/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/list-ext3-properties/sll_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:42:48,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:42:48,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:42:49,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:42:49,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:42:49,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:42:49,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:42:49,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:42:49,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:42:49,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:42:49,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:42:49,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:42:49,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:42:49,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:42:49,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:42:49,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:42:49,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:42:49,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:42:49,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:42:49,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:42:49,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:42:49,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:42:49,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:42:49,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:42:49,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-16 05:42:49,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-16 05:42:49,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-16 05:42:49,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-16 05:42:49,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-16 05:42:49,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-16 05:42:49,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 05:42:49,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 05:42:49,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 05:42:49,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 05:42:49,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 05:42:49,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 05:42:49,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 05:42:49,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 05:42:49,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:42:49,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:42:49,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:42:49,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 05:42:49,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:42:49,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:42:49,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:42:49,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:42:49,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:42:49,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:42:49,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:42:49,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:42:49,102 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:42:49,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:42:49,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:42:49,102 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:42:49,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:42:49,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:42:49,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:42:49,103 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:42:49,103 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:42:49,105 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:42:49,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:42:49,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:42:49,106 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:42:49,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:42:49,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:42:49,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:42:49,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:42:49,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:42:49,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:42:49,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:42:49,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:42:49,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:42:49,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:42:49,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:42:49,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:42:49,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:42:49,553 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:42:49,554 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:42:49,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2022-10-16 05:42:49,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1a8334b/6dbe4918230043a6a27aec488432142a/FLAGafac77230 [2022-10-16 05:42:50,294 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:42:50,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2022-10-16 05:42:50,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1a8334b/6dbe4918230043a6a27aec488432142a/FLAGafac77230 [2022-10-16 05:42:50,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1a8334b/6dbe4918230043a6a27aec488432142a [2022-10-16 05:42:50,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:42:50,615 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:42:50,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:42:50,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:42:50,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:42:50,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:42:50" (1/1) ... [2022-10-16 05:42:50,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567dd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:50, skipping insertion in model container [2022-10-16 05:42:50,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:42:50" (1/1) ... [2022-10-16 05:42:50,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:42:50,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:42:50,987 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/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2022-10-16 05:42:50,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:42:51,019 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:42:51,070 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/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2022-10-16 05:42:51,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:42:51,107 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:42:51,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51 WrapperNode [2022-10-16 05:42:51,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:42:51,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:42:51,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:42:51,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:42:51,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,168 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2022-10-16 05:42:51,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:42:51,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:42:51,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:42:51,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:42:51,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,233 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:42:51,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:42:51,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:42:51,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:42:51,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (1/1) ... [2022-10-16 05:42:51,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:42:51,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:42:51,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 05:42:51,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 05:42:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-10-16 05:42:51,368 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-10-16 05:42:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-16 05:42:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2022-10-16 05:42:51,368 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2022-10-16 05:42:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:42:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:42:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-16 05:42:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-16 05:42:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:42:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-16 05:42:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:42:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:42:51,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:42:51,550 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:42:51,560 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:42:51,685 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-10-16 05:42:52,158 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:42:52,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:42:52,167 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-16 05:42:52,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:42:52 BoogieIcfgContainer [2022-10-16 05:42:52,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:42:52,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:42:52,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:42:52,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:42:52,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:42:50" (1/3) ... [2022-10-16 05:42:52,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ee87c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:42:52, skipping insertion in model container [2022-10-16 05:42:52,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:42:51" (2/3) ... [2022-10-16 05:42:52,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ee87c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:42:52, skipping insertion in model container [2022-10-16 05:42:52,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:42:52" (3/3) ... [2022-10-16 05:42:52,180 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2022-10-16 05:42:52,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:42:52,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-10-16 05:42:52,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:42:52,276 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;@5ee90252, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:42:52,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-10-16 05:42:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 82 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:42:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 05:42:52,291 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:52,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:42:52,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:52,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1214620074, now seen corresponding path program 1 times [2022-10-16 05:42:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328475244] [2022-10-16 05:42:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:52,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:52,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:42:52,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:52,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328475244] [2022-10-16 05:42:52,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328475244] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:52,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:42:52,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:42:52,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894434088] [2022-10-16 05:42:52,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-16 05:42:52,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-16 05:42:52,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-16 05:42:52,568 INFO L87 Difference]: Start difference. First operand has 88 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 82 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 05:42:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:52,601 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2022-10-16 05:42:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-16 05:42:52,604 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-10-16 05:42:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:52,615 INFO L225 Difference]: With dead ends: 88 [2022-10-16 05:42:52,615 INFO L226 Difference]: Without dead ends: 82 [2022-10-16 05:42:52,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-16 05:42:52,624 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:52,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:42:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-16 05:42:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-10-16 05:42:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 77 states have internal predecessors, (86), 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 05:42:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2022-10-16 05:42:52,700 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 13 [2022-10-16 05:42:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:52,701 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2022-10-16 05:42:52,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 05:42:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2022-10-16 05:42:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 05:42:52,705 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:52,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:42:52,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:42:52,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash 858123055, now seen corresponding path program 1 times [2022-10-16 05:42:52,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:52,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39374853] [2022-10-16 05:42:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:52,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:42:52,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39374853] [2022-10-16 05:42:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39374853] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:52,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:42:52,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:42:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329116160] [2022-10-16 05:42:52,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:52,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:42:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:42:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:42:52,908 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 05:42:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:53,117 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2022-10-16 05:42:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:42:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-10-16 05:42:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:53,125 INFO L225 Difference]: With dead ends: 145 [2022-10-16 05:42:53,126 INFO L226 Difference]: Without dead ends: 145 [2022-10-16 05:42:53,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:42:53,131 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 68 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:53,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 197 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:42:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-10-16 05:42:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 81. [2022-10-16 05:42:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 76 states have internal predecessors, (85), 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 05:42:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-10-16 05:42:53,167 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 15 [2022-10-16 05:42:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:53,167 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-10-16 05:42:53,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 05:42:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-10-16 05:42:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 05:42:53,171 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:53,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:42:53,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:42:53,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash 858123056, now seen corresponding path program 1 times [2022-10-16 05:42:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:53,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674284027] [2022-10-16 05:42:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:53,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:42:53,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:53,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674284027] [2022-10-16 05:42:53,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674284027] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:53,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:42:53,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:42:53,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305633942] [2022-10-16 05:42:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:53,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:42:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:42:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:42:53,399 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 05:42:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:53,531 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2022-10-16 05:42:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:42:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-10-16 05:42:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:53,536 INFO L225 Difference]: With dead ends: 146 [2022-10-16 05:42:53,537 INFO L226 Difference]: Without dead ends: 146 [2022-10-16 05:42:53,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:42:53,547 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:53,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 206 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:42:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-10-16 05:42:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2022-10-16 05:42:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 75 states have internal predecessors, (84), 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 05:42:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2022-10-16 05:42:53,572 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 15 [2022-10-16 05:42:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:53,573 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2022-10-16 05:42:53,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 05:42:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2022-10-16 05:42:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 05:42:53,576 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:53,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:42:53,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 05:42:53,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:53,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1495205364, now seen corresponding path program 1 times [2022-10-16 05:42:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:53,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140495280] [2022-10-16 05:42:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:53,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:53,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-16 05:42:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:42:54,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140495280] [2022-10-16 05:42:54,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140495280] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:42:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87289331] [2022-10-16 05:42:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:54,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:42:54,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:42:54,011 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:42:54,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 05:42:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-16 05:42:54,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:42:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:42:54,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:42:54,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87289331] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:54,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:42:54,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-10-16 05:42:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043375212] [2022-10-16 05:42:54,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:42:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:42:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-10-16 05:42:54,264 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:42:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:54,340 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2022-10-16 05:42:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 05:42:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-10-16 05:42:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:54,342 INFO L225 Difference]: With dead ends: 82 [2022-10-16 05:42:54,342 INFO L226 Difference]: Without dead ends: 82 [2022-10-16 05:42:54,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:42:54,351 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:54,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 471 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:42:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-16 05:42:54,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-10-16 05:42:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 77 states have internal predecessors, (86), 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 05:42:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2022-10-16 05:42:54,368 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 28 [2022-10-16 05:42:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:54,368 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2022-10-16 05:42:54,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:42:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2022-10-16 05:42:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 05:42:54,372 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:54,372 INFO L195 NwaCegarLoop]: trace histogram [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 05:42:54,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-16 05:42:54,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:42:54,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1796299413, now seen corresponding path program 1 times [2022-10-16 05:42:54,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:54,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191252687] [2022-10-16 05:42:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:54,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:54,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-16 05:42:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:42:54,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191252687] [2022-10-16 05:42:54,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191252687] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:54,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:42:54,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 05:42:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374078667] [2022-10-16 05:42:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:54,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:42:54,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:42:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:42:54,865 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 05:42:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:54,964 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2022-10-16 05:42:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 05:42:54,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-10-16 05:42:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:54,967 INFO L225 Difference]: With dead ends: 134 [2022-10-16 05:42:54,968 INFO L226 Difference]: Without dead ends: 134 [2022-10-16 05:42:54,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:42:54,969 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 50 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:54,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 452 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:42:54,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-10-16 05:42:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2022-10-16 05:42:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.515625) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 05:42:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2022-10-16 05:42:54,976 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 33 [2022-10-16 05:42:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:54,977 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2022-10-16 05:42:54,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 05:42:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2022-10-16 05:42:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 05:42:54,979 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:54,979 INFO L195 NwaCegarLoop]: trace histogram [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 05:42:54,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 05:42:54,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:54,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1796301335, now seen corresponding path program 1 times [2022-10-16 05:42:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:54,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949045918] [2022-10-16 05:42:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:55,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:55,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-10-16 05:42:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:42:55,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:55,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949045918] [2022-10-16 05:42:55,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949045918] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:42:55,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005018626] [2022-10-16 05:42:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:55,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:42:55,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:42:55,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:42:55,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 05:42:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 05:42:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:42:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:42:55,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:42:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:42:55,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005018626] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:42:55,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:42:55,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-10-16 05:42:55,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545476020] [2022-10-16 05:42:55,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:42:55,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 05:42:55,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:55,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 05:42:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-10-16 05:42:55,534 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 05:42:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:55,823 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2022-10-16 05:42:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 05:42:55,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-10-16 05:42:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:55,825 INFO L225 Difference]: With dead ends: 109 [2022-10-16 05:42:55,825 INFO L226 Difference]: Without dead ends: 109 [2022-10-16 05:42:55,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-10-16 05:42:55,827 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 28 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:55,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 813 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:42:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-10-16 05:42:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2022-10-16 05:42:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 91 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 05:42:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2022-10-16 05:42:55,834 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 33 [2022-10-16 05:42:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:55,834 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2022-10-16 05:42:55,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 05:42:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2022-10-16 05:42:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-16 05:42:55,836 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:55,836 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:42:55,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 05:42:56,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-16 05:42:56,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash 707774998, now seen corresponding path program 2 times [2022-10-16 05:42:56,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:56,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168732040] [2022-10-16 05:42:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:56,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:56,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:42:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-16 05:42:56,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:56,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168732040] [2022-10-16 05:42:56,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168732040] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:42:56,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58861051] [2022-10-16 05:42:56,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:42:56,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:42:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:42:56,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:42:56,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 05:42:56,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:42:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:42:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-16 05:42:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:42:56,415 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 05:42:56,441 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-16 05:42:56,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-16 05:42:56,465 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-16 05:42:56,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 05:42:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 05:42:56,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:42:56,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58861051] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:56,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:42:56,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-16 05:42:56,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779534223] [2022-10-16 05:42:56,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:56,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:42:56,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:56,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:42:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-16 05:42:56,532 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:42:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:56,577 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2022-10-16 05:42:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:42:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-10-16 05:42:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:56,579 INFO L225 Difference]: With dead ends: 120 [2022-10-16 05:42:56,579 INFO L226 Difference]: Without dead ends: 120 [2022-10-16 05:42:56,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-16 05:42:56,580 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 68 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:56,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 114 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-10-16 05:42:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-10-16 05:42:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2022-10-16 05:42:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.44) internal successors, (108), 95 states have internal predecessors, (108), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:42:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-10-16 05:42:56,587 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 38 [2022-10-16 05:42:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:56,588 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-10-16 05:42:56,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:42:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-10-16 05:42:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-16 05:42:56,589 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:56,589 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:42:56,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 05:42:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:42:56,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 707774999, now seen corresponding path program 1 times [2022-10-16 05:42:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085338664] [2022-10-16 05:42:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:57,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:57,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:42:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:42:57,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085338664] [2022-10-16 05:42:57,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085338664] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:42:57,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626160229] [2022-10-16 05:42:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:57,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:42:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:42:57,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:42:57,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 05:42:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-16 05:42:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:42:57,405 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 05:42:57,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 05:42:57,445 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:42:57,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-10-16 05:42:57,474 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 05:42:57,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 05:42:57,523 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:42:57,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-10-16 05:42:57,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 05:42:57,696 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 05:42:57,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-10-16 05:42:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:42:57,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:42:57,961 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 30 treesize of output 26 [2022-10-16 05:42:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:42:58,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626160229] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:42:58,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:42:58,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2022-10-16 05:42:58,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383565000] [2022-10-16 05:42:58,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:42:58,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-16 05:42:58,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-16 05:42:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:42:58,222 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:42:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:58,644 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2022-10-16 05:42:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 05:42:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-10-16 05:42:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:58,646 INFO L225 Difference]: With dead ends: 112 [2022-10-16 05:42:58,646 INFO L226 Difference]: Without dead ends: 112 [2022-10-16 05:42:58,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2022-10-16 05:42:58,647 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 347 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:58,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 587 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 274 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-10-16 05:42:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-10-16 05:42:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2022-10-16 05:42:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 93 states have internal predecessors, (106), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:42:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2022-10-16 05:42:58,653 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 38 [2022-10-16 05:42:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:58,653 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2022-10-16 05:42:58,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:42:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2022-10-16 05:42:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-16 05:42:58,655 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:58,655 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2022-10-16 05:42:58,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 05:42:58,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:42:58,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1330608943, now seen corresponding path program 1 times [2022-10-16 05:42:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:58,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793651766] [2022-10-16 05:42:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:58,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:59,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:59,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:42:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-16 05:42:59,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:59,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793651766] [2022-10-16 05:42:59,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793651766] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:59,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:42:59,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 05:42:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575955896] [2022-10-16 05:42:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:42:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:42:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:42:59,032 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 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 05:42:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:59,300 INFO L93 Difference]: Finished difference Result 181 states and 203 transitions. [2022-10-16 05:42:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-16 05:42:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 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 41 [2022-10-16 05:42:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:59,303 INFO L225 Difference]: With dead ends: 181 [2022-10-16 05:42:59,303 INFO L226 Difference]: Without dead ends: 181 [2022-10-16 05:42:59,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-10-16 05:42:59,305 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 487 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:59,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 276 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:42:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-10-16 05:42:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 108. [2022-10-16 05:42:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 101 states have internal predecessors, (118), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:42:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2022-10-16 05:42:59,312 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 41 [2022-10-16 05:42:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:59,312 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2022-10-16 05:42:59,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 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 05:42:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2022-10-16 05:42:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-16 05:42:59,314 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:59,314 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2022-10-16 05:42:59,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 05:42:59,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1330608944, now seen corresponding path program 1 times [2022-10-16 05:42:59,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:59,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114189363] [2022-10-16 05:42:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:59,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:42:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:42:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:42:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 05:42:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:42:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114189363] [2022-10-16 05:42:59,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114189363] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:42:59,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:42:59,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 05:42:59,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339972672] [2022-10-16 05:42:59,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:42:59,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:42:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:42:59,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:42:59,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:42:59,628 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 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 05:42:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:42:59,932 INFO L93 Difference]: Finished difference Result 171 states and 191 transitions. [2022-10-16 05:42:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-16 05:42:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 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 41 [2022-10-16 05:42:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:42:59,934 INFO L225 Difference]: With dead ends: 171 [2022-10-16 05:42:59,934 INFO L226 Difference]: Without dead ends: 171 [2022-10-16 05:42:59,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-10-16 05:42:59,936 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 507 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:42:59,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 260 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:42:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-10-16 05:42:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 108. [2022-10-16 05:42:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 101 states have internal predecessors, (117), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:42:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2022-10-16 05:42:59,942 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 41 [2022-10-16 05:42:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:42:59,942 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2022-10-16 05:42:59,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 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 05:42:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2022-10-16 05:42:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-16 05:42:59,944 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:42:59,944 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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, 1, 1] [2022-10-16 05:42:59,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 05:42:59,944 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:42:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:42:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1916325917, now seen corresponding path program 1 times [2022-10-16 05:42:59,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:42:59,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694992846] [2022-10-16 05:42:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:42:59,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:42:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:00,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:43:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:43:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 05:43:00,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:43:00,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694992846] [2022-10-16 05:43:00,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694992846] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:43:00,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:43:00,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-16 05:43:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039609887] [2022-10-16 05:43:00,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:43:00,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:43:00,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:43:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:43:00,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:43:00,084 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 05:43:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:43:00,210 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2022-10-16 05:43:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:43:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 44 [2022-10-16 05:43:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:43:00,214 INFO L225 Difference]: With dead ends: 150 [2022-10-16 05:43:00,214 INFO L226 Difference]: Without dead ends: 150 [2022-10-16 05:43:00,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:43:00,215 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 409 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:43:00,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 330 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:43:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-10-16 05:43:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 108. [2022-10-16 05:43:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 83 states have (on average 1.3975903614457832) internal successors, (116), 101 states have internal predecessors, (116), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:43:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2022-10-16 05:43:00,222 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 44 [2022-10-16 05:43:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:43:00,223 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2022-10-16 05:43:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 05:43:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2022-10-16 05:43:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-16 05:43:00,227 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:43:00,227 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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 05:43:00,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 05:43:00,228 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:43:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:43:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1917958211, now seen corresponding path program 1 times [2022-10-16 05:43:00,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:43:00,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117553497] [2022-10-16 05:43:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:43:00,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:43:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:00,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:43:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:43:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:43:00,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:43:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117553497] [2022-10-16 05:43:00,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117553497] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:43:00,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76879976] [2022-10-16 05:43:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:43:00,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:43:00,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:43:00,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:43:00,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 05:43:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:00,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-10-16 05:43:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:43:00,820 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 05:43:00,846 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-16 05:43:00,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-16 05:43:00,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 05:43:01,213 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 05:43:01,343 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-10-16 05:43:01,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-10-16 05:43:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:43:01,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:43:01,402 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 26 treesize of output 18 [2022-10-16 05:43:01,555 INFO L356 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2022-10-16 05:43:01,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 107 [2022-10-16 05:43:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:43:01,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76879976] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:43:01,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:43:01,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 25 [2022-10-16 05:43:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38019428] [2022-10-16 05:43:01,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:43:01,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-16 05:43:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:43:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-16 05:43:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-10-16 05:43:01,742 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 26 states, 25 states have (on average 2.88) internal successors, (72), 26 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:43:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:43:02,199 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2022-10-16 05:43:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 05:43:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 26 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-10-16 05:43:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:43:02,201 INFO L225 Difference]: With dead ends: 148 [2022-10-16 05:43:02,201 INFO L226 Difference]: Without dead ends: 148 [2022-10-16 05:43:02,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:43:02,203 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 89 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:43:02,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1104 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 421 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-10-16 05:43:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-10-16 05:43:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2022-10-16 05:43:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:43:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2022-10-16 05:43:02,208 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 44 [2022-10-16 05:43:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:43:02,209 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2022-10-16 05:43:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 26 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:43:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2022-10-16 05:43:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-16 05:43:02,210 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:43:02,210 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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 05:43:02,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 05:43:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-16 05:43:02,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:43:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:43:02,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1917958212, now seen corresponding path program 1 times [2022-10-16 05:43:02,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:43:02,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239647377] [2022-10-16 05:43:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:43:02,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:43:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:03,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:43:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:03,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:43:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:43:03,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:43:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239647377] [2022-10-16 05:43:03,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239647377] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:43:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112792860] [2022-10-16 05:43:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:43:03,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:43:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:43:03,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:43:03,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 05:43:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2022-10-16 05:43:03,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:43:03,151 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 05:43:03,251 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 05:43:03,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 05:43:03,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 16 [2022-10-16 05:43:03,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 05:43:03,325 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 11 treesize of output 7 [2022-10-16 05:43:03,920 INFO L356 Elim1Store]: treesize reduction 15, result has 53.1 percent of original size [2022-10-16 05:43:03,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 50 [2022-10-16 05:43:03,935 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-10-16 05:43:03,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2022-10-16 05:43:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:43:04,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:43:04,628 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 106 treesize of output 98 [2022-10-16 05:43:04,717 INFO L356 Elim1Store]: treesize reduction 33, result has 66.7 percent of original size [2022-10-16 05:43:04,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 245 [2022-10-16 05:43:04,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:43:04,974 INFO L356 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-10-16 05:43:04,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 294 treesize of output 273 [2022-10-16 05:43:05,084 INFO L356 Elim1Store]: treesize reduction 33, result has 66.7 percent of original size [2022-10-16 05:43:05,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 572 treesize of output 553 [2022-10-16 05:43:14,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-10-16 05:43:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:43:14,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112792860] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:43:14,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:43:14,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2022-10-16 05:43:14,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742489963] [2022-10-16 05:43:14,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:43:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-16 05:43:14,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:43:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-16 05:43:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 05:43:14,107 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 39 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 05:43:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:43:15,760 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2022-10-16 05:43:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 05:43:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 39 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2022-10-16 05:43:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:43:15,762 INFO L225 Difference]: With dead ends: 158 [2022-10-16 05:43:15,762 INFO L226 Difference]: Without dead ends: 158 [2022-10-16 05:43:15,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2022-10-16 05:43:15,764 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 180 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:43:15,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1353 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 451 Invalid, 0 Unknown, 354 Unchecked, 0.4s Time] [2022-10-16 05:43:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-16 05:43:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2022-10-16 05:43:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 104 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:43:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2022-10-16 05:43:15,772 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 44 [2022-10-16 05:43:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:43:15,772 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2022-10-16 05:43:15,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 39 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 05:43:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2022-10-16 05:43:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-16 05:43:15,773 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:43:15,774 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1] [2022-10-16 05:43:15,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 05:43:15,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:43:15,980 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:43:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:43:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1941605001, now seen corresponding path program 1 times [2022-10-16 05:43:15,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:43:15,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728796130] [2022-10-16 05:43:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:43:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:43:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:16,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:43:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:16,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:43:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:43:16,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:43:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728796130] [2022-10-16 05:43:16,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728796130] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:43:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548200321] [2022-10-16 05:43:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:43:16,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:43:16,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:43:16,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:43:16,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 05:43:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-16 05:43:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:43:16,395 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 05:43:16,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 05:43:16,823 INFO L356 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-10-16 05:43:16,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 38 [2022-10-16 05:43:16,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 05:43:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:43:16,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:43:17,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548200321] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:43:17,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 05:43:17,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2022-10-16 05:43:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142400101] [2022-10-16 05:43:17,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 05:43:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-16 05:43:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:43:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-16 05:43:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-10-16 05:43:17,048 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:43:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:43:17,666 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2022-10-16 05:43:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 05:43:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-10-16 05:43:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:43:17,668 INFO L225 Difference]: With dead ends: 132 [2022-10-16 05:43:17,668 INFO L226 Difference]: Without dead ends: 132 [2022-10-16 05:43:17,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:43:17,670 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 63 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:43:17,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1134 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 344 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-10-16 05:43:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-10-16 05:43:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2022-10-16 05:43:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 104 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 05:43:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-10-16 05:43:17,675 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 47 [2022-10-16 05:43:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:43:17,676 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-10-16 05:43:17,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:43:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-10-16 05:43:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-16 05:43:17,677 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:43:17,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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] [2022-10-16 05:43:17,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 05:43:17,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:43:17,879 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 05:43:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:43:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1943237295, now seen corresponding path program 2 times [2022-10-16 05:43:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:43:17,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722214911] [2022-10-16 05:43:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:43:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:43:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:18,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 05:43:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-16 05:43:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:43:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:43:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:43:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722214911] [2022-10-16 05:43:18,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722214911] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:43:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398786859] [2022-10-16 05:43:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:43:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:43:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:43:18,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:43:18,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 05:43:18,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:43:18,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:43:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 74 conjunts are in the unsatisfiable core [2022-10-16 05:43:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:43:18,819 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 05:43:18,864 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 11 treesize of output 7 [2022-10-16 05:43:18,871 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 11 treesize of output 7 [2022-10-16 05:43:18,967 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 05:43:18,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 05:43:19,036 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 19 treesize of output 18 [2022-10-16 05:43:19,042 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 05:43:20,128 INFO L356 Elim1Store]: treesize reduction 80, result has 28.6 percent of original size [2022-10-16 05:43:20,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 91 [2022-10-16 05:43:20,155 INFO L356 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-10-16 05:43:20,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 46 [2022-10-16 05:43:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:43:20,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:43:22,626 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (and (forall ((|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)) 0) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse1)) (not (= .cse2 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))))) (forall ((|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse4 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse4)) (= (select (select .cse3 (select (select .cse0 .cse4) .cse5)) (select (select .cse3 .cse4) .cse5)) 0) (not (= .cse5 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))))))) is different from false [2022-10-16 05:43:33,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:43:33,186 INFO L356 Elim1Store]: treesize reduction 39, result has 72.5 percent of original size [2022-10-16 05:43:33,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 7820 treesize of output 7278 [2022-10-16 05:44:03,146 WARN L233 SmtUtils]: Spent 29.44s on a formula simplification. DAG size of input: 2487 DAG size of output: 917 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-10-16 05:44:03,155 INFO L356 Elim1Store]: treesize reduction 5738, result has 28.2 percent of original size [2022-10-16 05:44:03,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 0 disjoint index pairs (out of 780 index pairs), introduced 49 new quantified variables, introduced 780 case distinctions, treesize of input 273638 treesize of output 211888 [2022-10-16 05:44:34,061 WARN L233 SmtUtils]: Spent 30.89s on a formula simplification. DAG size of input: 2277 DAG size of output: 2233 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-10-16 05:44:49,831 WARN L233 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 1351 DAG size of output: 1351 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-10-16 05:45:37,654 WARN L233 SmtUtils]: Spent 8.88s on a formula simplification. DAG size of input: 1322 DAG size of output: 1322 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)