./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/dll-reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/dll-reverse.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:30:49,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:30:49,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:30:49,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:30:49,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:30:49,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:30:49,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:30:49,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:30:49,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:30:49,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:30:49,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:30:49,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:30:49,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:30:49,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:30:49,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:30:49,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:30:49,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:30:49,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:30:49,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:30:49,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:30:49,081 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:30:49,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:30:49,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:30:49,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:30:49,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:30:49,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:30:49,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:30:49,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:30:49,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:30:49,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:30:49,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:30:49,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:30:49,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:30:49,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:30:49,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:30:49,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:30:49,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:30:49,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:30:49,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:30:49,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:30:49,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:30:49,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:30:49,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:30:49,132 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:30:49,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:30:49,133 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:30:49,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:30:49,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:30:49,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:30:49,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:30:49,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:30:49,135 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:30:49,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:30:49,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:30:49,141 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:30:49,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:30:49,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:30:49,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:30:49,141 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:30:49,142 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:30:49,142 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:30:49,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:30:49,142 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:30:49,142 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:30:49,142 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:30:49,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:30:49,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:30:49,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:30:49,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:30:49,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:30:49,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:30:49,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:30:49,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:30:49,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2022-07-21 17:30:49,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:30:49,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:30:49,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:30:49,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:30:49,433 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:30:49,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-reverse.i [2022-07-21 17:30:49,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4429d2f0/cd58bdecb0c64c34a5bf8a22bc8dc768/FLAGee0054bfa [2022-07-21 17:30:49,876 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:30:49,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i [2022-07-21 17:30:49,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4429d2f0/cd58bdecb0c64c34a5bf8a22bc8dc768/FLAGee0054bfa [2022-07-21 17:30:50,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4429d2f0/cd58bdecb0c64c34a5bf8a22bc8dc768 [2022-07-21 17:30:50,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:30:50,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:30:50,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:30:50,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:30:50,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:30:50,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c9d8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50, skipping insertion in model container [2022-07-21 17:30:50,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:30:50,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:30:50,492 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/forester-heap/dll-reverse.i[22309,22322] [2022-07-21 17:30:50,495 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/forester-heap/dll-reverse.i[22394,22407] [2022-07-21 17:30:50,508 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/forester-heap/dll-reverse.i[22924,22937] [2022-07-21 17:30:50,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:30:50,523 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:30:50,562 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/forester-heap/dll-reverse.i[22309,22322] [2022-07-21 17:30:50,565 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/forester-heap/dll-reverse.i[22394,22407] [2022-07-21 17:30:50,569 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/forester-heap/dll-reverse.i[22924,22937] [2022-07-21 17:30:50,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:30:50,599 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:30:50,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50 WrapperNode [2022-07-21 17:30:50,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:30:50,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:30:50,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:30:50,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:30:50,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,642 INFO L137 Inliner]: procedures = 119, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2022-07-21 17:30:50,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:30:50,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:30:50,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:30:50,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:30:50,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:30:50,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:30:50,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:30:50,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:30:50,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (1/1) ... [2022-07-21 17:30:50,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:30:50,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:30:50,697 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) [2022-07-21 17:30:50,700 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 [2022-07-21 17:30:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:30:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:30:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:30:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:30:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:30:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:30:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:30:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:30:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:30:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:30:50,844 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:30:50,845 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:30:51,180 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:30:51,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:30:51,186 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-21 17:30:51,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:30:51 BoogieIcfgContainer [2022-07-21 17:30:51,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:30:51,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:30:51,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:30:51,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:30:51,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:30:50" (1/3) ... [2022-07-21 17:30:51,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629b3386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:30:51, skipping insertion in model container [2022-07-21 17:30:51,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:30:50" (2/3) ... [2022-07-21 17:30:51,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629b3386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:30:51, skipping insertion in model container [2022-07-21 17:30:51,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:30:51" (3/3) ... [2022-07-21 17:30:51,197 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2022-07-21 17:30:51,207 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:30:51,207 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 69 error locations. [2022-07-21 17:30:51,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:30:51,249 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a29f51e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4869f89e [2022-07-21 17:30:51,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2022-07-21 17:30:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 148 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-21 17:30:51,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:51,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-21 17:30:51,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-07-21 17:30:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:51,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661964413] [2022-07-21 17:30:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:51,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:51,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661964413] [2022-07-21 17:30:51,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661964413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:51,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:51,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:30:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928679441] [2022-07-21 17:30:51,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:30:51,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:30:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:30:51,451 INFO L87 Difference]: Start difference. First operand has 149 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 148 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:51,581 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2022-07-21 17:30:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:30:51,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-21 17:30:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:51,602 INFO L225 Difference]: With dead ends: 146 [2022-07-21 17:30:51,602 INFO L226 Difference]: Without dead ends: 144 [2022-07-21 17:30:51,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:30:51,605 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:51,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-21 17:30:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-21 17:30:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 78 states have (on average 1.9487179487179487) internal successors, (152), 143 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-07-21 17:30:51,659 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 3 [2022-07-21 17:30:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:51,660 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-07-21 17:30:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-07-21 17:30:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-21 17:30:51,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:51,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-21 17:30:51,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:30:51,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:51,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-07-21 17:30:51,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:51,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256022731] [2022-07-21 17:30:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:51,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:51,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:51,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256022731] [2022-07-21 17:30:51,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256022731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:51,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:51,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:30:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477604366] [2022-07-21 17:30:51,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:30:51,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:30:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:30:51,716 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:51,810 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-07-21 17:30:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:30:51,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-21 17:30:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:51,811 INFO L225 Difference]: With dead ends: 141 [2022-07-21 17:30:51,811 INFO L226 Difference]: Without dead ends: 141 [2022-07-21 17:30:51,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:30:51,812 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 97 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:51,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 124 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-21 17:30:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-21 17:30:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 140 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 149 transitions. [2022-07-21 17:30:51,817 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 149 transitions. Word has length 3 [2022-07-21 17:30:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:51,817 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 149 transitions. [2022-07-21 17:30:51,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 149 transitions. [2022-07-21 17:30:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:30:51,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:51,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:51,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:30:51,818 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112042, now seen corresponding path program 1 times [2022-07-21 17:30:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:51,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667448512] [2022-07-21 17:30:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:51,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:51,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:51,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667448512] [2022-07-21 17:30:51,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667448512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:51,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:51,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:30:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092018535] [2022-07-21 17:30:51,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:51,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:30:51,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:30:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:30:51,869 INFO L87 Difference]: Start difference. First operand 141 states and 149 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:52,000 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2022-07-21 17:30:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:30:52,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 17:30:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:52,001 INFO L225 Difference]: With dead ends: 132 [2022-07-21 17:30:52,001 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 17:30:52,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:30:52,002 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:52,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 90 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 17:30:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-07-21 17:30:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.7073170731707317) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2022-07-21 17:30:52,007 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 9 [2022-07-21 17:30:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:52,007 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2022-07-21 17:30:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2022-07-21 17:30:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:30:52,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:52,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:30:52,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112043, now seen corresponding path program 1 times [2022-07-21 17:30:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311404025] [2022-07-21 17:30:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:52,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:52,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311404025] [2022-07-21 17:30:52,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311404025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:52,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:52,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:30:52,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986405011] [2022-07-21 17:30:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:52,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:30:52,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:30:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:30:52,068 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:52,214 INFO L93 Difference]: Finished difference Result 176 states and 190 transitions. [2022-07-21 17:30:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:30:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 17:30:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:52,217 INFO L225 Difference]: With dead ends: 176 [2022-07-21 17:30:52,217 INFO L226 Difference]: Without dead ends: 176 [2022-07-21 17:30:52,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:30:52,218 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 176 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:52,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 137 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-21 17:30:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2022-07-21 17:30:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 111 states have (on average 1.5945945945945945) internal successors, (177), 156 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2022-07-21 17:30:52,223 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 9 [2022-07-21 17:30:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:52,223 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2022-07-21 17:30:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2022-07-21 17:30:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:30:52,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:52,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:30:52,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413642, now seen corresponding path program 1 times [2022-07-21 17:30:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017643390] [2022-07-21 17:30:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:52,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017643390] [2022-07-21 17:30:52,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017643390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:52,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:52,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:30:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091193156] [2022-07-21 17:30:52,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:52,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:30:52,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:30:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:30:52,278 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:52,431 INFO L93 Difference]: Finished difference Result 156 states and 175 transitions. [2022-07-21 17:30:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:30:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:30:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:52,432 INFO L225 Difference]: With dead ends: 156 [2022-07-21 17:30:52,432 INFO L226 Difference]: Without dead ends: 156 [2022-07-21 17:30:52,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:30:52,433 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:52,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 297 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-21 17:30:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-07-21 17:30:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 111 states have (on average 1.5765765765765767) internal successors, (175), 155 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2022-07-21 17:30:52,438 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 12 [2022-07-21 17:30:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:52,438 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2022-07-21 17:30:52,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2022-07-21 17:30:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:30:52,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:52,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:30:52,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413643, now seen corresponding path program 1 times [2022-07-21 17:30:52,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:52,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192724023] [2022-07-21 17:30:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:52,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:52,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192724023] [2022-07-21 17:30:52,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192724023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:52,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:52,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:30:52,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30300145] [2022-07-21 17:30:52,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:52,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:30:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:30:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:30:52,476 INFO L87 Difference]: Start difference. First operand 156 states and 175 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:52,614 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2022-07-21 17:30:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:30:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:30:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:52,615 INFO L225 Difference]: With dead ends: 155 [2022-07-21 17:30:52,615 INFO L226 Difference]: Without dead ends: 155 [2022-07-21 17:30:52,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:30:52,616 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 7 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:52,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 315 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-21 17:30:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-07-21 17:30:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 154 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2022-07-21 17:30:52,621 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 12 [2022-07-21 17:30:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:52,621 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2022-07-21 17:30:52,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2022-07-21 17:30:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:30:52,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:52,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:52,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 17:30:52,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1455563597, now seen corresponding path program 1 times [2022-07-21 17:30:52,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:52,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044977678] [2022-07-21 17:30:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:52,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:52,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044977678] [2022-07-21 17:30:52,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044977678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:52,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:52,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:30:52,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792779239] [2022-07-21 17:30:52,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:52,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:30:52,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:30:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:30:52,676 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:52,774 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2022-07-21 17:30:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:30:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 17:30:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:52,775 INFO L225 Difference]: With dead ends: 167 [2022-07-21 17:30:52,775 INFO L226 Difference]: Without dead ends: 167 [2022-07-21 17:30:52,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:30:52,778 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 158 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:52,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 190 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-21 17:30:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-07-21 17:30:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.5315315315315314) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2022-07-21 17:30:52,788 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 15 [2022-07-21 17:30:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:52,788 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2022-07-21 17:30:52,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2022-07-21 17:30:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:30:52,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:52,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:52,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 17:30:52,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:52,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362871, now seen corresponding path program 1 times [2022-07-21 17:30:52,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:52,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420517243] [2022-07-21 17:30:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:52,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:52,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:52,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420517243] [2022-07-21 17:30:52,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420517243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:52,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:52,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 17:30:52,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634724528] [2022-07-21 17:30:52,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:52,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:30:52,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:30:52,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:30:52,912 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:53,190 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-07-21 17:30:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:30:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 17:30:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:53,192 INFO L225 Difference]: With dead ends: 155 [2022-07-21 17:30:53,192 INFO L226 Difference]: Without dead ends: 155 [2022-07-21 17:30:53,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:30:53,193 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:53,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 247 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:30:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-21 17:30:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-07-21 17:30:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.5225225225225225) internal successors, (169), 153 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2022-07-21 17:30:53,196 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 16 [2022-07-21 17:30:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:53,196 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2022-07-21 17:30:53,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2022-07-21 17:30:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:30:53,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:53,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:53,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 17:30:53,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362872, now seen corresponding path program 1 times [2022-07-21 17:30:53,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:53,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546510783] [2022-07-21 17:30:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:53,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:53,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:53,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546510783] [2022-07-21 17:30:53,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546510783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:53,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:53,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:30:53,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034041639] [2022-07-21 17:30:53,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:53,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:30:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:30:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:30:53,303 INFO L87 Difference]: Start difference. First operand 154 states and 169 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:53,779 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2022-07-21 17:30:53,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:30:53,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 17:30:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:53,780 INFO L225 Difference]: With dead ends: 152 [2022-07-21 17:30:53,780 INFO L226 Difference]: Without dead ends: 152 [2022-07-21 17:30:53,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:30:53,781 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 159 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:53,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 333 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:30:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-21 17:30:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2022-07-21 17:30:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 140 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-07-21 17:30:53,784 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 16 [2022-07-21 17:30:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:53,784 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-07-21 17:30:53,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-07-21 17:30:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:30:53,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:53,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:53,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 17:30:53,785 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash 743663712, now seen corresponding path program 1 times [2022-07-21 17:30:53,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:53,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782884129] [2022-07-21 17:30:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:53,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:53,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782884129] [2022-07-21 17:30:53,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782884129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:53,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:53,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:30:53,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493735694] [2022-07-21 17:30:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:53,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:30:53,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:30:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:30:53,839 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:53,965 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2022-07-21 17:30:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:30:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 17:30:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:53,966 INFO L225 Difference]: With dead ends: 162 [2022-07-21 17:30:53,966 INFO L226 Difference]: Without dead ends: 162 [2022-07-21 17:30:53,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:30:53,967 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 27 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:53,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 442 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-21 17:30:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2022-07-21 17:30:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 148 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2022-07-21 17:30:53,969 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 18 [2022-07-21 17:30:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:53,970 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2022-07-21 17:30:53,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2022-07-21 17:30:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 17:30:53,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:53,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:53,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 17:30:53,970 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash -573987105, now seen corresponding path program 1 times [2022-07-21 17:30:53,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:53,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696281790] [2022-07-21 17:30:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:53,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696281790] [2022-07-21 17:30:54,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696281790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:54,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:54,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:30:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664032347] [2022-07-21 17:30:54,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:30:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:30:54,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:30:54,025 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:54,142 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2022-07-21 17:30:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:30:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 17:30:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:54,143 INFO L225 Difference]: With dead ends: 168 [2022-07-21 17:30:54,143 INFO L226 Difference]: Without dead ends: 168 [2022-07-21 17:30:54,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:30:54,144 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 25 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:54,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 319 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-21 17:30:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2022-07-21 17:30:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 121 states have (on average 1.462809917355372) internal successors, (177), 158 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2022-07-21 17:30:54,147 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 20 [2022-07-21 17:30:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:54,147 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2022-07-21 17:30:54,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2022-07-21 17:30:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:30:54,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:54,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 17:30:54,148 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1867739349, now seen corresponding path program 1 times [2022-07-21 17:30:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:54,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887574175] [2022-07-21 17:30:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:54,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:54,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887574175] [2022-07-21 17:30:54,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887574175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:54,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:54,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:30:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147556206] [2022-07-21 17:30:54,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:54,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:30:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:30:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:30:54,187 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:54,299 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2022-07-21 17:30:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:30:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 17:30:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:54,300 INFO L225 Difference]: With dead ends: 158 [2022-07-21 17:30:54,300 INFO L226 Difference]: Without dead ends: 158 [2022-07-21 17:30:54,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:30:54,300 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:54,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-21 17:30:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-07-21 17:30:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 121 states have (on average 1.4462809917355373) internal successors, (175), 157 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2022-07-21 17:30:54,303 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 22 [2022-07-21 17:30:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:54,303 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2022-07-21 17:30:54,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2022-07-21 17:30:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:30:54,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:54,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:54,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 17:30:54,304 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1867739348, now seen corresponding path program 1 times [2022-07-21 17:30:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:54,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695660221] [2022-07-21 17:30:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:54,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:54,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:54,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695660221] [2022-07-21 17:30:54,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695660221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:54,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:54,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:30:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202455500] [2022-07-21 17:30:54,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:54,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:30:54,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:30:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:30:54,346 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:54,459 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2022-07-21 17:30:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:30:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 17:30:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:54,460 INFO L225 Difference]: With dead ends: 157 [2022-07-21 17:30:54,460 INFO L226 Difference]: Without dead ends: 157 [2022-07-21 17:30:54,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:30:54,460 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:54,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:30:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-21 17:30:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-07-21 17:30:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 121 states have (on average 1.4297520661157024) internal successors, (173), 156 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 173 transitions. [2022-07-21 17:30:54,463 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 173 transitions. Word has length 22 [2022-07-21 17:30:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:54,463 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 173 transitions. [2022-07-21 17:30:54,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 173 transitions. [2022-07-21 17:30:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:30:54,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:54,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 17:30:54,464 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1012469357, now seen corresponding path program 1 times [2022-07-21 17:30:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:54,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429150156] [2022-07-21 17:30:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:54,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:54,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:54,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429150156] [2022-07-21 17:30:54,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429150156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:54,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:54,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 17:30:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405704662] [2022-07-21 17:30:54,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:30:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:30:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:30:54,540 INFO L87 Difference]: Start difference. First operand 157 states and 173 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:54,792 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2022-07-21 17:30:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:30:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 17:30:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:54,794 INFO L225 Difference]: With dead ends: 157 [2022-07-21 17:30:54,794 INFO L226 Difference]: Without dead ends: 157 [2022-07-21 17:30:54,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:30:54,794 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 140 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:54,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 273 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:30:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-21 17:30:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-07-21 17:30:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 121 states have (on average 1.421487603305785) internal successors, (172), 155 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2022-07-21 17:30:54,797 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 26 [2022-07-21 17:30:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:54,797 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2022-07-21 17:30:54,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2022-07-21 17:30:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:30:54,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:54,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:30:54,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 17:30:54,798 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:54,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:54,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1012469358, now seen corresponding path program 1 times [2022-07-21 17:30:54,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:54,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090868465] [2022-07-21 17:30:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:54,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:54,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:54,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090868465] [2022-07-21 17:30:54,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090868465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:30:54,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:30:54,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:30:54,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039456227] [2022-07-21 17:30:54,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:30:54,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:30:54,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:54,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:30:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:30:54,885 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:55,205 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2022-07-21 17:30:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:30:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 17:30:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:55,206 INFO L225 Difference]: With dead ends: 156 [2022-07-21 17:30:55,206 INFO L226 Difference]: Without dead ends: 156 [2022-07-21 17:30:55,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:30:55,207 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 137 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:55,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 313 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:30:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-21 17:30:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2022-07-21 17:30:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 121 states have (on average 1.4049586776859504) internal successors, (170), 153 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2022-07-21 17:30:55,209 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 26 [2022-07-21 17:30:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:55,210 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2022-07-21 17:30:55,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2022-07-21 17:30:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:30:55,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:55,210 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-21 17:30:55,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 17:30:55,210 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:55,211 INFO L85 PathProgramCache]: Analyzing trace with hash -560637622, now seen corresponding path program 1 times [2022-07-21 17:30:55,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:55,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566622913] [2022-07-21 17:30:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:55,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:55,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:55,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566622913] [2022-07-21 17:30:55,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566622913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:30:55,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312246795] [2022-07-21 17:30:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:55,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:30:55,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:30:55,339 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) [2022-07-21 17:30:55,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:30:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 17:30:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:30:55,508 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 [2022-07-21 17:30:55,602 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:30:55,602 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 [2022-07-21 17:30:55,663 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 [2022-07-21 17:30:55,781 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:30:55,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:30:55,861 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:30:55,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 29 [2022-07-21 17:30:55,878 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:30:55,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:30:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:30:55,990 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:30:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:56,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:30:56,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:30:56,337 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-07-21 17:30:56,351 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:30:56,351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 227 [2022-07-21 17:30:56,358 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 212 treesize of output 204 [2022-07-21 17:30:56,367 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:30:56,367 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 204 treesize of output 196 [2022-07-21 17:30:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:58,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312246795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:30:58,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:30:58,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 34 [2022-07-21 17:30:58,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831306332] [2022-07-21 17:30:58,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:30:58,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:30:58,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:30:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:30:58,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1001, Unknown=19, NotChecked=0, Total=1190 [2022-07-21 17:30:58,184 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:30:58,708 INFO L93 Difference]: Finished difference Result 225 states and 248 transitions. [2022-07-21 17:30:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:30:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-21 17:30:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:30:58,709 INFO L225 Difference]: With dead ends: 225 [2022-07-21 17:30:58,709 INFO L226 Difference]: Without dead ends: 225 [2022-07-21 17:30:58,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=1338, Unknown=19, NotChecked=0, Total=1640 [2022-07-21 17:30:58,710 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 517 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1065 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:30:58,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 847 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 899 Invalid, 0 Unknown, 1065 Unchecked, 0.4s Time] [2022-07-21 17:30:58,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-21 17:30:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 175. [2022-07-21 17:30:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 142 states have (on average 1.3732394366197183) internal successors, (195), 174 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2022-07-21 17:30:58,713 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 29 [2022-07-21 17:30:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:30:58,713 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2022-07-21 17:30:58,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:30:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2022-07-21 17:30:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:30:58,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:30:58,714 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-21 17:30:58,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:30:58,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 17:30:58,923 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:30:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:30:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash -560637621, now seen corresponding path program 1 times [2022-07-21 17:30:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:30:58,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859388819] [2022-07-21 17:30:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:30:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:30:59,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859388819] [2022-07-21 17:30:59,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859388819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:30:59,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845725551] [2022-07-21 17:30:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:30:59,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:30:59,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:30:59,117 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) [2022-07-21 17:30:59,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:30:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:30:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 17:30:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:30:59,205 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 [2022-07-21 17:30:59,249 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:30:59,250 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 [2022-07-21 17:30:59,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:30:59,280 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 [2022-07-21 17:30:59,284 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 [2022-07-21 17:30:59,356 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:30:59,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:30:59,359 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 18 treesize of output 20 [2022-07-21 17:30:59,433 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:30:59,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 20 [2022-07-21 17:30:59,437 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 5 treesize of output 3 [2022-07-21 17:30:59,448 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:30:59,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 29 [2022-07-21 17:30:59,479 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:30:59,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:30:59,482 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 18 treesize of output 20 [2022-07-21 17:30:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:30:59,604 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:30:59,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:30:59,610 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:30:59,610 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-21 17:30:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:30:59,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:30:59,868 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_589 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_81| Int) (v_ArrVal_588 (Array Int Int))) (or (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_81|))) (and (<= (+ 4 .cse0) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_589) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_81|))) (<= 0 .cse0))) (< |v_ULTIMATE.start_main_~x~0#1.offset_81| 0) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_81| |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-07-21 17:31:00,110 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_81| Int) (v_ArrVal_584 (Array Int Int)) (v_ArrVal_585 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~x~0#1.offset_81| 0) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_81| |c_ULTIMATE.start_main_~head~0#1.offset|)) (and (forall ((v_ArrVal_589 (Array Int Int)) (v_ArrVal_588 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_584))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_585) .cse0 v_ArrVal_588) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_81|) 4) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_589) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_81|)))))) (forall ((v_ArrVal_588 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_585) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_584) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_588) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_81|)))))) is different from false [2022-07-21 17:31:00,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:00,262 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-07-21 17:31:00,266 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:00,266 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:31:00,269 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 50 treesize of output 42 [2022-07-21 17:31:00,275 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:00,276 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 161 [2022-07-21 17:31:00,282 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 122 treesize of output 118 [2022-07-21 17:31:00,285 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 142 treesize of output 132 [2022-07-21 17:31:00,289 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 110 treesize of output 98 [2022-07-21 17:31:00,384 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:00,384 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2022-07-21 17:31:00,389 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:00,390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2022-07-21 17:31:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:00,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2022-07-21 17:31:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:00,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-07-21 17:31:00,400 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 13 treesize of output 11 [2022-07-21 17:31:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:00,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845725551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:31:00,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:31:00,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 38 [2022-07-21 17:31:00,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833429971] [2022-07-21 17:31:00,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:31:00,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 17:31:00,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:31:00,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 17:31:00,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1193, Unknown=14, NotChecked=142, Total=1482 [2022-07-21 17:31:00,638 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:31:02,006 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2022-07-21 17:31:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:31:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-21 17:31:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:31:02,007 INFO L225 Difference]: With dead ends: 277 [2022-07-21 17:31:02,007 INFO L226 Difference]: Without dead ends: 277 [2022-07-21 17:31:02,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=335, Invalid=2209, Unknown=14, NotChecked=198, Total=2756 [2022-07-21 17:31:02,008 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 366 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:31:02,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1659 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1755 Invalid, 0 Unknown, 997 Unchecked, 0.8s Time] [2022-07-21 17:31:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-07-21 17:31:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 173. [2022-07-21 17:31:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 146 states have (on average 1.356164383561644) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2022-07-21 17:31:02,011 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2022-07-21 17:31:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:31:02,011 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2022-07-21 17:31:02,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2022-07-21 17:31:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:31:02,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:31:02,012 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-21 17:31:02,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:31:02,227 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,SelfDestructingSolverStorable16 [2022-07-21 17:31:02,227 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:31:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:31:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash -557177017, now seen corresponding path program 1 times [2022-07-21 17:31:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:31:02,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602073095] [2022-07-21 17:31:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:31:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:02,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:31:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602073095] [2022-07-21 17:31:02,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602073095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:31:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039895989] [2022-07-21 17:31:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:02,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:31:02,355 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) [2022-07-21 17:31:02,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:31:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:02,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 17:31:02,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:31:02,451 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 [2022-07-21 17:31:02,495 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:31:02,495 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 [2022-07-21 17:31:02,523 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 [2022-07-21 17:31:02,592 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:02,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:31:02,661 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:02,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 29 [2022-07-21 17:31:02,677 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:02,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:31:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:31:02,786 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 31 treesize of output 26 [2022-07-21 17:31:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:02,804 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:31:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:02,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:31:03,080 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:03,081 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-07-21 17:31:03,088 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:03,088 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 227 [2022-07-21 17:31:03,097 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 212 treesize of output 204 [2022-07-21 17:31:03,109 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:03,109 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 204 treesize of output 196 [2022-07-21 17:31:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:08,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039895989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:31:08,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:31:08,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 32 [2022-07-21 17:31:08,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025174493] [2022-07-21 17:31:08,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:31:08,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 17:31:08,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:31:08,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 17:31:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=883, Unknown=22, NotChecked=0, Total=1056 [2022-07-21 17:31:08,571 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:31:09,088 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2022-07-21 17:31:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:31:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 17:31:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:31:09,090 INFO L225 Difference]: With dead ends: 243 [2022-07-21 17:31:09,091 INFO L226 Difference]: Without dead ends: 243 [2022-07-21 17:31:09,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1215, Unknown=22, NotChecked=0, Total=1482 [2022-07-21 17:31:09,091 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 521 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 862 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:31:09,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1049 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 932 Invalid, 0 Unknown, 862 Unchecked, 0.4s Time] [2022-07-21 17:31:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-21 17:31:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 180. [2022-07-21 17:31:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 179 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2022-07-21 17:31:09,096 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 31 [2022-07-21 17:31:09,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:31:09,096 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2022-07-21 17:31:09,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2022-07-21 17:31:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:31:09,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:31:09,097 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-21 17:31:09,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:31:09,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 17:31:09,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:31:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:31:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash -557177016, now seen corresponding path program 1 times [2022-07-21 17:31:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:31:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107292738] [2022-07-21 17:31:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:31:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:09,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:31:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107292738] [2022-07-21 17:31:09,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107292738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:31:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66419820] [2022-07-21 17:31:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:31:09,471 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) [2022-07-21 17:31:09,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:31:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:09,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 17:31:09,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:31:09,560 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 [2022-07-21 17:31:09,603 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:31:09,604 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 [2022-07-21 17:31:09,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:31:09,629 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 [2022-07-21 17:31:09,635 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 [2022-07-21 17:31:09,711 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:09,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:31:09,715 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 18 treesize of output 20 [2022-07-21 17:31:09,775 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:31:09,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 20 [2022-07-21 17:31:09,787 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 5 treesize of output 3 [2022-07-21 17:31:09,797 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:09,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 29 [2022-07-21 17:31:09,832 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:09,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:31:09,835 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 18 treesize of output 20 [2022-07-21 17:31:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:31:09,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-21 17:31:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:31:09,944 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 31 treesize of output 26 [2022-07-21 17:31:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:09,965 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:31:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:09,969 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:09,970 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-21 17:31:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:09,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:31:10,168 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int)) (v_ArrVal_817 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_89| Int)) (or (< |v_ULTIMATE.start_main_~x~0#1.offset_89| 0) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_818) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_89|))) (and (<= (+ .cse0 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_817) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_89|))) (<= 0 (+ .cse0 8)))) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_89| |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-07-21 17:31:10,395 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_814 (Array Int Int)) (v_ArrVal_813 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_89| Int)) (or (< |v_ULTIMATE.start_main_~x~0#1.offset_89| 0) (and (forall ((v_ArrVal_818 (Array Int Int)) (v_ArrVal_817 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_814))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_813) .cse0 v_ArrVal_818) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_89|) 12) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_817) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_89|)))))) (forall ((v_ArrVal_818 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_813) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_814) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_818) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_89|) 8)))) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_89| |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-07-21 17:31:10,509 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:10,510 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2022-07-21 17:31:10,514 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:10,514 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-07-21 17:31:10,517 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 54 treesize of output 46 [2022-07-21 17:31:10,524 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:10,524 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 181 [2022-07-21 17:31:10,529 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 138 treesize of output 134 [2022-07-21 17:31:10,533 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 162 treesize of output 152 [2022-07-21 17:31:10,536 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 126 treesize of output 114 [2022-07-21 17:31:10,601 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:10,602 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2022-07-21 17:31:10,607 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:10,607 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2022-07-21 17:31:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:10,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2022-07-21 17:31:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:10,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-07-21 17:31:10,617 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 13 treesize of output 11 [2022-07-21 17:31:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:10,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66419820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:31:10,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:31:10,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 14] total 34 [2022-07-21 17:31:10,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424074460] [2022-07-21 17:31:10,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:31:10,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:31:10,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:31:10,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:31:10,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=917, Unknown=13, NotChecked=126, Total=1190 [2022-07-21 17:31:10,820 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 35 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:31:11,696 INFO L93 Difference]: Finished difference Result 368 states and 410 transitions. [2022-07-21 17:31:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:31:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 17:31:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:31:11,698 INFO L225 Difference]: With dead ends: 368 [2022-07-21 17:31:11,698 INFO L226 Difference]: Without dead ends: 368 [2022-07-21 17:31:11,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=1578, Unknown=13, NotChecked=170, Total=2070 [2022-07-21 17:31:11,699 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 546 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1173 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:31:11,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1023 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1148 Invalid, 0 Unknown, 1173 Unchecked, 0.5s Time] [2022-07-21 17:31:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-21 17:31:11,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 180. [2022-07-21 17:31:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.34640522875817) internal successors, (206), 179 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-07-21 17:31:11,702 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 31 [2022-07-21 17:31:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:31:11,702 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-07-21 17:31:11,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-07-21 17:31:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:31:11,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:31:11,703 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-07-21 17:31:11,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:31:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:11,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:31:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:31:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1435398869, now seen corresponding path program 1 times [2022-07-21 17:31:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:31:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993258005] [2022-07-21 17:31:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:11,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:31:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:31:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:31:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993258005] [2022-07-21 17:31:11,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993258005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:31:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848948283] [2022-07-21 17:31:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:11,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:31:11,979 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) [2022-07-21 17:31:12,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:31:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:31:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:31:12,144 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 25 treesize of output 17 [2022-07-21 17:31:12,146 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 21 treesize of output 13 [2022-07-21 17:31:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:31:12,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:31:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:31:12,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848948283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:31:12,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:31:12,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 15 [2022-07-21 17:31:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885090802] [2022-07-21 17:31:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:31:12,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:31:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:31:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:31:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:31:12,265 INFO L87 Difference]: Start difference. First operand 180 states and 206 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:31:12,665 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2022-07-21 17:31:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:31:12,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 17:31:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:31:12,666 INFO L225 Difference]: With dead ends: 184 [2022-07-21 17:31:12,666 INFO L226 Difference]: Without dead ends: 184 [2022-07-21 17:31:12,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:31:12,667 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 270 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:31:12,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 278 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:31:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-21 17:31:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2022-07-21 17:31:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 143 states have (on average 1.3216783216783217) internal successors, (189), 167 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2022-07-21 17:31:12,670 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 34 [2022-07-21 17:31:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:31:12,671 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2022-07-21 17:31:12,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2022-07-21 17:31:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:31:12,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:31:12,671 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:31:12,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 17:31:12,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:12,889 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:31:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:31:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash -605799936, now seen corresponding path program 1 times [2022-07-21 17:31:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:31:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299075203] [2022-07-21 17:31:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:12,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:31:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:13,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:31:13,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299075203] [2022-07-21 17:31:13,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299075203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:31:13,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343357729] [2022-07-21 17:31:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:31:13,049 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) [2022-07-21 17:31:13,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:31:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 17:31:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:31:13,256 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:31:13,256 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 [2022-07-21 17:31:13,291 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 [2022-07-21 17:31:13,378 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:13,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:31:13,466 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:13,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 29 [2022-07-21 17:31:13,483 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:13,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:31:13,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:13,553 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:31:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:13,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:31:13,881 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:13,881 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-07-21 17:31:13,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:13,887 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 131 [2022-07-21 17:31:13,913 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:13,913 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 116 treesize of output 114 [2022-07-21 17:31:13,917 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 106 treesize of output 102 [2022-07-21 17:31:16,332 INFO L356 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2022-07-21 17:31:16,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 68 [2022-07-21 17:31:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:16,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343357729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:31:16,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:31:16,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 36 [2022-07-21 17:31:16,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230966017] [2022-07-21 17:31:16,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:31:16,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 17:31:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:31:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 17:31:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1142, Unknown=22, NotChecked=0, Total=1332 [2022-07-21 17:31:16,417 INFO L87 Difference]: Start difference. First operand 168 states and 189 transitions. Second operand has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:31:16,904 INFO L93 Difference]: Finished difference Result 237 states and 263 transitions. [2022-07-21 17:31:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:31:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-21 17:31:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:31:16,905 INFO L225 Difference]: With dead ends: 237 [2022-07-21 17:31:16,905 INFO L226 Difference]: Without dead ends: 237 [2022-07-21 17:31:16,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1572, Unknown=22, NotChecked=0, Total=1892 [2022-07-21 17:31:16,906 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 355 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 986 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:31:16,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 890 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 780 Invalid, 0 Unknown, 986 Unchecked, 0.3s Time] [2022-07-21 17:31:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-21 17:31:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2022-07-21 17:31:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 176 states have (on average 1.2897727272727273) internal successors, (227), 200 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2022-07-21 17:31:16,910 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 36 [2022-07-21 17:31:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:31:16,910 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2022-07-21 17:31:16,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2022-07-21 17:31:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:31:16,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:31:16,911 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:31:16,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:31:17,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:17,131 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:31:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:31:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash -605799935, now seen corresponding path program 1 times [2022-07-21 17:31:17,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:31:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944835853] [2022-07-21 17:31:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:17,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:31:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:17,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:31:17,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944835853] [2022-07-21 17:31:17,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944835853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:31:17,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904871560] [2022-07-21 17:31:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:17,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:17,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:31:17,305 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) [2022-07-21 17:31:17,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:31:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 17:31:17,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:31:17,515 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 [2022-07-21 17:31:17,540 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:31:17,540 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 [2022-07-21 17:31:17,574 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 [2022-07-21 17:31:17,578 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 [2022-07-21 17:31:17,666 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:17,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:31:17,669 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 18 treesize of output 20 [2022-07-21 17:31:17,757 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:17,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 29 [2022-07-21 17:31:17,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:31:17,762 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 14 treesize of output 16 [2022-07-21 17:31:17,781 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:17,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:31:17,785 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 18 treesize of output 20 [2022-07-21 17:31:17,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:17,858 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:31:17,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:17,864 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:17,864 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-21 17:31:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:17,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:31:18,084 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1187 (Array Int Int)) (v_ArrVal_1186 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_103| Int)) (or (not (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_103|)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1187) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_103|))) (and (<= 0 .cse0) (<= (+ .cse0 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1186) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_103|))))) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_103| |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-07-21 17:31:18,343 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_103| Int) (v_ArrVal_1183 (Array Int Int)) (v_ArrVal_1182 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_103|)) (and (forall ((v_ArrVal_1187 (Array Int Int)) (v_ArrVal_1186 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem12#1.base| v_ArrVal_1183))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem12#1.base| v_ArrVal_1182) .cse0 v_ArrVal_1187) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_103|) 4) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_1186) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_103|)))))) (forall ((v_ArrVal_1187 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem12#1.base| v_ArrVal_1182) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem12#1.base| v_ArrVal_1183) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1187) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_103|)))) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_103| |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-07-21 17:31:18,494 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:18,494 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-07-21 17:31:18,498 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:18,498 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:31:18,501 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 50 treesize of output 42 [2022-07-21 17:31:18,507 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:18,508 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 99 [2022-07-21 17:31:18,511 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 60 treesize of output 52 [2022-07-21 17:31:18,514 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 76 treesize of output 70 [2022-07-21 17:31:18,517 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 46 [2022-07-21 17:31:18,571 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:18,572 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2022-07-21 17:31:18,576 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:18,577 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2022-07-21 17:31:18,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:18,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:18,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2022-07-21 17:31:18,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:18,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-07-21 17:31:18,586 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 13 treesize of output 11 [2022-07-21 17:31:18,890 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:31:18,890 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 13 treesize of output 12 [2022-07-21 17:31:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:18,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904871560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:31:18,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:31:18,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16] total 40 [2022-07-21 17:31:18,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220804330] [2022-07-21 17:31:18,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:31:18,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:31:18,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:31:18,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:31:18,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1318, Unknown=28, NotChecked=150, Total=1640 [2022-07-21 17:31:18,957 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 41 states, 40 states have (on average 2.475) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:31:20,026 INFO L93 Difference]: Finished difference Result 301 states and 330 transitions. [2022-07-21 17:31:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:31:20,028 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-21 17:31:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:31:20,029 INFO L225 Difference]: With dead ends: 301 [2022-07-21 17:31:20,029 INFO L226 Difference]: Without dead ends: 301 [2022-07-21 17:31:20,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=2650, Unknown=29, NotChecked=218, Total=3306 [2022-07-21 17:31:20,030 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 409 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:31:20,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1055 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1273 Invalid, 0 Unknown, 796 Unchecked, 0.5s Time] [2022-07-21 17:31:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-07-21 17:31:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 200. [2022-07-21 17:31:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 175 states have (on average 1.2857142857142858) internal successors, (225), 199 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2022-07-21 17:31:20,034 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 36 [2022-07-21 17:31:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:31:20,034 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2022-07-21 17:31:20,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:31:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2022-07-21 17:31:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:31:20,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:31:20,034 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:31:20,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:31:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:20,247 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-07-21 17:31:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:31:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1311673304, now seen corresponding path program 2 times [2022-07-21 17:31:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:31:20,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736276243] [2022-07-21 17:31:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:31:20,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:31:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:31:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:20,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:31:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736276243] [2022-07-21 17:31:20,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736276243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:31:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268872254] [2022-07-21 17:31:20,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:31:20,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:31:20,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:31:20,569 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) [2022-07-21 17:31:20,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:31:20,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:31:20,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:31:20,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 17:31:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:31:20,685 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 [2022-07-21 17:31:20,742 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:31:20,742 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 [2022-07-21 17:31:20,768 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 [2022-07-21 17:31:20,774 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 [2022-07-21 17:31:20,832 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:31:20,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-07-21 17:31:20,836 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 18 treesize of output 20 [2022-07-21 17:31:20,917 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-21 17:31:20,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 21 [2022-07-21 17:31:20,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:20,930 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-21 17:31:20,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 22 [2022-07-21 17:31:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:31:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:31:20,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:20,980 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:31:20,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2022-07-21 17:31:20,988 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-07-21 17:31:20,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2022-07-21 17:31:21,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:21,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:21,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:21,253 INFO L356 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-07-21 17:31:21,253 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 5 case distinctions, treesize of input 69 treesize of output 42 [2022-07-21 17:31:21,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:31:21,260 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:31:21,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-07-21 17:31:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:31:21,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:31:29,596 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:29,596 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 245 [2022-07-21 17:31:29,636 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:29,636 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 3764 treesize of output 3700 [2022-07-21 17:31:29,661 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:31:29,661 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 8862 treesize of output 8606