 00:43:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-10-16 00:43:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-10-16 00:43:56,711 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 4 [2022-10-16 00:43:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:56,711 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-10-16 00:43:56,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-10-16 00:43:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 00:43:56,713 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:56,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 00:43:56,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 00:43:56,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2022-10-16 00:43:56,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:56,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046818601] [2022-10-16 00:43:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:56,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046818601] [2022-10-16 00:43:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046818601] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:43:56,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:43:56,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 00:43:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131394189] [2022-10-16 00:43:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:43:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:43:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:43:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:56,833 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:56,868 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-10-16 00:43:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:43:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 00:43:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:56,870 INFO L225 Difference]: With dead ends: 42 [2022-10-16 00:43:56,870 INFO L226 Difference]: Without dead ends: 42 [2022-10-16 00:43:56,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:56,873 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:56,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:43:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-16 00:43:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2022-10-16 00:43:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-10-16 00:43:56,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 4 [2022-10-16 00:43:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:56,881 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-10-16 00:43:56,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-10-16 00:43:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 00:43:56,882 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:56,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 00:43:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 00:43:56,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 00:43:56,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:56,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660554624] [2022-10-16 00:43:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:56,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:56,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:56,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660554624] [2022-10-16 00:43:56,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660554624] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:43:56,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:43:56,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:43:56,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900194593] [2022-10-16 00:43:56,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:43:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:43:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:43:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:56,977 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:57,033 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-10-16 00:43:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:43:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 00:43:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:57,034 INFO L225 Difference]: With dead ends: 25 [2022-10-16 00:43:57,035 INFO L226 Difference]: Without dead ends: 25 [2022-10-16 00:43:57,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:57,037 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:57,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:43:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-16 00:43:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-16 00:43:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-10-16 00:43:57,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 4 [2022-10-16 00:43:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:57,047 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-10-16 00:43:57,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-10-16 00:43:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 00:43:57,047 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:57,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 00:43:57,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 00:43:57,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 00:43:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:57,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249666667] [2022-10-16 00:43:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:57,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:57,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249666667] [2022-10-16 00:43:57,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249666667] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:43:57,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:43:57,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:43:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634506490] [2022-10-16 00:43:57,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:43:57,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:43:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:57,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:43:57,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:57,251 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:57,286 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-10-16 00:43:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:43:57,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 00:43:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:57,287 INFO L225 Difference]: With dead ends: 28 [2022-10-16 00:43:57,287 INFO L226 Difference]: Without dead ends: 28 [2022-10-16 00:43:57,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:57,289 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:57,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:43:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-16 00:43:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-10-16 00:43:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 25 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) [2022-10-16 00:43:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-10-16 00:43:57,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 4 [2022-10-16 00:43:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:57,295 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-10-16 00:43:57,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-10-16 00:43:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 00:43:57,296 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:57,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:43:57,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 00:43:57,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:57,298 INFO L85 PathProgramCache]: Analyzing trace with hash 264435860, now seen corresponding path program 1 times [2022-10-16 00:43:57,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:57,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042581603] [2022-10-16 00:43:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:57,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:57,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042581603] [2022-10-16 00:43:57,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042581603] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:43:57,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529099858] [2022-10-16 00:43:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:57,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:43:57,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:43:57,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:43:57,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 00:43:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:57,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 00:43:57,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:43:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:57,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:43:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:57,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529099858] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:43:57,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:43:57,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-10-16 00:43:57,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310447932] [2022-10-16 00:43:57,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:43:57,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 00:43:57,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 00:43:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-16 00:43:57,516 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:57,585 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-10-16 00:43:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 00:43:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 00:43:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:57,588 INFO L225 Difference]: With dead ends: 58 [2022-10-16 00:43:57,588 INFO L226 Difference]: Without dead ends: 58 [2022-10-16 00:43:57,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-16 00:43:57,590 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:57,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 44 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:43:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-16 00:43:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-10-16 00:43:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-10-16 00:43:57,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 8 [2022-10-16 00:43:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:57,599 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-10-16 00:43:57,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-10-16 00:43:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 00:43:57,601 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:57,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 00:43:57,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 00:43:57,816 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 [2022-10-16 00:43:57,817 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:57,819 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-16 00:43:57,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584251085] [2022-10-16 00:43:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:57,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:58,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584251085] [2022-10-16 00:43:58,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584251085] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:43:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971259613] [2022-10-16 00:43:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:58,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:43:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:43:58,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:43:58,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 00:43:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 00:43:58,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:43:58,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 00:43:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:58,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:43:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:58,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971259613] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:43:58,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:43:58,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 00:43:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926925763] [2022-10-16 00:43:58,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:43:58,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 00:43:58,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 00:43:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 00:43:58,363 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:58,485 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-10-16 00:43:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 00:43:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 8 [2022-10-16 00:43:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:58,488 INFO L225 Difference]: With dead ends: 38 [2022-10-16 00:43:58,488 INFO L226 Difference]: Without dead ends: 38 [2022-10-16 00:43:58,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-16 00:43:58,493 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:58,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 47 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:43:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-16 00:43:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-16 00:43:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.21875) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-10-16 00:43:58,499 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 8 [2022-10-16 00:43:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:58,500 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-10-16 00:43:58,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-10-16 00:43:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 00:43:58,528 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:58,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2022-10-16 00:43:58,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 00:43:58,742 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 [2022-10-16 00:43:58,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457123, now seen corresponding path program 2 times [2022-10-16 00:43:58,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:58,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449420077] [2022-10-16 00:43:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:58,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-16 00:43:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:58,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449420077] [2022-10-16 00:43:58,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449420077] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:43:58,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:43:58,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:43:58,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054859656] [2022-10-16 00:43:58,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:43:58,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:43:58,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:43:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:58,952 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:58,986 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-10-16 00:43:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:43:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 20 [2022-10-16 00:43:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:58,992 INFO L225 Difference]: With dead ends: 37 [2022-10-16 00:43:58,993 INFO L226 Difference]: Without dead ends: 37 [2022-10-16 00:43:58,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:43:58,999 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:59,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:43:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-16 00:43:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-10-16 00:43:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.1875) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-10-16 00:43:59,017 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 20 [2022-10-16 00:43:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:59,018 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-10-16 00:43:59,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-10-16 00:43:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 00:43:59,019 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:59,019 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 00:43:59,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 00:43:59,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:59,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-16 00:43:59,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:59,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867411047] [2022-10-16 00:43:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:59,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:43:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:59,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:43:59,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867411047] [2022-10-16 00:43:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867411047] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:43:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275129014] [2022-10-16 00:43:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 00:43:59,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:43:59,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:43:59,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:43:59,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 00:43:59,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 00:43:59,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:43:59,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 00:43:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:43:59,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 00:43:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:43:59,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 00:43:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275129014] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:43:59,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 00:43:59,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-16 00:43:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253409093] [2022-10-16 00:43:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:43:59,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 00:43:59,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:43:59,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 00:43:59,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-16 00:43:59,609 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:59,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:43:59,688 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-10-16 00:43:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 00:43:59,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2022-10-16 00:43:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:43:59,689 INFO L225 Difference]: With dead ends: 44 [2022-10-16 00:43:59,690 INFO L226 Difference]: Without dead ends: 44 [2022-10-16 00:43:59,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-16 00:43:59,691 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:43:59,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:43:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-16 00:43:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2022-10-16 00:43:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-10-16 00:43:59,696 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 20 [2022-10-16 00:43:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:43:59,697 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-10-16 00:43:59,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:43:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-10-16 00:43:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-16 00:43:59,698 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:43:59,698 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-16 00:43:59,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 00:43:59,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:43:59,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:43:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:43:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1080372930, now seen corresponding path program 1 times [2022-10-16 00:43:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:43:59,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334180679] [2022-10-16 00:43:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:43:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:43:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-16 00:44:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334180679] [2022-10-16 00:44:00,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334180679] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:44:00,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:44:00,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 00:44:00,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562379840] [2022-10-16 00:44:00,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:44:00,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:44:00,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:00,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:44:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:44:00,034 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:00,058 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-10-16 00:44:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:44:00,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-16 00:44:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:00,059 INFO L225 Difference]: With dead ends: 40 [2022-10-16 00:44:00,059 INFO L226 Difference]: Without dead ends: 40 [2022-10-16 00:44:00,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:44:00,060 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:00,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:44:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-16 00:44:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-10-16 00:44:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.1290322580645162) 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) [2022-10-16 00:44:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-10-16 00:44:00,065 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 22 [2022-10-16 00:44:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:00,066 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-10-16 00:44:00,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-10-16 00:44:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 00:44:00,067 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:00,067 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:00,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 00:44:00,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1094926114, now seen corresponding path program 1 times [2022-10-16 00:44:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:00,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269536358] [2022-10-16 00:44:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:00,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269536358] [2022-10-16 00:44:00,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269536358] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:44:00,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67892543] [2022-10-16 00:44:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:00,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:00,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:44:00,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:44:00,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 00:44:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 00:44:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:44:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:00,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:44:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:00,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67892543] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:44:00,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:44:00,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-16 00:44:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664956763] [2022-10-16 00:44:00,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:44:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-16 00:44:00,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:00,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-16 00:44:00,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-16 00:44:00,422 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:00,493 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-10-16 00:44:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 00:44:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-16 00:44:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:00,501 INFO L225 Difference]: With dead ends: 77 [2022-10-16 00:44:00,501 INFO L226 Difference]: Without dead ends: 77 [2022-10-16 00:44:00,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-16 00:44:00,502 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:00,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 59 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:44:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-10-16 00:44:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2022-10-16 00:44:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-10-16 00:44:00,520 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 25 [2022-10-16 00:44:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:00,520 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-10-16 00:44:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-10-16 00:44:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-16 00:44:00,524 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:00,524 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:00,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 00:44:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:00,739 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 624277968, now seen corresponding path program 2 times [2022-10-16 00:44:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:00,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290490049] [2022-10-16 00:44:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:00,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:01,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:01,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290490049] [2022-10-16 00:44:01,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290490049] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:44:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956896162] [2022-10-16 00:44:01,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 00:44:01,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:01,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:44:01,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:44:01,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 00:44:01,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 00:44:01,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:44:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 00:44:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:44:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-16 00:44:01,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 00:44:01,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956896162] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:44:01,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 00:44:01,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2022-10-16 00:44:01,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601587727] [2022-10-16 00:44:01,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:44:01,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 00:44:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 00:44:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-10-16 00:44:01,248 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:01,277 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-10-16 00:44:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 00:44:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-10-16 00:44:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:01,280 INFO L225 Difference]: With dead ends: 72 [2022-10-16 00:44:01,280 INFO L226 Difference]: Without dead ends: 72 [2022-10-16 00:44:01,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-10-16 00:44:01,282 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:01,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 43 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:44:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-16 00:44:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-10-16 00:44:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-10-16 00:44:01,300 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 49 [2022-10-16 00:44:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:01,300 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-10-16 00:44:01,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-10-16 00:44:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-16 00:44:01,304 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:01,304 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:01,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 00:44:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-16 00:44:01,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:01,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1364347463, now seen corresponding path program 1 times [2022-10-16 00:44:01,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:01,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674488334] [2022-10-16 00:44:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:01,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-16 00:44:01,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:01,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674488334] [2022-10-16 00:44:01,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674488334] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:44:01,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:44:01,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 00:44:01,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361229466] [2022-10-16 00:44:01,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:44:01,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:44:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:44:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:44:01,655 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-10-16 00:44:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:01,703 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-10-16 00:44:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 00:44:01,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 51 [2022-10-16 00:44:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:01,708 INFO L225 Difference]: With dead ends: 65 [2022-10-16 00:44:01,708 INFO L226 Difference]: Without dead ends: 65 [2022-10-16 00:44:01,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:44:01,709 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:01,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:44:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-16 00:44:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-10-16 00:44:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-10-16 00:44:01,713 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 51 [2022-10-16 00:44:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:01,714 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-10-16 00:44:01,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-10-16 00:44:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-10-16 00:44:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-16 00:44:01,715 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:01,715 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:01,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 00:44:01,715 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash 654906655, now seen corresponding path program 1 times [2022-10-16 00:44:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289482511] [2022-10-16 00:44:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:01,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:01,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:01,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289482511] [2022-10-16 00:44:01,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289482511] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:44:01,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200341619] [2022-10-16 00:44:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:01,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:44:01,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:44:01,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 00:44:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 00:44:02,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:44:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:02,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:44:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:02,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200341619] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:44:02,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:44:02,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2022-10-16 00:44:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568827174] [2022-10-16 00:44:02,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:44:02,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 00:44:02,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:02,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 00:44:02,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-10-16 00:44:02,239 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:02,304 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-10-16 00:44:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 00:44:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-10-16 00:44:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:02,306 INFO L225 Difference]: With dead ends: 78 [2022-10-16 00:44:02,306 INFO L226 Difference]: Without dead ends: 78 [2022-10-16 00:44:02,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-10-16 00:44:02,307 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:02,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 92 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:44:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-10-16 00:44:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2022-10-16 00:44:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-10-16 00:44:02,311 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 52 [2022-10-16 00:44:02,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:02,311 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-10-16 00:44:02,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-10-16 00:44:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-16 00:44:02,313 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:02,313 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:02,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 00:44:02,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:02,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1545059234, now seen corresponding path program 2 times [2022-10-16 00:44:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:02,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252420884] [2022-10-16 00:44:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-16 00:44:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252420884] [2022-10-16 00:44:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252420884] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:44:02,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:44:02,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 00:44:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593679595] [2022-10-16 00:44:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:44:02,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:44:02,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:44:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:44:02,742 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:02,774 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-10-16 00:44:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:44:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-10-16 00:44:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:02,775 INFO L225 Difference]: With dead ends: 65 [2022-10-16 00:44:02,775 INFO L226 Difference]: Without dead ends: 61 [2022-10-16 00:44:02,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:44:02,776 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:02,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:44:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-16 00:44:02,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-10-16 00:44:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-10-16 00:44:02,783 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-10-16 00:44:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:02,784 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-10-16 00:44:02,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-10-16 00:44:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-16 00:44:02,789 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:02,789 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:02,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-16 00:44:02,790 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1546685600, now seen corresponding path program 1 times [2022-10-16 00:44:02,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:02,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804060466] [2022-10-16 00:44:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:02,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-16 00:44:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804060466] [2022-10-16 00:44:03,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804060466] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:44:03,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752515709] [2022-10-16 00:44:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:44:03,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:44:03,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 00:44:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-16 00:44:03,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:44:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 200 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:03,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:44:03,687 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 23 treesize of output 19 [2022-10-16 00:44:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 200 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:44:04,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752515709] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:44:04,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:44:04,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 16] total 35 [2022-10-16 00:44:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989456145] [2022-10-16 00:44:04,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:44:04,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-10-16 00:44:04,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-10-16 00:44:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 00:44:04,139 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:04,725 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2022-10-16 00:44:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 00:44:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 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 56 [2022-10-16 00:44:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:04,727 INFO L225 Difference]: With dead ends: 89 [2022-10-16 00:44:04,727 INFO L226 Difference]: Without dead ends: 89 [2022-10-16 00:44:04,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=711, Invalid=2045, Unknown=0, NotChecked=0, Total=2756 [2022-10-16 00:44:04,730 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:04,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 182 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 00:44:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-16 00:44:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2022-10-16 00:44:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2022-10-16 00:44:04,733 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 56 [2022-10-16 00:44:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:04,733 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2022-10-16 00:44:04,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2022-10-16 00:44:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-16 00:44:04,734 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:04,735 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:04,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 00:44:04,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:04,947 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash 306123913, now seen corresponding path program 1 times [2022-10-16 00:44:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437419777] [2022-10-16 00:44:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:04,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-16 00:44:05,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:44:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437419777] [2022-10-16 00:44:05,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437419777] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:44:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347708052] [2022-10-16 00:44:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:05,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:44:05,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:44:05,287 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:44:05,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 00:44:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:44:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-16 00:44:05,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:44:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-16 00:44:43,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:44:59,580 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 37 DAG size of output: 14 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 00:44:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-16 00:44:59,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347708052] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:44:59,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:44:59,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-10-16 00:44:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361568620] [2022-10-16 00:44:59,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:44:59,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 00:44:59,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:44:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 00:44:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-16 00:44:59,601 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:44:59,694 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-10-16 00:44:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 00:44:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-10-16 00:44:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:44:59,695 INFO L225 Difference]: With dead ends: 77 [2022-10-16 00:44:59,696 INFO L226 Difference]: Without dead ends: 73 [2022-10-16 00:44:59,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-10-16 00:44:59,697 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:44:59,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 56 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:44:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-16 00:44:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-16 00:44:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-10-16 00:44:59,700 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 58 [2022-10-16 00:44:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:44:59,700 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-10-16 00:44:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:44:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-10-16 00:44:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-16 00:44:59,701 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:44:59,701 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:44:59,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 00:44:59,912 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,SelfDestructingSolverStorable15 [2022-10-16 00:44:59,913 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-16 00:44:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:44:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash 135758185, now seen corresponding path program 2 times [2022-10-16 00:44:59,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:44:59,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285211383] [2022-10-16 00:44:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:44:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:44:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:45:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-16 00:45:00,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:45:00,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285211383] [2022-10-16 00:45:00,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285211383] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:45:00,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104180489] [2022-10-16 00:45:00,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 00:45:00,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:45:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:45:00,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:45:00,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 00:45:01,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 00:45:01,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:45:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-16 00:45:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:45:26,898 WARN L833 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main_~i~0#1|) (< |c_ULTIMATE.start_main_~i~0#1| 4294967296) (exists ((|aux_div_v_ULTIMATE.start_main_~i~0#1_86_68| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_272| Int) (|aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153| Int) (|aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~c~0#1_38_49| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_272_186| Int) (|aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60| Int) (|aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71| Int)) (let ((.cse12 (* |aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60| 256)) (.cse14 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_272| 4294967296)) (.cse4 (* 4294967286 |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153|)) (.cse6 (* 4294964736 |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153|)) (.cse13 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_272_186| 4294967296))) (let ((.cse0 (* |aux_div_v_ULTIMATE.start_main_~i~0#1_86_68| 256)) (.cse2 (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133|)) (.cse8 (+ .cse13 |c_ULTIMATE.start_main_~i~0#1|)) (.cse7 (+ .cse4 4294967494 .cse6)) (.cse11 (+ .cse12 .cse13 .cse14 |c_ULTIMATE.start_main_~i~0#1| (* 256 |aux_div_aux_mod_ULTIMATE.start_main_~c~0#1_38_49|))) (.cse5 (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71| 256)) (.cse3 (+ .cse13 .cse14 |c_ULTIMATE.start_main_~i~0#1|)) (.cse1 (+ (* 256 |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153|) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153|)) (.cse9 (+ .cse4 4294967238 .cse6)) (.cse10 (+ .cse12 .cse13 .cse14 |c_ULTIMATE.start_main_~i~0#1|))) (and (<= (+ .cse0 246) .cse1) (< .cse1 (+ .cse2 8589934640)) (< .cse1 (+ .cse0 304)) (< .cse3 (+ .cse4 .cse5 4294967494 .cse6)) (< .cse3 .cse7) (<= .cse5 .cse8) (<= .cse9 .cse3) (<= (+ .cse2 8589934384) .cse1) (<= .cse8 (+ 2147483647 .cse5)) (<= .cse10 (+ .cse4 4294967295 .cse6)) (<= .cse1 8589934591) (< .cse11 .cse7) (<= (+ .cse4 4294967286 .cse6) .cse11) (<= 48 |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153|) (< |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0#1_86_68_133_153| 256) (<= (+ .cse4 .cse5 4294967238 .cse6) .cse3) (< 4294967295 .cse1) (<= .cse9 .cse10)))))) is different from false [2022-10-16 00:47:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 231 trivial. 7 not checked. [2022-10-16 00:47:49,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:48:07,037 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)