./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/memsafety-ext/tree_parent_ptr.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 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:58:09,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:58:09,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:58:09,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:58:09,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:58:09,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:58:09,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:58:09,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:58:09,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:58:09,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:58:09,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:58:09,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:58:09,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:58:09,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:58:09,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:58:09,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:58:09,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:58:09,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:58:09,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:58:09,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:58:10,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:58:10,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:58:10,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:58:10,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:58:10,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:58:10,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:58:10,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:58:10,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:58:10,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:58:10,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:58:10,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:58:10,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:58:10,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:58:10,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:58:10,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:58:10,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:58:10,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:58:10,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:58:10,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:58:10,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:58:10,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:58:10,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 02:58:10,033 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:58:10,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:58:10,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:58:10,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:58:10,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:58:10,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:58:10,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:58:10,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:58:10,044 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:58:10,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:58:10,045 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:58:10,045 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 02:58:10,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:58:10,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:58:10,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:58:10,046 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 02:58:10,046 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 02:58:10,046 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 02:58:10,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:58:10,046 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 02:58:10,046 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:58:10,047 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:58:10,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:58:10,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:58:10,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:58:10,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:58:10,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:58:10,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:58:10,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:58:10,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:58:10,048 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:58:10,048 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:58:10,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:58:10,049 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:58:10,049 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 [2023-02-17 02:58:10,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:58:10,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:58:10,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:58:10,361 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:58:10,361 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:58:10,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2023-02-17 02:58:11,471 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:58:11,701 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:58:11,707 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2023-02-17 02:58:11,719 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe0c72082/403d74e4e6854253a3f7faea130a6f8c/FLAG7194af8cc [2023-02-17 02:58:11,733 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe0c72082/403d74e4e6854253a3f7faea130a6f8c [2023-02-17 02:58:11,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:58:11,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:58:11,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:58:11,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:58:11,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:58:11,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:58:11" (1/1) ... [2023-02-17 02:58:11,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9d722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:11, skipping insertion in model container [2023-02-17 02:58:11,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:58:11" (1/1) ... [2023-02-17 02:58:11,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:58:11,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:58:12,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:58:12,026 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:58:12,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:58:12,109 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:58:12,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12 WrapperNode [2023-02-17 02:58:12,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:58:12,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:58:12,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:58:12,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:58:12,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,164 INFO L138 Inliner]: procedures = 123, calls = 49, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 149 [2023-02-17 02:58:12,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:58:12,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:58:12,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:58:12,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:58:12,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,207 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:58:12,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:58:12,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:58:12,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:58:12,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (1/1) ... [2023-02-17 02:58:12,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:58:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:58:12,285 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) [2023-02-17 02:58:12,298 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 [2023-02-17 02:58:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 02:58:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:58:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 02:58:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 02:58:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 02:58:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:58:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:58:12,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:58:12,456 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:58:12,463 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:58:12,822 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:58:12,832 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:58:12,833 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 02:58:12,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:58:12 BoogieIcfgContainer [2023-02-17 02:58:12,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:58:12,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:58:12,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:58:12,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:58:12,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:58:11" (1/3) ... [2023-02-17 02:58:12,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f50a0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:58:12, skipping insertion in model container [2023-02-17 02:58:12,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:58:12" (2/3) ... [2023-02-17 02:58:12,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f50a0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:58:12, skipping insertion in model container [2023-02-17 02:58:12,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:58:12" (3/3) ... [2023-02-17 02:58:12,842 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_parent_ptr.i [2023-02-17 02:58:12,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:58:12,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2023-02-17 02:58:12,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:58:12,901 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59e46d9e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:58:12,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-02-17 02:58:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 77 states have (on average 2.1818181818181817) internal successors, (168), 154 states have internal predecessors, (168), 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) [2023-02-17 02:58:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-17 02:58:12,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:12,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-17 02:58:12,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-17 02:58:12,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:12,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436054403] [2023-02-17 02:58:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:13,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436054403] [2023-02-17 02:58:13,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436054403] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:13,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:13,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:58:13,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381909879] [2023-02-17 02:58:13,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:58:13,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:58:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:13,156 INFO L87 Difference]: Start difference. First operand has 155 states, 77 states have (on average 2.1818181818181817) internal successors, (168), 154 states have internal predecessors, (168), 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) [2023-02-17 02:58:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:13,348 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2023-02-17 02:58:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:58:13,350 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 [2023-02-17 02:58:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:13,360 INFO L225 Difference]: With dead ends: 172 [2023-02-17 02:58:13,360 INFO L226 Difference]: Without dead ends: 168 [2023-02-17 02:58:13,362 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 [2023-02-17 02:58:13,366 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 120 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:13,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 128 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-17 02:58:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2023-02-17 02:58:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 149 states have internal predecessors, (160), 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) [2023-02-17 02:58:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2023-02-17 02:58:13,396 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 3 [2023-02-17 02:58:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:13,396 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2023-02-17 02:58:13,396 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) [2023-02-17 02:58:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2023-02-17 02:58:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-17 02:58:13,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:13,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-17 02:58:13,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 02:58:13,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-17 02:58:13,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:13,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534207938] [2023-02-17 02:58:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:13,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:13,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534207938] [2023-02-17 02:58:13,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534207938] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:13,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:13,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:58:13,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421625794] [2023-02-17 02:58:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:13,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:58:13,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:58:13,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:13,473 INFO L87 Difference]: Start difference. First operand 150 states and 160 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) [2023-02-17 02:58:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:13,622 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2023-02-17 02:58:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:58:13,623 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 [2023-02-17 02:58:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:13,628 INFO L225 Difference]: With dead ends: 147 [2023-02-17 02:58:13,629 INFO L226 Difference]: Without dead ends: 147 [2023-02-17 02:58:13,633 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 [2023-02-17 02:58:13,635 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 92 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:13,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 144 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-17 02:58:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-17 02:58:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 146 states have internal predecessors, (157), 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) [2023-02-17 02:58:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2023-02-17 02:58:13,658 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 3 [2023-02-17 02:58:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:13,658 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2023-02-17 02:58:13,659 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) [2023-02-17 02:58:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2023-02-17 02:58:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:58:13,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:13,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:13,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 02:58:13,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash 59265651, now seen corresponding path program 1 times [2023-02-17 02:58:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:13,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971711574] [2023-02-17 02:58:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:13,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:13,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971711574] [2023-02-17 02:58:13,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971711574] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:13,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:13,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:58:13,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40730523] [2023-02-17 02:58:13,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:13,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:58:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:58:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:58:13,786 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:13,941 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2023-02-17 02:58:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:58:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 02:58:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:13,943 INFO L225 Difference]: With dead ends: 153 [2023-02-17 02:58:13,943 INFO L226 Difference]: Without dead ends: 153 [2023-02-17 02:58:13,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:13,949 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 198 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:13,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 100 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-17 02:58:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2023-02-17 02:58:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.844155844155844) internal successors, (142), 130 states have internal predecessors, (142), 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) [2023-02-17 02:58:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2023-02-17 02:58:13,968 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 8 [2023-02-17 02:58:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:13,974 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2023-02-17 02:58:13,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2023-02-17 02:58:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:58:13,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:13,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:13,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 02:58:13,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:13,977 INFO L85 PathProgramCache]: Analyzing trace with hash 59265652, now seen corresponding path program 1 times [2023-02-17 02:58:13,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:13,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585228605] [2023-02-17 02:58:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:13,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:14,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585228605] [2023-02-17 02:58:14,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585228605] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:14,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:14,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:58:14,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849738355] [2023-02-17 02:58:14,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:14,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:58:14,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:58:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:58:14,124 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:14,303 INFO L93 Difference]: Finished difference Result 186 states and 204 transitions. [2023-02-17 02:58:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:58:14,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 02:58:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:14,306 INFO L225 Difference]: With dead ends: 186 [2023-02-17 02:58:14,306 INFO L226 Difference]: Without dead ends: 186 [2023-02-17 02:58:14,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:14,307 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 191 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:14,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 180 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-17 02:58:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 167. [2023-02-17 02:58:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 113 states have (on average 1.7168141592920354) internal successors, (194), 166 states have internal predecessors, (194), 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) [2023-02-17 02:58:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2023-02-17 02:58:14,313 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 8 [2023-02-17 02:58:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:14,314 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2023-02-17 02:58:14,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2023-02-17 02:58:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 02:58:14,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:14,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:14,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 02:58:14,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1837237128, now seen corresponding path program 1 times [2023-02-17 02:58:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:14,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771901868] [2023-02-17 02:58:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:14,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:14,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771901868] [2023-02-17 02:58:14,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771901868] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:14,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:14,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:58:14,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861387996] [2023-02-17 02:58:14,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:14,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:58:14,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:58:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:14,373 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-02-17 02:58:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:14,451 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2023-02-17 02:58:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:58:14,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2023-02-17 02:58:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:14,453 INFO L225 Difference]: With dead ends: 171 [2023-02-17 02:58:14,453 INFO L226 Difference]: Without dead ends: 171 [2023-02-17 02:58:14,453 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 [2023-02-17 02:58:14,454 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:14,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 199 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-17 02:58:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2023-02-17 02:58:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 166 states have internal predecessors, (196), 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) [2023-02-17 02:58:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2023-02-17 02:58:14,459 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 9 [2023-02-17 02:58:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:14,460 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2023-02-17 02:58:14,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-02-17 02:58:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2023-02-17 02:58:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 02:58:14,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:14,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 02:58:14,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:14,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1837237129, now seen corresponding path program 1 times [2023-02-17 02:58:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:14,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101547971] [2023-02-17 02:58:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:14,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:14,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101547971] [2023-02-17 02:58:14,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101547971] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:14,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:14,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:58:14,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479225640] [2023-02-17 02:58:14,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:14,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:58:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:14,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:58:14,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:14,542 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-02-17 02:58:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:14,624 INFO L93 Difference]: Finished difference Result 169 states and 196 transitions. [2023-02-17 02:58:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:58:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2023-02-17 02:58:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:14,626 INFO L225 Difference]: With dead ends: 169 [2023-02-17 02:58:14,626 INFO L226 Difference]: Without dead ends: 169 [2023-02-17 02:58:14,626 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 [2023-02-17 02:58:14,627 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:14,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-17 02:58:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2023-02-17 02:58:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 115 states have (on average 1.6782608695652175) internal successors, (193), 164 states have internal predecessors, (193), 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) [2023-02-17 02:58:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 193 transitions. [2023-02-17 02:58:14,632 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 193 transitions. Word has length 9 [2023-02-17 02:58:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:14,633 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 193 transitions. [2023-02-17 02:58:14,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-02-17 02:58:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 193 transitions. [2023-02-17 02:58:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 02:58:14,634 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:14,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:14,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 02:58:14,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash 243138738, now seen corresponding path program 1 times [2023-02-17 02:58:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:14,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386017490] [2023-02-17 02:58:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:14,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:14,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386017490] [2023-02-17 02:58:14,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386017490] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:14,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:14,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:58:14,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468282159] [2023-02-17 02:58:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:58:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:14,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:58:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:14,672 INFO L87 Difference]: Start difference. First operand 165 states and 193 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:14,688 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2023-02-17 02:58:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:58:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-17 02:58:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:14,689 INFO L225 Difference]: With dead ends: 166 [2023-02-17 02:58:14,689 INFO L226 Difference]: Without dead ends: 166 [2023-02-17 02:58:14,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:14,690 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:14,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 254 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:58:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-02-17 02:58:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2023-02-17 02:58:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 115 states have (on average 1.6695652173913043) internal successors, (192), 164 states have internal predecessors, (192), 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) [2023-02-17 02:58:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2023-02-17 02:58:14,694 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 13 [2023-02-17 02:58:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:14,695 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2023-02-17 02:58:14,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2023-02-17 02:58:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 02:58:14,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:14,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:14,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 02:58:14,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:14,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1052634445, now seen corresponding path program 1 times [2023-02-17 02:58:14,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:14,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248766820] [2023-02-17 02:58:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:14,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248766820] [2023-02-17 02:58:14,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248766820] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:14,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:14,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:14,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421353872] [2023-02-17 02:58:14,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:14,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:14,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:14,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:14,778 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-02-17 02:58:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:14,931 INFO L93 Difference]: Finished difference Result 178 states and 206 transitions. [2023-02-17 02:58:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:58:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2023-02-17 02:58:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:14,932 INFO L225 Difference]: With dead ends: 178 [2023-02-17 02:58:14,932 INFO L226 Difference]: Without dead ends: 178 [2023-02-17 02:58:14,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:14,934 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 33 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:14,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 304 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-17 02:58:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 162. [2023-02-17 02:58:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 117 states have (on average 1.623931623931624) internal successors, (190), 161 states have internal predecessors, (190), 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) [2023-02-17 02:58:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2023-02-17 02:58:14,941 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 14 [2023-02-17 02:58:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:14,941 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2023-02-17 02:58:14,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-02-17 02:58:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2023-02-17 02:58:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 02:58:14,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:14,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:14,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 02:58:14,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1052634444, now seen corresponding path program 1 times [2023-02-17 02:58:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:14,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015365432] [2023-02-17 02:58:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:14,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:15,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:15,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015365432] [2023-02-17 02:58:15,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015365432] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:15,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:15,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:58:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404658520] [2023-02-17 02:58:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:15,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:58:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:58:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:58:15,038 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-02-17 02:58:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:15,256 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2023-02-17 02:58:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:58:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2023-02-17 02:58:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:15,257 INFO L225 Difference]: With dead ends: 201 [2023-02-17 02:58:15,257 INFO L226 Difference]: Without dead ends: 201 [2023-02-17 02:58:15,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:58:15,258 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 52 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:15,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-17 02:58:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 169. [2023-02-17 02:58:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 128 states have (on average 1.5859375) internal successors, (203), 168 states have internal predecessors, (203), 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) [2023-02-17 02:58:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 203 transitions. [2023-02-17 02:58:15,262 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 203 transitions. Word has length 14 [2023-02-17 02:58:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:15,262 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 203 transitions. [2023-02-17 02:58:15,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-02-17 02:58:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 203 transitions. [2023-02-17 02:58:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 02:58:15,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:15,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:15,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 02:58:15,263 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash 395262676, now seen corresponding path program 1 times [2023-02-17 02:58:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:15,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75851531] [2023-02-17 02:58:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:15,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:15,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75851531] [2023-02-17 02:58:15,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75851531] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:15,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:15,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:58:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675867007] [2023-02-17 02:58:15,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:15,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:58:15,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:58:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:15,286 INFO L87 Difference]: Start difference. First operand 169 states and 203 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2023-02-17 02:58:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:15,293 INFO L93 Difference]: Finished difference Result 171 states and 205 transitions. [2023-02-17 02:58:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:58:15,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2023-02-17 02:58:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:15,295 INFO L225 Difference]: With dead ends: 171 [2023-02-17 02:58:15,295 INFO L226 Difference]: Without dead ends: 171 [2023-02-17 02:58:15,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:58:15,296 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:15,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 246 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:58:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-17 02:58:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-02-17 02:58:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 130 states have (on average 1.5769230769230769) internal successors, (205), 170 states have internal predecessors, (205), 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) [2023-02-17 02:58:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2023-02-17 02:58:15,300 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 15 [2023-02-17 02:58:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:15,300 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2023-02-17 02:58:15,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2023-02-17 02:58:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2023-02-17 02:58:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 02:58:15,301 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:15,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:15,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 02:58:15,302 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:15,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1476383815, now seen corresponding path program 1 times [2023-02-17 02:58:15,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:15,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586975905] [2023-02-17 02:58:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:15,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586975905] [2023-02-17 02:58:15,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586975905] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:15,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:15,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:15,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802282628] [2023-02-17 02:58:15,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:15,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:15,348 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:15,411 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2023-02-17 02:58:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:58:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 02:58:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:15,412 INFO L225 Difference]: With dead ends: 185 [2023-02-17 02:58:15,412 INFO L226 Difference]: Without dead ends: 185 [2023-02-17 02:58:15,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:58:15,413 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 60 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:15,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 309 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-17 02:58:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2023-02-17 02:58:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 171 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) [2023-02-17 02:58:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 206 transitions. [2023-02-17 02:58:15,417 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 206 transitions. Word has length 17 [2023-02-17 02:58:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:15,418 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 206 transitions. [2023-02-17 02:58:15,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 206 transitions. [2023-02-17 02:58:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 02:58:15,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:15,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:15,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 02:58:15,419 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1645245929, now seen corresponding path program 1 times [2023-02-17 02:58:15,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959000125] [2023-02-17 02:58:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:15,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:15,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:15,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959000125] [2023-02-17 02:58:15,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959000125] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:15,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:15,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:58:15,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964177553] [2023-02-17 02:58:15,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:15,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:58:15,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:58:15,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:58:15,604 INFO L87 Difference]: Start difference. First operand 172 states and 206 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:15,747 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2023-02-17 02:58:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:58:15,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 02:58:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:15,749 INFO L225 Difference]: With dead ends: 209 [2023-02-17 02:58:15,749 INFO L226 Difference]: Without dead ends: 209 [2023-02-17 02:58:15,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:58:15,750 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 52 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:15,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 477 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-02-17 02:58:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 186. [2023-02-17 02:58:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 145 states have (on average 1.5517241379310345) internal successors, (225), 185 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) [2023-02-17 02:58:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2023-02-17 02:58:15,753 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 17 [2023-02-17 02:58:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:15,753 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2023-02-17 02:58:15,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2023-02-17 02:58:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 02:58:15,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:15,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:15,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 02:58:15,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1465631940, now seen corresponding path program 1 times [2023-02-17 02:58:15,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:15,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592236250] [2023-02-17 02:58:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:15,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:16,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592236250] [2023-02-17 02:58:16,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592236250] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:16,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:16,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 02:58:16,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427688073] [2023-02-17 02:58:16,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 02:58:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:16,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 02:58:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-17 02:58:16,121 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:16,610 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2023-02-17 02:58:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:58:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-17 02:58:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:16,611 INFO L225 Difference]: With dead ends: 207 [2023-02-17 02:58:16,611 INFO L226 Difference]: Without dead ends: 207 [2023-02-17 02:58:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-17 02:58:16,612 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 275 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:16,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 383 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:58:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-17 02:58:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2023-02-17 02:58:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 150 states have (on average 1.54) internal successors, (231), 190 states have internal predecessors, (231), 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) [2023-02-17 02:58:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2023-02-17 02:58:16,616 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 19 [2023-02-17 02:58:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:16,616 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2023-02-17 02:58:16,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2023-02-17 02:58:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 02:58:16,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:16,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:16,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-17 02:58:16,620 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:16,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1465631939, now seen corresponding path program 1 times [2023-02-17 02:58:16,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:16,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681939559] [2023-02-17 02:58:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:16,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:16,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681939559] [2023-02-17 02:58:16,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681939559] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:16,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:16,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 02:58:16,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863074195] [2023-02-17 02:58:16,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:16,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 02:58:16,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 02:58:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:58:16,901 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:17,411 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2023-02-17 02:58:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:58:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-17 02:58:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:17,413 INFO L225 Difference]: With dead ends: 260 [2023-02-17 02:58:17,413 INFO L226 Difference]: Without dead ends: 260 [2023-02-17 02:58:17,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-17 02:58:17,414 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 435 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:17,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 364 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:58:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-17 02:58:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2023-02-17 02:58:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 154 states have (on average 1.5324675324675325) internal successors, (236), 194 states have internal predecessors, (236), 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) [2023-02-17 02:58:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2023-02-17 02:58:17,418 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 19 [2023-02-17 02:58:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:17,418 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2023-02-17 02:58:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2023-02-17 02:58:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 02:58:17,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:17,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:17,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 02:58:17,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -825042817, now seen corresponding path program 1 times [2023-02-17 02:58:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:17,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221790334] [2023-02-17 02:58:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:17,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:17,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:17,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221790334] [2023-02-17 02:58:17,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221790334] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:17,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:17,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:17,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053308310] [2023-02-17 02:58:17,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:17,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:17,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:17,489 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:17,606 INFO L93 Difference]: Finished difference Result 194 states and 234 transitions. [2023-02-17 02:58:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:58:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-17 02:58:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:17,613 INFO L225 Difference]: With dead ends: 194 [2023-02-17 02:58:17,614 INFO L226 Difference]: Without dead ends: 194 [2023-02-17 02:58:17,614 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 [2023-02-17 02:58:17,615 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 7 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:17,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 302 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-17 02:58:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-02-17 02:58:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 154 states have (on average 1.5194805194805194) internal successors, (234), 193 states have internal predecessors, (234), 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) [2023-02-17 02:58:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 234 transitions. [2023-02-17 02:58:17,618 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 234 transitions. Word has length 19 [2023-02-17 02:58:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:17,619 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 234 transitions. [2023-02-17 02:58:17,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 234 transitions. [2023-02-17 02:58:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 02:58:17,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:17,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 02:58:17,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash -825042816, now seen corresponding path program 1 times [2023-02-17 02:58:17,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:17,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961418779] [2023-02-17 02:58:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:17,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:17,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:17,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961418779] [2023-02-17 02:58:17,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961418779] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:17,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:17,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:17,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725363723] [2023-02-17 02:58:17,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:17,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:17,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:17,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:17,791 INFO L87 Difference]: Start difference. First operand 194 states and 234 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:17,931 INFO L93 Difference]: Finished difference Result 193 states and 232 transitions. [2023-02-17 02:58:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:58:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-17 02:58:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:17,932 INFO L225 Difference]: With dead ends: 193 [2023-02-17 02:58:17,932 INFO L226 Difference]: Without dead ends: 193 [2023-02-17 02:58:17,933 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 [2023-02-17 02:58:17,933 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 5 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:17,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 280 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-17 02:58:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-17 02:58:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 154 states have (on average 1.5064935064935066) internal successors, (232), 192 states have internal predecessors, (232), 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) [2023-02-17 02:58:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 232 transitions. [2023-02-17 02:58:17,937 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 232 transitions. Word has length 19 [2023-02-17 02:58:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:17,938 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 232 transitions. [2023-02-17 02:58:17,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 232 transitions. [2023-02-17 02:58:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 02:58:17,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:17,938 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] [2023-02-17 02:58:17,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 02:58:17,939 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -3442432, now seen corresponding path program 1 times [2023-02-17 02:58:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784910836] [2023-02-17 02:58:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:18,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:18,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784910836] [2023-02-17 02:58:18,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784910836] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:18,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:18,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:58:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486297210] [2023-02-17 02:58:18,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:58:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:58:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:58:18,008 INFO L87 Difference]: Start difference. First operand 193 states and 232 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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) [2023-02-17 02:58:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:18,097 INFO L93 Difference]: Finished difference Result 189 states and 229 transitions. [2023-02-17 02:58:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:58:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 [2023-02-17 02:58:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:18,099 INFO L225 Difference]: With dead ends: 189 [2023-02-17 02:58:18,099 INFO L226 Difference]: Without dead ends: 189 [2023-02-17 02:58:18,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:58:18,100 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 169 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:18,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 81 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-17 02:58:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2023-02-17 02:58:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 184 states have internal predecessors, (224), 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) [2023-02-17 02:58:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2023-02-17 02:58:18,104 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 22 [2023-02-17 02:58:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:18,104 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2023-02-17 02:58:18,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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) [2023-02-17 02:58:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2023-02-17 02:58:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 02:58:18,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:18,105 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] [2023-02-17 02:58:18,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 02:58:18,105 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1247328411, now seen corresponding path program 1 times [2023-02-17 02:58:18,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:18,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512436628] [2023-02-17 02:58:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:18,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:18,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512436628] [2023-02-17 02:58:18,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512436628] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:18,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:18,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:58:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537701708] [2023-02-17 02:58:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:18,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:58:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:58:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:58:18,242 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2023-02-17 02:58:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:18,428 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2023-02-17 02:58:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:58:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 [2023-02-17 02:58:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:18,430 INFO L225 Difference]: With dead ends: 187 [2023-02-17 02:58:18,430 INFO L226 Difference]: Without dead ends: 187 [2023-02-17 02:58:18,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:58:18,431 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 157 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:18,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 234 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-17 02:58:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2023-02-17 02:58:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.4509803921568627) internal successors, (222), 183 states have internal predecessors, (222), 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) [2023-02-17 02:58:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 222 transitions. [2023-02-17 02:58:18,434 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 222 transitions. Word has length 22 [2023-02-17 02:58:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:18,434 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 222 transitions. [2023-02-17 02:58:18,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2023-02-17 02:58:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 222 transitions. [2023-02-17 02:58:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 02:58:18,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:18,435 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] [2023-02-17 02:58:18,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 02:58:18,435 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1247328412, now seen corresponding path program 1 times [2023-02-17 02:58:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465781552] [2023-02-17 02:58:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:18,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:18,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:18,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465781552] [2023-02-17 02:58:18,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465781552] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:18,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:18,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:58:18,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846850376] [2023-02-17 02:58:18,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:58:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:58:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:58:18,624 INFO L87 Difference]: Start difference. First operand 184 states and 222 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2023-02-17 02:58:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:18,899 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2023-02-17 02:58:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:58:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 [2023-02-17 02:58:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:18,901 INFO L225 Difference]: With dead ends: 186 [2023-02-17 02:58:18,901 INFO L226 Difference]: Without dead ends: 186 [2023-02-17 02:58:18,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:58:18,902 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 151 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:18,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 306 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-17 02:58:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2023-02-17 02:58:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 182 states have internal predecessors, (220), 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) [2023-02-17 02:58:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2023-02-17 02:58:18,905 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 22 [2023-02-17 02:58:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:18,905 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2023-02-17 02:58:18,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2023-02-17 02:58:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2023-02-17 02:58:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 02:58:18,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:18,906 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] [2023-02-17 02:58:18,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-17 02:58:18,906 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -19499741, now seen corresponding path program 1 times [2023-02-17 02:58:18,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:18,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195526447] [2023-02-17 02:58:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:18,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:18,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195526447] [2023-02-17 02:58:18,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195526447] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:18,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:18,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900097565] [2023-02-17 02:58:18,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:18,973 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-02-17 02:58:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:19,083 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2023-02-17 02:58:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:58:19,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 23 [2023-02-17 02:58:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:19,084 INFO L225 Difference]: With dead ends: 182 [2023-02-17 02:58:19,084 INFO L226 Difference]: Without dead ends: 182 [2023-02-17 02:58:19,084 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 [2023-02-17 02:58:19,085 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 7 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:19,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 271 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-17 02:58:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-02-17 02:58:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 153 states have (on average 1.4248366013071896) internal successors, (218), 181 states have internal predecessors, (218), 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) [2023-02-17 02:58:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2023-02-17 02:58:19,088 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 23 [2023-02-17 02:58:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:19,088 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2023-02-17 02:58:19,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-02-17 02:58:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2023-02-17 02:58:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 02:58:19,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:19,089 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] [2023-02-17 02:58:19,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-17 02:58:19,089 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:19,090 INFO L85 PathProgramCache]: Analyzing trace with hash -19499740, now seen corresponding path program 1 times [2023-02-17 02:58:19,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:19,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539729219] [2023-02-17 02:58:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:19,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:19,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:19,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539729219] [2023-02-17 02:58:19,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539729219] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:19,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:19,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:19,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146035062] [2023-02-17 02:58:19,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:19,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:19,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:19,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:19,237 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-02-17 02:58:19,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:19,357 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2023-02-17 02:58:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:58:19,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 23 [2023-02-17 02:58:19,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:19,358 INFO L225 Difference]: With dead ends: 181 [2023-02-17 02:58:19,358 INFO L226 Difference]: Without dead ends: 181 [2023-02-17 02:58:19,359 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 [2023-02-17 02:58:19,359 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 5 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:19,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 263 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-17 02:58:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-17 02:58:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 153 states have (on average 1.411764705882353) internal successors, (216), 180 states have internal predecessors, (216), 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) [2023-02-17 02:58:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2023-02-17 02:58:19,363 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 23 [2023-02-17 02:58:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:19,363 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2023-02-17 02:58:19,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-02-17 02:58:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2023-02-17 02:58:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 02:58:19,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:19,364 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] [2023-02-17 02:58:19,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 02:58:19,364 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash 998290617, now seen corresponding path program 1 times [2023-02-17 02:58:19,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:19,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489284825] [2023-02-17 02:58:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:19,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:19,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489284825] [2023-02-17 02:58:19,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489284825] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:19,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:19,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 02:58:19,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417815431] [2023-02-17 02:58:19,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:19,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:58:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:58:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:58:19,529 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:19,930 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2023-02-17 02:58:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:58:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 02:58:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:19,932 INFO L225 Difference]: With dead ends: 234 [2023-02-17 02:58:19,932 INFO L226 Difference]: Without dead ends: 234 [2023-02-17 02:58:19,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-02-17 02:58:19,933 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 349 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:19,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 484 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 02:58:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-17 02:58:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 194. [2023-02-17 02:58:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 166 states have (on average 1.4036144578313252) internal successors, (233), 193 states have internal predecessors, (233), 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) [2023-02-17 02:58:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 233 transitions. [2023-02-17 02:58:19,937 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 233 transitions. Word has length 24 [2023-02-17 02:58:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:19,937 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 233 transitions. [2023-02-17 02:58:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 233 transitions. [2023-02-17 02:58:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 02:58:19,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:19,938 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] [2023-02-17 02:58:19,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 02:58:19,938 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash 998278641, now seen corresponding path program 1 times [2023-02-17 02:58:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:19,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518763912] [2023-02-17 02:58:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:19,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:20,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:20,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518763912] [2023-02-17 02:58:20,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518763912] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:20,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:20,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635431885] [2023-02-17 02:58:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:20,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:20,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:20,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:20,045 INFO L87 Difference]: Start difference. First operand 194 states and 233 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:20,157 INFO L93 Difference]: Finished difference Result 225 states and 270 transitions. [2023-02-17 02:58:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:58:20,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 02:58:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:20,158 INFO L225 Difference]: With dead ends: 225 [2023-02-17 02:58:20,158 INFO L226 Difference]: Without dead ends: 225 [2023-02-17 02:58:20,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:20,159 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 150 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:20,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 117 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-17 02:58:20,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 172. [2023-02-17 02:58:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.36) internal successors, (204), 171 states have internal predecessors, (204), 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) [2023-02-17 02:58:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2023-02-17 02:58:20,162 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 24 [2023-02-17 02:58:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:20,162 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2023-02-17 02:58:20,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2023-02-17 02:58:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 02:58:20,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:20,163 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] [2023-02-17 02:58:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-17 02:58:20,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash 525851589, now seen corresponding path program 1 times [2023-02-17 02:58:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:20,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190271467] [2023-02-17 02:58:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:20,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190271467] [2023-02-17 02:58:20,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190271467] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:20,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:20,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 02:58:20,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541288603] [2023-02-17 02:58:20,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:20,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 02:58:20,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 02:58:20,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 02:58:20,629 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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) [2023-02-17 02:58:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:21,160 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2023-02-17 02:58:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 02:58:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 02:58:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:21,162 INFO L225 Difference]: With dead ends: 242 [2023-02-17 02:58:21,162 INFO L226 Difference]: Without dead ends: 242 [2023-02-17 02:58:21,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-02-17 02:58:21,163 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 288 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:21,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 373 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:58:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-02-17 02:58:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 172. [2023-02-17 02:58:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.3466666666666667) internal successors, (202), 171 states have internal predecessors, (202), 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) [2023-02-17 02:58:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2023-02-17 02:58:21,166 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 25 [2023-02-17 02:58:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:21,166 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2023-02-17 02:58:21,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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) [2023-02-17 02:58:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2023-02-17 02:58:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 02:58:21,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:21,167 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] [2023-02-17 02:58:21,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-17 02:58:21,167 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -896291290, now seen corresponding path program 1 times [2023-02-17 02:58:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472254793] [2023-02-17 02:58:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:21,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:21,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:21,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472254793] [2023-02-17 02:58:21,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472254793] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:21,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:21,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 02:58:21,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850998745] [2023-02-17 02:58:21,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:21,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:58:21,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:58:21,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:58:21,341 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2023-02-17 02:58:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:21,572 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2023-02-17 02:58:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 02:58:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 02:58:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:21,574 INFO L225 Difference]: With dead ends: 187 [2023-02-17 02:58:21,574 INFO L226 Difference]: Without dead ends: 187 [2023-02-17 02:58:21,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:58:21,575 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 149 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:21,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 272 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-17 02:58:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2023-02-17 02:58:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.3333333333333333) internal successors, (200), 170 states have internal predecessors, (200), 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) [2023-02-17 02:58:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2023-02-17 02:58:21,578 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 25 [2023-02-17 02:58:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:21,578 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2023-02-17 02:58:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2023-02-17 02:58:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2023-02-17 02:58:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 02:58:21,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:21,579 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] [2023-02-17 02:58:21,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-17 02:58:21,580 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -896291289, now seen corresponding path program 1 times [2023-02-17 02:58:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:21,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178670912] [2023-02-17 02:58:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178670912] [2023-02-17 02:58:21,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178670912] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:21,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:21,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 02:58:21,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323552883] [2023-02-17 02:58:21,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:21,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:58:21,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:21,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:58:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:58:21,815 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2023-02-17 02:58:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:22,018 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2023-02-17 02:58:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:58:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 02:58:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:22,020 INFO L225 Difference]: With dead ends: 173 [2023-02-17 02:58:22,020 INFO L226 Difference]: Without dead ends: 173 [2023-02-17 02:58:22,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-02-17 02:58:22,020 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 133 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:22,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 224 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-17 02:58:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2023-02-17 02:58:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 150 states have (on average 1.32) internal successors, (198), 169 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) [2023-02-17 02:58:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2023-02-17 02:58:22,023 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 25 [2023-02-17 02:58:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:22,024 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2023-02-17 02:58:22,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2023-02-17 02:58:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2023-02-17 02:58:22,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 02:58:22,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:22,024 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] [2023-02-17 02:58:22,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-17 02:58:22,025 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:22,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1096103808, now seen corresponding path program 1 times [2023-02-17 02:58:22,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:22,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816083503] [2023-02-17 02:58:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:22,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816083503] [2023-02-17 02:58:22,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816083503] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:22,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:22,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:58:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691899179] [2023-02-17 02:58:22,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:58:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:58:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:58:22,185 INFO L87 Difference]: Start difference. First operand 170 states and 198 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) [2023-02-17 02:58:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:22,371 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2023-02-17 02:58:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:58:22,372 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 [2023-02-17 02:58:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:22,373 INFO L225 Difference]: With dead ends: 172 [2023-02-17 02:58:22,373 INFO L226 Difference]: Without dead ends: 172 [2023-02-17 02:58:22,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:58:22,373 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 130 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:22,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 222 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-17 02:58:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2023-02-17 02:58:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 150 states have (on average 1.3133333333333332) internal successors, (197), 168 states have internal predecessors, (197), 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) [2023-02-17 02:58:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 197 transitions. [2023-02-17 02:58:22,377 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 197 transitions. Word has length 26 [2023-02-17 02:58:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:22,377 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 197 transitions. [2023-02-17 02:58:22,377 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) [2023-02-17 02:58:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 197 transitions. [2023-02-17 02:58:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 02:58:22,378 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:22,378 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] [2023-02-17 02:58:22,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-17 02:58:22,378 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:22,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1096103807, now seen corresponding path program 1 times [2023-02-17 02:58:22,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:22,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746567993] [2023-02-17 02:58:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:22,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:22,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:22,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746567993] [2023-02-17 02:58:22,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746567993] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:22,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:22,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:58:22,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216180517] [2023-02-17 02:58:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:22,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:58:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:58:22,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:58:22,591 INFO L87 Difference]: Start difference. First operand 169 states and 197 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) [2023-02-17 02:58:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:22,853 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2023-02-17 02:58:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:58:22,854 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 [2023-02-17 02:58:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:22,854 INFO L225 Difference]: With dead ends: 171 [2023-02-17 02:58:22,854 INFO L226 Difference]: Without dead ends: 171 [2023-02-17 02:58:22,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:58:22,855 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 124 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:22,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 303 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-17 02:58:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2023-02-17 02:58:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 150 states have (on average 1.3066666666666666) internal successors, (196), 167 states have internal predecessors, (196), 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) [2023-02-17 02:58:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2023-02-17 02:58:22,858 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 26 [2023-02-17 02:58:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:22,858 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2023-02-17 02:58:22,858 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) [2023-02-17 02:58:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2023-02-17 02:58:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 02:58:22,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:22,859 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] [2023-02-17 02:58:22,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-17 02:58:22,859 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1722459940, now seen corresponding path program 1 times [2023-02-17 02:58:22,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:22,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586041575] [2023-02-17 02:58:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:22,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:22,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:22,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586041575] [2023-02-17 02:58:22,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586041575] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:58:22,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359630246] [2023-02-17 02:58:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:22,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:58:22,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:58:22,997 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) [2023-02-17 02:58:23,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:58:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 02:58:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:58:23,211 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 02:58:23,214 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 02:58:23,239 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-17 02:58:23,242 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 02:58:23,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 02:58:23,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 02:58:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:23,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:58:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:23,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359630246] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:58:23,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:58:23,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-17 02:58:23,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822126364] [2023-02-17 02:58:23,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:58:23,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:58:23,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:58:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:23,296 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:23,368 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2023-02-17 02:58:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:58:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 02:58:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:23,370 INFO L225 Difference]: With dead ends: 174 [2023-02-17 02:58:23,370 INFO L226 Difference]: Without dead ends: 174 [2023-02-17 02:58:23,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:58:23,377 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 12 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:23,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 341 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-17 02:58:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2023-02-17 02:58:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 152 states have (on average 1.3026315789473684) internal successors, (198), 169 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) [2023-02-17 02:58:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2023-02-17 02:58:23,381 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 27 [2023-02-17 02:58:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:23,381 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2023-02-17 02:58:23,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2023-02-17 02:58:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 02:58:23,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:23,382 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, 1, 1] [2023-02-17 02:58:23,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 02:58:23,588 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,SelfDestructingSolverStorable28 [2023-02-17 02:58:23,588 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:23,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1856650752, now seen corresponding path program 1 times [2023-02-17 02:58:23,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:23,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350977486] [2023-02-17 02:58:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:23,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:23,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350977486] [2023-02-17 02:58:23,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350977486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:58:23,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600401782] [2023-02-17 02:58:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:23,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:58:23,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:58:23,876 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) [2023-02-17 02:58:23,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:58:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:24,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 02:58:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:58:24,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 02:58:24,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:24,195 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 38 [2023-02-17 02:58:24,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:24,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 65 [2023-02-17 02:58:24,343 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 02:58:24,346 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 02:58:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:24,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:58:24,741 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 22 [2023-02-17 02:58:24,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-02-17 02:58:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:28,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600401782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:58:28,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:58:28,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-02-17 02:58:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827120643] [2023-02-17 02:58:28,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:58:28,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 02:58:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 02:58:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=529, Unknown=1, NotChecked=0, Total=600 [2023-02-17 02:58:28,973 INFO L87 Difference]: Start difference. First operand 170 states and 198 transitions. Second operand has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 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) [2023-02-17 02:58:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:30,570 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2023-02-17 02:58:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:58:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 02:58:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:30,572 INFO L225 Difference]: With dead ends: 211 [2023-02-17 02:58:30,572 INFO L226 Difference]: Without dead ends: 205 [2023-02-17 02:58:30,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=153, Invalid=968, Unknown=1, NotChecked=0, Total=1122 [2023-02-17 02:58:30,573 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 108 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:30,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 751 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 996 Invalid, 4 Unknown, 0 Unchecked, 1.2s Time] [2023-02-17 02:58:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-17 02:58:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 185. [2023-02-17 02:58:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 167 states have (on average 1.281437125748503) internal successors, (214), 184 states have internal predecessors, (214), 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) [2023-02-17 02:58:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2023-02-17 02:58:30,577 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 28 [2023-02-17 02:58:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:30,578 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2023-02-17 02:58:30,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 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) [2023-02-17 02:58:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2023-02-17 02:58:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 02:58:30,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:30,579 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, 1, 1, 1] [2023-02-17 02:58:30,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 02:58:30,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:58:30,786 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 607909674, now seen corresponding path program 1 times [2023-02-17 02:58:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:30,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712698554] [2023-02-17 02:58:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712698554] [2023-02-17 02:58:30,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712698554] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:30,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:30,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 02:58:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531966469] [2023-02-17 02:58:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:58:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:58:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:58:31,000 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:31,240 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2023-02-17 02:58:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 02:58:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-17 02:58:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:31,241 INFO L225 Difference]: With dead ends: 190 [2023-02-17 02:58:31,241 INFO L226 Difference]: Without dead ends: 190 [2023-02-17 02:58:31,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:58:31,242 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 127 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:31,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 269 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:58:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-17 02:58:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2023-02-17 02:58:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 167 states have (on average 1.2754491017964071) internal successors, (213), 183 states have internal predecessors, (213), 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) [2023-02-17 02:58:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2023-02-17 02:58:31,245 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 29 [2023-02-17 02:58:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:31,245 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2023-02-17 02:58:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2023-02-17 02:58:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 02:58:31,245 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:31,245 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, 1, 1, 1] [2023-02-17 02:58:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-17 02:58:31,246 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash 607909675, now seen corresponding path program 1 times [2023-02-17 02:58:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572559850] [2023-02-17 02:58:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:31,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572559850] [2023-02-17 02:58:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572559850] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:31,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:31,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 02:58:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797757488] [2023-02-17 02:58:31,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 02:58:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 02:58:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:58:31,648 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:31,975 INFO L93 Difference]: Finished difference Result 230 states and 266 transitions. [2023-02-17 02:58:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:58:31,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-17 02:58:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:31,977 INFO L225 Difference]: With dead ends: 230 [2023-02-17 02:58:31,977 INFO L226 Difference]: Without dead ends: 230 [2023-02-17 02:58:31,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:58:31,978 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 267 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:31,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 349 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 02:58:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-17 02:58:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2023-02-17 02:58:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2575757575757576) internal successors, (249), 214 states have internal predecessors, (249), 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) [2023-02-17 02:58:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 249 transitions. [2023-02-17 02:58:31,981 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 249 transitions. Word has length 29 [2023-02-17 02:58:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:31,982 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 249 transitions. [2023-02-17 02:58:31,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 249 transitions. [2023-02-17 02:58:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 02:58:31,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:31,982 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] [2023-02-17 02:58:31,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-17 02:58:31,982 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 997305066, now seen corresponding path program 1 times [2023-02-17 02:58:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:31,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302878688] [2023-02-17 02:58:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:32,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302878688] [2023-02-17 02:58:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302878688] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:32,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:32,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:58:32,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432366347] [2023-02-17 02:58:32,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:32,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:58:32,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:32,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:58:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:58:32,069 INFO L87 Difference]: Start difference. First operand 215 states and 249 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-02-17 02:58:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:32,230 INFO L93 Difference]: Finished difference Result 232 states and 261 transitions. [2023-02-17 02:58:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:58:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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 [2023-02-17 02:58:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:32,232 INFO L225 Difference]: With dead ends: 232 [2023-02-17 02:58:32,232 INFO L226 Difference]: Without dead ends: 232 [2023-02-17 02:58:32,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:58:32,233 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 117 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:32,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 203 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:58:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-02-17 02:58:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 215. [2023-02-17 02:58:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 214 states have internal predecessors, (247), 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) [2023-02-17 02:58:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 247 transitions. [2023-02-17 02:58:32,236 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 247 transitions. Word has length 31 [2023-02-17 02:58:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:32,236 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 247 transitions. [2023-02-17 02:58:32,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-02-17 02:58:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 247 transitions. [2023-02-17 02:58:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 02:58:32,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:32,237 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, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:32,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-17 02:58:32,237 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash 851686138, now seen corresponding path program 1 times [2023-02-17 02:58:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:32,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381623227] [2023-02-17 02:58:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:32,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:32,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381623227] [2023-02-17 02:58:32,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381623227] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:32,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:32,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:58:32,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633153898] [2023-02-17 02:58:32,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:32,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:58:32,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:58:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:58:32,277 INFO L87 Difference]: Start difference. First operand 215 states and 247 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:32,316 INFO L93 Difference]: Finished difference Result 243 states and 273 transitions. [2023-02-17 02:58:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:58:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-17 02:58:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:32,317 INFO L225 Difference]: With dead ends: 243 [2023-02-17 02:58:32,318 INFO L226 Difference]: Without dead ends: 243 [2023-02-17 02:58:32,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:58:32,318 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:32,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 262 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:58:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-17 02:58:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2023-02-17 02:58:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2424242424242424) internal successors, (246), 214 states have internal predecessors, (246), 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) [2023-02-17 02:58:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 246 transitions. [2023-02-17 02:58:32,322 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 246 transitions. Word has length 32 [2023-02-17 02:58:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:32,323 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 246 transitions. [2023-02-17 02:58:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 246 transitions. [2023-02-17 02:58:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 02:58:32,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:32,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:32,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-17 02:58:32,324 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1155721340, now seen corresponding path program 1 times [2023-02-17 02:58:32,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:32,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77542902] [2023-02-17 02:58:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:32,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:32,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:32,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77542902] [2023-02-17 02:58:32,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77542902] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:32,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:32,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 02:58:32,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540542835] [2023-02-17 02:58:32,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:32,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 02:58:32,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 02:58:32,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-17 02:58:32,837 INFO L87 Difference]: Start difference. First operand 215 states and 246 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:33,400 INFO L93 Difference]: Finished difference Result 244 states and 276 transitions. [2023-02-17 02:58:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 02:58:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-17 02:58:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:33,402 INFO L225 Difference]: With dead ends: 244 [2023-02-17 02:58:33,402 INFO L226 Difference]: Without dead ends: 237 [2023-02-17 02:58:33,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2023-02-17 02:58:33,404 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 292 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:33,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 447 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:58:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-02-17 02:58:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 213. [2023-02-17 02:58:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 196 states have (on average 1.239795918367347) internal successors, (243), 212 states have internal predecessors, (243), 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) [2023-02-17 02:58:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 243 transitions. [2023-02-17 02:58:33,420 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 243 transitions. Word has length 38 [2023-02-17 02:58:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:33,420 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 243 transitions. [2023-02-17 02:58:33,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 243 transitions. [2023-02-17 02:58:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 02:58:33,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:33,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:33,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-17 02:58:33,422 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1546128188, now seen corresponding path program 1 times [2023-02-17 02:58:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:33,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670655686] [2023-02-17 02:58:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:34,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:34,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670655686] [2023-02-17 02:58:34,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670655686] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:58:34,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:58:34,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-17 02:58:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922124617] [2023-02-17 02:58:34,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:58:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 02:58:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:58:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 02:58:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-02-17 02:58:34,021 INFO L87 Difference]: Start difference. First operand 213 states and 243 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:58:34,637 INFO L93 Difference]: Finished difference Result 230 states and 260 transitions. [2023-02-17 02:58:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 02:58:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-17 02:58:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:58:34,639 INFO L225 Difference]: With dead ends: 230 [2023-02-17 02:58:34,639 INFO L226 Difference]: Without dead ends: 204 [2023-02-17 02:58:34,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2023-02-17 02:58:34,639 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 348 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:58:34,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 527 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:58:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-17 02:58:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2023-02-17 02:58:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 183 states have (on average 1.2513661202185793) internal successors, (229), 199 states have internal predecessors, (229), 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) [2023-02-17 02:58:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2023-02-17 02:58:34,643 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 38 [2023-02-17 02:58:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:58:34,643 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2023-02-17 02:58:34,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:58:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2023-02-17 02:58:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 02:58:34,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:58:34,643 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:58:34,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-17 02:58:34,644 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-02-17 02:58:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:58:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash -936117449, now seen corresponding path program 1 times [2023-02-17 02:58:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:58:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725564733] [2023-02-17 02:58:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:58:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:35,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:58:35,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725564733] [2023-02-17 02:58:35,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725564733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:58:35,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644269141] [2023-02-17 02:58:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:58:35,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:58:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:58:35,049 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) [2023-02-17 02:58:35,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 02:58:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:58:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-17 02:58:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:58:35,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 02:58:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:58:35,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:35,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 47 [2023-02-17 02:58:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:58:35,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-02-17 02:58:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:58:35,449 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 02:58:35,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:35,535 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 96 [2023-02-17 02:58:35,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-02-17 02:58:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:58:35,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:35,630 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 104 treesize of output 129 [2023-02-17 02:58:35,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-02-17 02:58:35,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:35,868 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 395 treesize of output 306 [2023-02-17 02:58:35,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-02-17 02:58:35,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2023-02-17 02:58:35,918 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 02:58:35,922 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-17 02:58:35,925 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 02:58:35,928 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 02:58:35,929 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 02:58:35,931 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 02:58:36,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:36,110 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 274 [2023-02-17 02:58:36,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 02:58:36,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:36,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 54 case distinctions, treesize of input 163 treesize of output 737 [2023-02-17 02:58:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:58:53,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:58:54,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:54,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 497 treesize of output 328 [2023-02-17 02:58:54,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:54,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2349 treesize of output 2141 [2023-02-17 02:58:54,683 INFO L350 Elim1Store]: Elim1 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 2465 treesize of output 2213 [2023-02-17 02:58:54,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:54,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 7633 treesize of output 6853 [2023-02-17 02:58:54,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:58:54,765 INFO L350 Elim1Store]: Elim1 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 7490 treesize of output 6778 [2023-02-17 02:58:54,824 INFO L350 Elim1Store]: Elim1 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 6731 treesize of output 6707