/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/reducercommutativity/max20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 02:19:15,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 02:19:15,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 02:19:15,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 02:19:15,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 02:19:15,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 02:19:15,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 02:19:15,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 02:19:15,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 02:19:15,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 02:19:15,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 02:19:15,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 02:19:15,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 02:19:15,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 02:19:15,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 02:19:15,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 02:19:15,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 02:19:15,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 02:19:15,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 02:19:15,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 02:19:15,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 02:19:15,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 02:19:15,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 02:19:15,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 02:19:15,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-16 02:19:15,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-16 02:19:15,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-16 02:19:15,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-16 02:19:15,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-16 02:19:15,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-16 02:19:15,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 02:19:15,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 02:19:15,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 02:19:15,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 02:19:15,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 02:19:15,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 02:19:15,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 02:19:15,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 02:19:15,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 02:19:15,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 02:19:15,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 02:19:15,197 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 02:19:15,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 02:19:15,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 02:19:15,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 02:19:15,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 02:19:15,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 02:19:15,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 02:19:15,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 02:19:15,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 02:19:15,248 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 02:19:15,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 02:19:15,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 02:19:15,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 02:19:15,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 02:19:15,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 02:19:15,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 02:19:15,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 02:19:15,251 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 02:19:15,251 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 02:19:15,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 02:19:15,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 02:19:15,252 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 02:19:15,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 02:19:15,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 02:19:15,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 02:19:15,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 02:19:15,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:19:15,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 02:19:15,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 02:19:15,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 02:19:15,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 02:19:15,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 02:19:15,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 02:19:15,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 02:19:15,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 02:19:15,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 02:19:15,760 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 02:19:15,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max20-1.i [2022-10-16 02:19:15,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae167c78/d8d1d7298f1143d9af29786492b981b6/FLAGc0a3a9959 [2022-10-16 02:19:16,479 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 02:19:16,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max20-1.i [2022-10-16 02:19:16,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae167c78/d8d1d7298f1143d9af29786492b981b6/FLAGc0a3a9959 [2022-10-16 02:19:16,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae167c78/d8d1d7298f1143d9af29786492b981b6 [2022-10-16 02:19:16,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 02:19:16,857 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 02:19:16,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 02:19:16,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 02:19:16,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 02:19:16,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:16" (1/1) ... [2022-10-16 02:19:16,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec181b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:16, skipping insertion in model container [2022-10-16 02:19:16,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:16" (1/1) ... [2022-10-16 02:19:16,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 02:19:16,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 02:19:17,051 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/reducercommutativity/max20-1.i[1290,1303] [2022-10-16 02:19:17,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:19:17,063 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 02:19:17,088 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/reducercommutativity/max20-1.i[1290,1303] [2022-10-16 02:19:17,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:19:17,107 INFO L208 MainTranslator]: Completed translation [2022-10-16 02:19:17,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17 WrapperNode [2022-10-16 02:19:17,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 02:19:17,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 02:19:17,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 02:19:17,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 02:19:17,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,172 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-10-16 02:19:17,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 02:19:17,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 02:19:17,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 02:19:17,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 02:19:17,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 02:19:17,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 02:19:17,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 02:19:17,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 02:19:17,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (1/1) ... [2022-10-16 02:19:17,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:19:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:17,254 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 02:19:17,265 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 02:19:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 02:19:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-10-16 02:19:17,319 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-10-16 02:19:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 02:19:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 02:19:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 02:19:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 02:19:17,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 02:19:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 02:19:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 02:19:17,432 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 02:19:17,434 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 02:19:17,796 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 02:19:17,811 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 02:19:17,811 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 02:19:17,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:17 BoogieIcfgContainer [2022-10-16 02:19:17,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 02:19:17,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 02:19:17,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 02:19:17,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 02:19:17,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:19:16" (1/3) ... [2022-10-16 02:19:17,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a62fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:17, skipping insertion in model container [2022-10-16 02:19:17,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:17" (2/3) ... [2022-10-16 02:19:17,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a62fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:17, skipping insertion in model container [2022-10-16 02:19:17,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:17" (3/3) ... [2022-10-16 02:19:17,830 INFO L112 eAbstractionObserver]: Analyzing ICFG max20-1.i [2022-10-16 02:19:17,908 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 02:19:17,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-10-16 02:19:17,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 02:19:18,006 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;@368383b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 02:19:18,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-10-16 02:19:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:19:18,020 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:18,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:19:18,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1849285, now seen corresponding path program 1 times [2022-10-16 02:19:18,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:18,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9348384] [2022-10-16 02:19:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:18,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:18,380 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 02:19:18,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:18,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9348384] [2022-10-16 02:19:18,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9348384] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:18,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:18,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:19:18,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574877594] [2022-10-16 02:19:18,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:18,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:19:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:19:18,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:19:18,430 INFO L87 Difference]: Start difference. First operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 02:19:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:18,525 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-10-16 02:19:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:19:18,528 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 02:19:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:18,537 INFO L225 Difference]: With dead ends: 58 [2022-10-16 02:19:18,537 INFO L226 Difference]: Without dead ends: 56 [2022-10-16 02:19:18,539 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 02:19:18,543 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:18,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-16 02:19:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-16 02:19:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-10-16 02:19:18,589 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 4 [2022-10-16 02:19:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:18,590 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-10-16 02:19:18,590 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 02:19:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-10-16 02:19:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:19:18,591 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:18,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:19:18,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 02:19:18,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1849286, now seen corresponding path program 1 times [2022-10-16 02:19:18,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:18,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117487213] [2022-10-16 02:19:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:18,706 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 02:19:18,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117487213] [2022-10-16 02:19:18,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117487213] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:18,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:18,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:19:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49531112] [2022-10-16 02:19:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:18,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:19:18,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:19:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:19:18,711 INFO L87 Difference]: Start difference. First operand 56 states and 61 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 02:19:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:18,769 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-16 02:19:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:19:18,770 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 02:19:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:18,772 INFO L225 Difference]: With dead ends: 60 [2022-10-16 02:19:18,772 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 02:19:18,772 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 02:19:18,774 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:18,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 02:19:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-10-16 02:19:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-10-16 02:19:18,785 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 4 [2022-10-16 02:19:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:18,786 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-10-16 02:19:18,786 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 02:19:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-10-16 02:19:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 02:19:18,787 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:18,787 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:18,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 02:19:18,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1543018551, now seen corresponding path program 1 times [2022-10-16 02:19:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:18,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307702785] [2022-10-16 02:19:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:18,964 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 02:19:18,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:18,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307702785] [2022-10-16 02:19:18,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307702785] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:18,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128763772] [2022-10-16 02:19:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:18,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:18,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:18,968 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 02:19:18,989 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 02:19:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:19,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 02:19:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:19,126 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 02:19:19,247 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 02:19:19,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:19,357 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 02:19:19,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128763772] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:19,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:19,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 02:19:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175527050] [2022-10-16 02:19:19,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:19:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:19:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 02:19:19,366 INFO L87 Difference]: Start difference. First operand 58 states and 63 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 02:19:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:19,657 INFO L93 Difference]: Finished difference Result 134 states and 149 transitions. [2022-10-16 02:19:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 02:19:19,658 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 02:19:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:19,661 INFO L225 Difference]: With dead ends: 134 [2022-10-16 02:19:19,661 INFO L226 Difference]: Without dead ends: 134 [2022-10-16 02:19:19,662 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 02:19:19,663 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:19,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 164 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 02:19:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-10-16 02:19:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 70. [2022-10-16 02:19:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.392156862745098) internal successors, (71), 65 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-10-16 02:19:19,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 8 [2022-10-16 02:19:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:19,679 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-10-16 02:19:19,680 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 02:19:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-10-16 02:19:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 02:19:19,681 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:19,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:19,718 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 02:19:19,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:19,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash -678742767, now seen corresponding path program 1 times [2022-10-16 02:19:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:19,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190672389] [2022-10-16 02:19:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 02:19:20,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:20,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190672389] [2022-10-16 02:19:20,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190672389] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:20,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:20,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:19:20,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063760288] [2022-10-16 02:19:20,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:20,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:19:20,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:20,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:19:20,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:19:20,022 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:20,119 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-10-16 02:19:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:19:20,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-16 02:19:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:20,121 INFO L225 Difference]: With dead ends: 68 [2022-10-16 02:19:20,121 INFO L226 Difference]: Without dead ends: 68 [2022-10-16 02:19:20,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 02:19:20,123 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:20,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 75 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-16 02:19:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-10-16 02:19:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 63 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-10-16 02:19:20,132 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 15 [2022-10-16 02:19:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:20,133 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-10-16 02:19:20,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-10-16 02:19:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 02:19:20,134 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:20,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:20,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 02:19:20,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash -678742766, now seen corresponding path program 1 times [2022-10-16 02:19:20,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:20,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612260080] [2022-10-16 02:19:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:20,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:20,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:20,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612260080] [2022-10-16 02:19:20,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612260080] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164659340] [2022-10-16 02:19:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:20,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:20,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:20,244 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 02:19:20,253 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 02:19:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:20,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 02:19:20,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:20,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:20,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164659340] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:20,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:20,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 02:19:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030721001] [2022-10-16 02:19:20,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:20,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 02:19:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:20,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 02:19:20,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:20,427 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:20,481 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-10-16 02:19:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 02:19:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-16 02:19:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:20,484 INFO L225 Difference]: With dead ends: 76 [2022-10-16 02:19:20,485 INFO L226 Difference]: Without dead ends: 76 [2022-10-16 02:19:20,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:20,489 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 20 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:20,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 269 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-16 02:19:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-10-16 02:19:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.293103448275862) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-10-16 02:19:20,507 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 15 [2022-10-16 02:19:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:20,507 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-10-16 02:19:20,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-10-16 02:19:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 02:19:20,510 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:20,510 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 02:19:20,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-16 02:19:20,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:20,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:20,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1850106158, now seen corresponding path program 2 times [2022-10-16 02:19:20,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:20,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908080509] [2022-10-16 02:19:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:20,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:20,983 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 02:19:20,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908080509] [2022-10-16 02:19:20,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908080509] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686425704] [2022-10-16 02:19:20,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:19:20,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:20,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:20,985 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 02:19:20,992 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 02:19:21,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:19:21,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:21,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 02:19:21,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:21,055 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 02:19:21,227 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 02:19:21,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:19:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686425704] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:21,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:19:21,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-16 02:19:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103681137] [2022-10-16 02:19:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 02:19:21,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:21,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 02:19:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-16 02:19:21,230 INFO L87 Difference]: Start difference. First operand 75 states and 81 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 02:19:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:21,319 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-10-16 02:19:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 02:19:21,320 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 02:19:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:21,321 INFO L225 Difference]: With dead ends: 68 [2022-10-16 02:19:21,321 INFO L226 Difference]: Without dead ends: 68 [2022-10-16 02:19:21,321 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 02:19:21,323 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:21,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 94 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-16 02:19:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-10-16 02:19:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-10-16 02:19:21,330 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 20 [2022-10-16 02:19:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:21,330 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-10-16 02:19:21,330 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 02:19:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-10-16 02:19:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 02:19:21,332 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:21,332 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:21,368 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 02:19:21,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:21,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:21,548 INFO L85 PathProgramCache]: Analyzing trace with hash -408211834, now seen corresponding path program 2 times [2022-10-16 02:19:21,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:21,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6362965] [2022-10-16 02:19:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:21,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:21,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:21,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6362965] [2022-10-16 02:19:21,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6362965] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:21,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746385367] [2022-10-16 02:19:21,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:19:21,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:21,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:21,701 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 02:19:21,722 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 02:19:21,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 02:19:21,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:21,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 02:19:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:21,769 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 02:19:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 02:19:21,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:19:21,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746385367] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:21,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:19:21,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-10-16 02:19:21,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753978715] [2022-10-16 02:19:21,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:21,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:19:21,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:19:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-10-16 02:19:21,903 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:21,984 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-10-16 02:19:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:19:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 02:19:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:21,985 INFO L225 Difference]: With dead ends: 75 [2022-10-16 02:19:21,986 INFO L226 Difference]: Without dead ends: 75 [2022-10-16 02:19:21,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-10-16 02:19:21,987 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:21,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-16 02:19:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-10-16 02:19:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-10-16 02:19:21,994 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 31 [2022-10-16 02:19:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:21,994 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-10-16 02:19:21,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-10-16 02:19:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-16 02:19:21,996 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:21,996 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:22,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-10-16 02:19:22,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:22,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1937410731, now seen corresponding path program 1 times [2022-10-16 02:19:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:22,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208262440] [2022-10-16 02:19:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:22,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:22,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:22,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208262440] [2022-10-16 02:19:22,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208262440] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:22,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503332172] [2022-10-16 02:19:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:22,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:22,349 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 02:19:22,370 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 02:19:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 02:19:22,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:22,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:22,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503332172] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:22,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:22,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 02:19:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099971808] [2022-10-16 02:19:22,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 02:19:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 02:19:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:19:22,579 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:22,644 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-10-16 02:19:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 02:19:22,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-16 02:19:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:22,645 INFO L225 Difference]: With dead ends: 104 [2022-10-16 02:19:22,646 INFO L226 Difference]: Without dead ends: 104 [2022-10-16 02:19:22,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:19:22,647 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:22,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 109 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-10-16 02:19:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-10-16 02:19:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 99 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2022-10-16 02:19:22,654 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 36 [2022-10-16 02:19:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:22,655 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2022-10-16 02:19:22,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2022-10-16 02:19:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-16 02:19:22,657 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:22,657 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:22,696 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 02:19:22,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:22,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2011843437, now seen corresponding path program 2 times [2022-10-16 02:19:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:22,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630761960] [2022-10-16 02:19:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:23,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:23,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630761960] [2022-10-16 02:19:23,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630761960] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:23,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463157168] [2022-10-16 02:19:23,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:19:23,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:23,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:23,340 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 02:19:23,347 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 02:19:23,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:19:23,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:23,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 02:19:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:23,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:23,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463157168] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:23,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:23,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-10-16 02:19:23,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114075712] [2022-10-16 02:19:23,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:23,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-16 02:19:23,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:23,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-16 02:19:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-10-16 02:19:23,801 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:23,893 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-10-16 02:19:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 02:19:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-10-16 02:19:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:23,895 INFO L225 Difference]: With dead ends: 128 [2022-10-16 02:19:23,895 INFO L226 Difference]: Without dead ends: 128 [2022-10-16 02:19:23,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-10-16 02:19:23,897 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:23,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 345 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-10-16 02:19:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-10-16 02:19:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 123 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2022-10-16 02:19:23,905 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 68 [2022-10-16 02:19:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:23,905 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2022-10-16 02:19:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2022-10-16 02:19:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-16 02:19:23,909 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:23,909 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:23,945 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 02:19:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:24,124 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1811479807, now seen corresponding path program 3 times [2022-10-16 02:19:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:24,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907019245] [2022-10-16 02:19:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:24,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-16 02:19:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:24,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907019245] [2022-10-16 02:19:24,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907019245] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809379069] [2022-10-16 02:19:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 02:19:24,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:24,680 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 02:19:24,701 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 02:19:24,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 02:19:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 02:19:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:24,766 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 02:19:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-16 02:19:25,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:19:25,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809379069] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:25,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:19:25,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2022-10-16 02:19:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361968387] [2022-10-16 02:19:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:19:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:19:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:25,149 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:25,271 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2022-10-16 02:19:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:19:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-10-16 02:19:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:25,273 INFO L225 Difference]: With dead ends: 129 [2022-10-16 02:19:25,273 INFO L226 Difference]: Without dead ends: 129 [2022-10-16 02:19:25,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-10-16 02:19:25,274 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 53 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:25,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 104 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-10-16 02:19:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2022-10-16 02:19:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0608695652173914) internal successors, (122), 118 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2022-10-16 02:19:25,281 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 92 [2022-10-16 02:19:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:25,282 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2022-10-16 02:19:25,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2022-10-16 02:19:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-10-16 02:19:25,285 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:25,286 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:25,327 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 02:19:25,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:25,500 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2001348720, now seen corresponding path program 1 times [2022-10-16 02:19:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:25,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5412584] [2022-10-16 02:19:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:25,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:25,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-10-16 02:19:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-10-16 02:19:25,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:25,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5412584] [2022-10-16 02:19:25,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5412584] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:25,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736705919] [2022-10-16 02:19:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:25,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:25,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:25,687 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 02:19:25,692 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 02:19:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:25,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 02:19:25,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-10-16 02:19:25,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-10-16 02:19:25,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736705919] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:25,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:25,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-10-16 02:19:25,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614061741] [2022-10-16 02:19:25,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:25,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 02:19:25,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 02:19:25,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-16 02:19:25,868 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:19:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:25,892 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2022-10-16 02:19:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 02:19:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-10-16 02:19:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:25,894 INFO L225 Difference]: With dead ends: 144 [2022-10-16 02:19:25,894 INFO L226 Difference]: Without dead ends: 144 [2022-10-16 02:19:25,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-16 02:19:25,895 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 31 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:25,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 178 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-10-16 02:19:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-10-16 02:19:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 136 states have (on average 1.0735294117647058) internal successors, (146), 139 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-10-16 02:19:25,901 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 117 [2022-10-16 02:19:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:25,901 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-10-16 02:19:25,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:19:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-10-16 02:19:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-10-16 02:19:25,904 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:25,904 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:25,931 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 02:19:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-16 02:19:26,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:26,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2058935542, now seen corresponding path program 2 times [2022-10-16 02:19:26,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:26,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231168031] [2022-10-16 02:19:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:26,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:26,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:26,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-10-16 02:19:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 941 trivial. 0 not checked. [2022-10-16 02:19:26,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:26,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231168031] [2022-10-16 02:19:26,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231168031] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:26,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:26,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:19:26,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847886568] [2022-10-16 02:19:26,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:26,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:19:26,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:26,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:19:26,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:19:26,450 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 02:19:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:26,493 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2022-10-16 02:19:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 02:19:26,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 147 [2022-10-16 02:19:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:26,496 INFO L225 Difference]: With dead ends: 149 [2022-10-16 02:19:26,496 INFO L226 Difference]: Without dead ends: 149 [2022-10-16 02:19:26,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:19:26,497 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:26,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 63 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-10-16 02:19:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-10-16 02:19:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 142 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2022-10-16 02:19:26,502 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 147 [2022-10-16 02:19:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:26,503 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2022-10-16 02:19:26,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 02:19:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2022-10-16 02:19:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-10-16 02:19:26,505 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:26,506 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:26,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 02:19:26,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2021054844, now seen corresponding path program 1 times [2022-10-16 02:19:26,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:26,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334445415] [2022-10-16 02:19:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:26,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:26,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:26,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-10-16 02:19:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 941 trivial. 0 not checked. [2022-10-16 02:19:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334445415] [2022-10-16 02:19:26,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334445415] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506674319] [2022-10-16 02:19:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:26,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:26,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:26,999 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 02:19:27,013 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 02:19:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:27,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 02:19:27,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2022-10-16 02:19:27,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2022-10-16 02:19:27,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506674319] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:27,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:27,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-10-16 02:19:27,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615855231] [2022-10-16 02:19:27,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:27,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 02:19:27,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:27,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 02:19:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-16 02:19:27,327 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 02:19:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:27,513 INFO L93 Difference]: Finished difference Result 190 states and 204 transitions. [2022-10-16 02:19:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 02:19:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 152 [2022-10-16 02:19:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:27,515 INFO L225 Difference]: With dead ends: 190 [2022-10-16 02:19:27,515 INFO L226 Difference]: Without dead ends: 190 [2022-10-16 02:19:27,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-16 02:19:27,517 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 107 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:27,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 236 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 02:19:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-16 02:19:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-10-16 02:19:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.076086956521739) internal successors, (198), 185 states have internal predecessors, (198), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 204 transitions. [2022-10-16 02:19:27,523 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 204 transitions. Word has length 152 [2022-10-16 02:19:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:27,523 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 204 transitions. [2022-10-16 02:19:27,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 02:19:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 204 transitions. [2022-10-16 02:19:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-10-16 02:19:27,527 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:27,527 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 20, 20, 20, 20, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:27,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:27,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 02:19:27,740 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1822740357, now seen corresponding path program 1 times [2022-10-16 02:19:27,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:27,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117760373] [2022-10-16 02:19:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:28,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:28,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-10-16 02:19:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:28,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-10-16 02:19:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3067 backedges. 0 proven. 1283 refuted. 0 times theorem prover too weak. 1784 trivial. 0 not checked. [2022-10-16 02:19:28,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117760373] [2022-10-16 02:19:28,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117760373] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418364047] [2022-10-16 02:19:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:28,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:28,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:28,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:28,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 02:19:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:28,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 02:19:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3067 backedges. 1044 proven. 235 refuted. 0 times theorem prover too weak. 1788 trivial. 0 not checked. [2022-10-16 02:19:28,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3067 backedges. 0 proven. 1283 refuted. 0 times theorem prover too weak. 1784 trivial. 0 not checked. [2022-10-16 02:19:29,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418364047] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:29,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-10-16 02:19:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452811336] [2022-10-16 02:19:29,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-16 02:19:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-16 02:19:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-16 02:19:29,113 INFO L87 Difference]: Start difference. First operand 190 states and 204 transitions. Second operand has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:19:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:29,225 INFO L93 Difference]: Finished difference Result 260 states and 284 transitions. [2022-10-16 02:19:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 02:19:29,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 276 [2022-10-16 02:19:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:29,228 INFO L225 Difference]: With dead ends: 260 [2022-10-16 02:19:29,228 INFO L226 Difference]: Without dead ends: 260 [2022-10-16 02:19:29,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 547 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-16 02:19:29,230 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 230 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:29,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 272 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-10-16 02:19:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-10-16 02:19:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.094488188976378) internal successors, (278), 255 states have internal predecessors, (278), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 284 transitions. [2022-10-16 02:19:29,238 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 284 transitions. Word has length 276 [2022-10-16 02:19:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:29,238 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 284 transitions. [2022-10-16 02:19:29,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:19:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 284 transitions. [2022-10-16 02:19:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-10-16 02:19:29,246 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:29,246 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 60, 20, 20, 20, 20, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:29,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:29,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-16 02:19:29,461 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash 841114085, now seen corresponding path program 2 times [2022-10-16 02:19:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:29,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116641780] [2022-10-16 02:19:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:29,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:29,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:19:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:30,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 317 [2022-10-16 02:19:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9825 trivial. 0 not checked. [2022-10-16 02:19:30,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:30,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116641780] [2022-10-16 02:19:30,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116641780] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:30,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532578721] [2022-10-16 02:19:30,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:19:30,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:30,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:30,084 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:30,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 02:19:30,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:19:30,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:30,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 02:19:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 4090 proven. 7 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-16 02:19:30,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9825 trivial. 0 not checked. [2022-10-16 02:19:30,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532578721] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:30,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:30,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 02:19:30,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060037732] [2022-10-16 02:19:30,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:30,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 02:19:30,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 02:19:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:30,493 INFO L87 Difference]: Start difference. First operand 260 states and 284 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:30,534 INFO L93 Difference]: Finished difference Result 280 states and 304 transitions. [2022-10-16 02:19:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 02:19:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 426 [2022-10-16 02:19:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:30,538 INFO L225 Difference]: With dead ends: 280 [2022-10-16 02:19:30,538 INFO L226 Difference]: Without dead ends: 280 [2022-10-16 02:19:30,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:30,541 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:30,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 209 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-16 02:19:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-10-16 02:19:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0875912408759123) internal successors, (298), 275 states have internal predecessors, (298), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 304 transitions. [2022-10-16 02:19:30,553 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 304 transitions. Word has length 426 [2022-10-16 02:19:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:30,554 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 304 transitions. [2022-10-16 02:19:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 304 transitions. [2022-10-16 02:19:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-10-16 02:19:30,564 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:30,564 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 60, 20, 20, 20, 20, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:30,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:30,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 02:19:30,779 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:30,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2055147621, now seen corresponding path program 3 times [2022-10-16 02:19:30,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:30,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163354018] [2022-10-16 02:19:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:30,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:31,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:31,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:19:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:31,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2022-10-16 02:19:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 9825 trivial. 0 not checked. [2022-10-16 02:19:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:31,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163354018] [2022-10-16 02:19:31,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163354018] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:31,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018589817] [2022-10-16 02:19:31,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 02:19:31,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:31,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:31,561 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:31,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 02:19:32,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-10-16 02:19:32,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 02:19:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 4090 proven. 81 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-16 02:19:32,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 9825 trivial. 0 not checked. [2022-10-16 02:19:32,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018589817] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:32,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:32,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 02:19:32,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187978949] [2022-10-16 02:19:32,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:32,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 02:19:32,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 02:19:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:19:32,318 INFO L87 Difference]: Start difference. First operand 280 states and 304 transitions. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:32,393 INFO L93 Difference]: Finished difference Result 320 states and 344 transitions. [2022-10-16 02:19:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 02:19:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 446 [2022-10-16 02:19:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:32,396 INFO L225 Difference]: With dead ends: 320 [2022-10-16 02:19:32,397 INFO L226 Difference]: Without dead ends: 320 [2022-10-16 02:19:32,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:19:32,398 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 84 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:32,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 257 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-10-16 02:19:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-10-16 02:19:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.0764331210191083) internal successors, (338), 315 states have internal predecessors, (338), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 344 transitions. [2022-10-16 02:19:32,409 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 344 transitions. Word has length 446 [2022-10-16 02:19:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:32,410 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 344 transitions. [2022-10-16 02:19:32,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 344 transitions. [2022-10-16 02:19:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-10-16 02:19:32,419 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:32,420 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 60, 20, 20, 20, 20, 14, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:32,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:32,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 02:19:32,636 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash 702524773, now seen corresponding path program 4 times [2022-10-16 02:19:32,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:32,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966415758] [2022-10-16 02:19:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:32,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:33,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:33,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:19:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:33,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 377 [2022-10-16 02:19:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10294 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 9825 trivial. 0 not checked. [2022-10-16 02:19:33,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966415758] [2022-10-16 02:19:33,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966415758] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654504290] [2022-10-16 02:19:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 02:19:33,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:33,841 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:33,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 02:19:35,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 02:19:35,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 02:19:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10294 backedges. 4090 proven. 469 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-16 02:19:36,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10294 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 9825 trivial. 0 not checked. [2022-10-16 02:19:36,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654504290] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:36,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:36,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-10-16 02:19:36,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541829450] [2022-10-16 02:19:36,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:36,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-16 02:19:36,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:36,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-16 02:19:36,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-16 02:19:36,356 INFO L87 Difference]: Start difference. First operand 320 states and 344 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:36,449 INFO L93 Difference]: Finished difference Result 345 states and 369 transitions. [2022-10-16 02:19:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-16 02:19:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 486 [2022-10-16 02:19:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:36,452 INFO L225 Difference]: With dead ends: 345 [2022-10-16 02:19:36,452 INFO L226 Difference]: Without dead ends: 345 [2022-10-16 02:19:36,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 962 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-16 02:19:36,454 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 76 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:36,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 183 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-10-16 02:19:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-10-16 02:19:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 339 states have (on average 1.0707964601769913) internal successors, (363), 340 states have internal predecessors, (363), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 369 transitions. [2022-10-16 02:19:36,463 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 369 transitions. Word has length 486 [2022-10-16 02:19:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:36,464 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 369 transitions. [2022-10-16 02:19:36,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 369 transitions. [2022-10-16 02:19:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-10-16 02:19:36,476 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:36,477 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 60, 20, 20, 20, 20, 19, 19, 19, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:36,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:36,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 02:19:36,692 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1741252247, now seen corresponding path program 5 times [2022-10-16 02:19:36,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:36,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034921057] [2022-10-16 02:19:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:36,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:45,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:46,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:19:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:47,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2022-10-16 02:19:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10699 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10699 trivial. 0 not checked. [2022-10-16 02:19:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:48,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034921057] [2022-10-16 02:19:48,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034921057] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:48,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:48,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-16 02:19:48,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140556098] [2022-10-16 02:19:48,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:48,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 02:19:48,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 02:19:48,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-10-16 02:19:48,243 INFO L87 Difference]: Start difference. First operand 345 states and 369 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:48,350 INFO L93 Difference]: Finished difference Result 726 states and 779 transitions. [2022-10-16 02:19:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 02:19:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 511 [2022-10-16 02:19:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:48,357 INFO L225 Difference]: With dead ends: 726 [2022-10-16 02:19:48,357 INFO L226 Difference]: Without dead ends: 726 [2022-10-16 02:19:48,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-10-16 02:19:48,359 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 48 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:48,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 361 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-10-16 02:19:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 557. [2022-10-16 02:19:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 548 states have (on average 1.082116788321168) internal successors, (593), 549 states have internal predecessors, (593), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-10-16 02:19:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 608 transitions. [2022-10-16 02:19:48,380 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 608 transitions. Word has length 511 [2022-10-16 02:19:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:48,381 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 608 transitions. [2022-10-16 02:19:48,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 608 transitions. [2022-10-16 02:19:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-10-16 02:19:48,387 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:48,388 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 60, 20, 20, 20, 20, 19, 19, 19, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:48,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-16 02:19:48,388 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1855751085, now seen corresponding path program 1 times [2022-10-16 02:19:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:48,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344727286] [2022-10-16 02:19:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:48,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:19:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:19:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2022-10-16 02:19:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10699 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10699 trivial. 0 not checked. [2022-10-16 02:19:49,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344727286] [2022-10-16 02:19:49,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344727286] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:49,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:49,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 02:19:49,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507201468] [2022-10-16 02:19:49,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:49,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 02:19:49,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 02:19:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 02:19:49,335 INFO L87 Difference]: Start difference. First operand 557 states and 608 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 02:19:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:49,368 INFO L93 Difference]: Finished difference Result 556 states and 607 transitions. [2022-10-16 02:19:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 02:19:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 512 [2022-10-16 02:19:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:49,373 INFO L225 Difference]: With dead ends: 556 [2022-10-16 02:19:49,373 INFO L226 Difference]: Without dead ends: 552 [2022-10-16 02:19:49,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 02:19:49,374 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:49,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-10-16 02:19:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-10-16 02:19:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 544 states have (on average 1.0808823529411764) internal successors, (588), 545 states have internal predecessors, (588), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 02:19:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 602 transitions. [2022-10-16 02:19:49,394 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 602 transitions. Word has length 512 [2022-10-16 02:19:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:49,396 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 602 transitions. [2022-10-16 02:19:49,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 02:19:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 602 transitions. [2022-10-16 02:19:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-10-16 02:19:49,402 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:49,402 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 59, 20, 20, 20, 20, 19, 19, 19, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:49,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-16 02:19:49,403 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash -321185062, now seen corresponding path program 1 times [2022-10-16 02:19:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:49,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775951447] [2022-10-16 02:19:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:20:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:00,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:20:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2022-10-16 02:20:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10699 backedges. 2044 proven. 6968 refuted. 0 times theorem prover too weak. 1687 trivial. 0 not checked. [2022-10-16 02:20:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775951447] [2022-10-16 02:20:05,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775951447] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103355906] [2022-10-16 02:20:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:05,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:05,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:05,916 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:05,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-16 02:20:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:06,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 110 conjunts are in the unsatisfiable core [2022-10-16 02:20:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:06,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 02:20:06,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-10-16 02:20:07,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 02:20:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10699 backedges. 4090 proven. 3072 refuted. 0 times theorem prover too weak. 3537 trivial. 0 not checked. [2022-10-16 02:20:14,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:20:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10699 backedges. 4204 proven. 2956 refuted. 0 times theorem prover too weak. 3539 trivial. 0 not checked. [2022-10-16 02:20:25,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103355906] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:20:25,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:20:25,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 52, 50] total 190 [2022-10-16 02:20:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341579858] [2022-10-16 02:20:25,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:20:25,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-10-16 02:20:25,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-10-16 02:20:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=35149, Unknown=0, NotChecked=0, Total=35910 [2022-10-16 02:20:25,201 INFO L87 Difference]: Start difference. First operand 552 states and 602 transitions. Second operand has 190 states, 188 states have (on average 3.1595744680851063) internal successors, (594), 189 states have internal predecessors, (594), 5 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 02:21:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:00,512 INFO L93 Difference]: Finished difference Result 1388 states and 1534 transitions. [2022-10-16 02:21:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-10-16 02:21:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 188 states have (on average 3.1595744680851063) internal successors, (594), 189 states have internal predecessors, (594), 5 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 513 [2022-10-16 02:21:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:00,524 INFO L225 Difference]: With dead ends: 1388 [2022-10-16 02:21:00,524 INFO L226 Difference]: Without dead ends: 1379 [2022-10-16 02:21:00,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1335 GetRequests, 1026 SyntacticMatches, 4 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23437 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=2763, Invalid=91179, Unknown=0, NotChecked=0, Total=93942 [2022-10-16 02:21:00,550 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1308 mSDsluCounter, 9163 mSDsCounter, 0 mSdLazyCounter, 31534 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 9275 SdHoareTripleChecker+Invalid, 48667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 31534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16958 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:00,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 9275 Invalid, 48667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [175 Valid, 31534 Invalid, 0 Unknown, 16958 Unchecked, 16.8s Time] [2022-10-16 02:21:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-10-16 02:21:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1178. [2022-10-16 02:21:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1164 states have (on average 1.1073883161512028) internal successors, (1289), 1167 states have internal predecessors, (1289), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-10-16 02:21:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1328 transitions. [2022-10-16 02:21:00,599 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1328 transitions. Word has length 513 [2022-10-16 02:21:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:00,600 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1328 transitions. [2022-10-16 02:21:00,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 188 states have (on average 3.1595744680851063) internal successors, (594), 189 states have internal predecessors, (594), 5 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 02:21:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1328 transitions. [2022-10-16 02:21:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-10-16 02:21:00,612 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:00,612 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 59, 20, 20, 20, 20, 19, 19, 19, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:00,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:00,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:00,826 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:00,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1402573300, now seen corresponding path program 2 times [2022-10-16 02:21:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:00,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398259085] [2022-10-16 02:21:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:00,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-16 02:21:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:19,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:21:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2022-10-16 02:21:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10699 backedges. 4088 proven. 5638 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2022-10-16 02:21:31,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398259085] [2022-10-16 02:21:31,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398259085] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407224352] [2022-10-16 02:21:31,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:21:31,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:31,126 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:31,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-16 02:21:31,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:21:31,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:21:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 300 conjunts are in the unsatisfiable core [2022-10-16 02:21:31,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:39,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 02:21:39,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-16 02:21:39,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-10-16 02:21:39,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 02:21:39,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-10-16 02:21:40,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:40,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:21:41,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2022-10-16 02:21:41,420 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 02:21:41,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2022-10-16 02:21:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10699 backedges. 2 proven. 9723 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2022-10-16 02:21:53,356 INFO L328 TraceCheckSpWp]: Computing backward predicates...