./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a31fd051 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/960521-1-1.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 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:51:12,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:51:12,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:51:12,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:51:12,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:51:12,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:51:12,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:51:12,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:51:12,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:51:12,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:51:12,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:51:12,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:51:12,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:51:12,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:51:12,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:51:12,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:51:12,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:51:12,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:51:12,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:51:12,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:51:12,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:51:12,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:51:12,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:51:12,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:51:12,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:51:12,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:51:12,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:51:12,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:51:12,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:51:12,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:51:12,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:51:12,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:51:12,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:51:12,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:51:12,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:51:12,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:51:12,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:51:12,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:51:12,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:51:12,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:51:12,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:51:12,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 12:51:12,135 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:51:12,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:51:12,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:51:12,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:51:12,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:51:12,140 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:51:12,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:51:12,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:51:12,141 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:51:12,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:51:12,141 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:51:12,142 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 12:51:12,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:51:12,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:51:12,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:51:12,142 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 12:51:12,142 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 12:51:12,142 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 12:51:12,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:51:12,143 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 12:51:12,143 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:51:12,143 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:51:12,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:51:12,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:51:12,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:51:12,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:51:12,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:51:12,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:51:12,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:51:12,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:51:12,144 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:51:12,144 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:51:12,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:51:12,145 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:51:12,145 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b [2023-02-15 12:51:12,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:51:12,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:51:12,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:51:12,335 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:51:12,335 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:51:12,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-1.i [2023-02-15 12:51:13,304 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:51:13,479 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:51:13,480 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-1.i [2023-02-15 12:51:13,488 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d007c8e19/fbc480e5b7424bb3b6081b2e3ed79855/FLAGe00c4d6d1 [2023-02-15 12:51:13,497 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d007c8e19/fbc480e5b7424bb3b6081b2e3ed79855 [2023-02-15 12:51:13,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:51:13,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:51:13,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:51:13,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:51:13,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:51:13,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42587647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13, skipping insertion in model container [2023-02-15 12:51:13,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:51:13,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:51:13,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:51:13,729 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:51:13,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:51:13,799 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:51:13,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13 WrapperNode [2023-02-15 12:51:13,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:51:13,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:51:13,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:51:13,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:51:13,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,829 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-15 12:51:13,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:51:13,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:51:13,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:51:13,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:51:13,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:51:13,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:51:13,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:51:13,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:51:13,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (1/1) ... [2023-02-15 12:51:13,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:51:13,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:13,885 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) [2023-02-15 12:51:13,886 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 [2023-02-15 12:51:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 12:51:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 12:51:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 12:51:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:51:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 12:51:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:51:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:51:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:51:14,053 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:51:14,055 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:51:14,262 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:51:14,267 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:51:14,267 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 12:51:14,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:51:14 BoogieIcfgContainer [2023-02-15 12:51:14,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:51:14,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:51:14,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:51:14,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:51:14,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:51:13" (1/3) ... [2023-02-15 12:51:14,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79590e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:51:14, skipping insertion in model container [2023-02-15 12:51:14,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:13" (2/3) ... [2023-02-15 12:51:14,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79590e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:51:14, skipping insertion in model container [2023-02-15 12:51:14,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:51:14" (3/3) ... [2023-02-15 12:51:14,274 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1-1.i [2023-02-15 12:51:14,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:51:14,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-02-15 12:51:14,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:51:14,317 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;@4dc90c0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:51:14,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-02-15 12:51:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 12:51:14,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:14,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 12:51:14,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-15 12:51:14,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:14,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250510951] [2023-02-15 12:51:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250510951] [2023-02-15 12:51:14,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250510951] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:51:14,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:51:14,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:51:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345393391] [2023-02-15 12:51:14,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:51:14,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:51:14,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:51:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:51:14,572 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 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) [2023-02-15 12:51:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:14,604 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-15 12:51:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:51:14,606 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 [2023-02-15 12:51:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:14,611 INFO L225 Difference]: With dead ends: 50 [2023-02-15 12:51:14,611 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 12:51:14,612 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 [2023-02-15 12:51:14,614 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:14,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:51:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 12:51:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-15 12:51:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-15 12:51:14,635 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2023-02-15 12:51:14,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:14,636 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-15 12:51:14,636 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) [2023-02-15 12:51:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-15 12:51:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 12:51:14,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:14,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 12:51:14,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:51:14,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-15 12:51:14,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:14,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914075359] [2023-02-15 12:51:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:14,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914075359] [2023-02-15 12:51:14,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914075359] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:51:14,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:51:14,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:51:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360107763] [2023-02-15 12:51:14,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:51:14,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:51:14,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:14,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:51:14,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:51:14,757 INFO L87 Difference]: Start difference. First operand 48 states and 50 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) [2023-02-15 12:51:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:14,780 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-02-15 12:51:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:51:14,781 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 [2023-02-15 12:51:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:14,781 INFO L225 Difference]: With dead ends: 47 [2023-02-15 12:51:14,783 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 12:51:14,783 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 [2023-02-15 12:51:14,784 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:14,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:51:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 12:51:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-15 12:51:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-02-15 12:51:14,791 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2023-02-15 12:51:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:14,792 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-02-15 12:51:14,792 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) [2023-02-15 12:51:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-02-15 12:51:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 12:51:14,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:14,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 12:51:14,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:51:14,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2023-02-15 12:51:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:14,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679210774] [2023-02-15 12:51:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:14,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:14,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679210774] [2023-02-15 12:51:14,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679210774] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:51:14,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:51:14,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:51:14,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158929455] [2023-02-15 12:51:14,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:51:14,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:51:14,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:51:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:51:14,920 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:14,949 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-15 12:51:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:51:14,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-15 12:51:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:14,950 INFO L225 Difference]: With dead ends: 44 [2023-02-15 12:51:14,950 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 12:51:14,951 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 [2023-02-15 12:51:14,955 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:14,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:51:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 12:51:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 12:51:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-02-15 12:51:14,962 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2023-02-15 12:51:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:14,964 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-02-15 12:51:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-02-15 12:51:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 12:51:14,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:14,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 12:51:14,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 12:51:14,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:14,966 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2023-02-15 12:51:14,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:14,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213497506] [2023-02-15 12:51:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:14,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:15,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:15,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213497506] [2023-02-15 12:51:15,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213497506] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:51:15,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:51:15,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:51:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063052136] [2023-02-15 12:51:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:51:15,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 12:51:15,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 12:51:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:51:15,155 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:15,252 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-02-15 12:51:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:51:15,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-15 12:51:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:15,254 INFO L225 Difference]: With dead ends: 51 [2023-02-15 12:51:15,254 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 12:51:15,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:51:15,261 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:15,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 64 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:51:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 12:51:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-02-15 12:51:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-02-15 12:51:15,274 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 6 [2023-02-15 12:51:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:15,275 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-02-15 12:51:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-02-15 12:51:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 12:51:15,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:15,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:15,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 12:51:15,277 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash 59362067, now seen corresponding path program 1 times [2023-02-15 12:51:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:15,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840189382] [2023-02-15 12:51:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:15,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:15,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840189382] [2023-02-15 12:51:15,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840189382] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:51:15,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:51:15,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:51:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131818788] [2023-02-15 12:51:15,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:51:15,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:51:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:51:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:51:15,316 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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) [2023-02-15 12:51:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:15,343 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-15 12:51:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:51:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 [2023-02-15 12:51:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:15,344 INFO L225 Difference]: With dead ends: 50 [2023-02-15 12:51:15,344 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 12:51:15,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:51:15,345 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:15,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 66 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:51:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 12:51:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2023-02-15 12:51:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-02-15 12:51:15,352 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 8 [2023-02-15 12:51:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:15,354 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-02-15 12:51:15,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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) [2023-02-15 12:51:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-02-15 12:51:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 12:51:15,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:15,355 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:15,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 12:51:15,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2023-02-15 12:51:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887900393] [2023-02-15 12:51:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:15,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:15,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887900393] [2023-02-15 12:51:15,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887900393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721413136] [2023-02-15 12:51:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:15,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:15,603 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) [2023-02-15 12:51:15,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:51:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 12:51:15,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:15,700 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:51:15,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 12:51:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:15,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:15,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721413136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:15,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:15,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-02-15 12:51:15,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108022371] [2023-02-15 12:51:15,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:15,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 12:51:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 12:51:15,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:51:15,825 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 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) [2023-02-15 12:51:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:16,035 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-02-15 12:51:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:51:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 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 9 [2023-02-15 12:51:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:16,036 INFO L225 Difference]: With dead ends: 67 [2023-02-15 12:51:16,037 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 12:51:16,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-15 12:51:16,037 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:16,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 120 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:51:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 12:51:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-02-15 12:51:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.5) internal successors, (69), 59 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) [2023-02-15 12:51:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-02-15 12:51:16,041 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 9 [2023-02-15 12:51:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:16,041 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-02-15 12:51:16,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 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) [2023-02-15 12:51:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-02-15 12:51:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 12:51:16,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:16,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:16,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:51:16,248 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,SelfDestructingSolverStorable5 [2023-02-15 12:51:16,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2023-02-15 12:51:16,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:16,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32440275] [2023-02-15 12:51:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:51:16,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:16,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32440275] [2023-02-15 12:51:16,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32440275] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:51:16,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:51:16,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:51:16,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227136157] [2023-02-15 12:51:16,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:51:16,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:51:16,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:51:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:51:16,280 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:16,312 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-02-15 12:51:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:51:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-02-15 12:51:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:16,313 INFO L225 Difference]: With dead ends: 58 [2023-02-15 12:51:16,313 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 12:51:16,313 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 [2023-02-15 12:51:16,314 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:16,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:51:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 12:51:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-15 12:51:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-02-15 12:51:16,316 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 11 [2023-02-15 12:51:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:16,317 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-02-15 12:51:16,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-02-15 12:51:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 12:51:16,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:16,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:16,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 12:51:16,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2023-02-15 12:51:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560077066] [2023-02-15 12:51:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:16,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:16,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560077066] [2023-02-15 12:51:16,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560077066] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:16,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366752584] [2023-02-15 12:51:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:16,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:16,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:16,369 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) [2023-02-15 12:51:16,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:51:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:16,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 12:51:16,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:16,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:16,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366752584] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:16,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:16,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-15 12:51:16,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244070954] [2023-02-15 12:51:16,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:16,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 12:51:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 12:51:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:51:16,506 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2023-02-15 12:51:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:16,560 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-02-15 12:51:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:51:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 11 [2023-02-15 12:51:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:16,562 INFO L225 Difference]: With dead ends: 60 [2023-02-15 12:51:16,562 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 12:51:16,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:51:16,562 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 147 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:16,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 142 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:51:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 12:51:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-02-15 12:51:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-02-15 12:51:16,565 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 11 [2023-02-15 12:51:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:16,565 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-02-15 12:51:16,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2023-02-15 12:51:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-02-15 12:51:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 12:51:16,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:16,566 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2023-02-15 12:51:16,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:51:16,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 12:51:16,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2023-02-15 12:51:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:16,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396334775] [2023-02-15 12:51:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:16,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396334775] [2023-02-15 12:51:17,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396334775] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230198357] [2023-02-15 12:51:17,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:51:17,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:17,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:17,051 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) [2023-02-15 12:51:17,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:51:17,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:51:17,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:51:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:51:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:17,110 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:51:17,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 12:51:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:17,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:17,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230198357] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:17,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:17,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-02-15 12:51:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816707586] [2023-02-15 12:51:17,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:17,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 12:51:17,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 12:51:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-02-15 12:51:17,410 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:18,007 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2023-02-15 12:51:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:51:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 12:51:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:18,007 INFO L225 Difference]: With dead ends: 108 [2023-02-15 12:51:18,007 INFO L226 Difference]: Without dead ends: 108 [2023-02-15 12:51:18,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:51:18,008 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:18,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 142 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:51:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-15 12:51:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2023-02-15 12:51:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 93 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2023-02-15 12:51:18,011 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 18 [2023-02-15 12:51:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:18,011 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2023-02-15 12:51:18,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2023-02-15 12:51:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 12:51:18,012 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:18,012 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:18,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 12:51:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:18,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:18,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 2 times [2023-02-15 12:51:18,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:18,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955858189] [2023-02-15 12:51:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:18,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955858189] [2023-02-15 12:51:18,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955858189] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566212359] [2023-02-15 12:51:18,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:51:18,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:18,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:18,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:51:18,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:51:18,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 12:51:18,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:51:18,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 12:51:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:18,334 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 12:51:18,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 12:51:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 12:51:18,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:51:18,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566212359] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:51:18,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:51:18,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-02-15 12:51:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595534765] [2023-02-15 12:51:18,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:51:18,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:51:18,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:18,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:51:18,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:51:18,384 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:18,403 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-02-15 12:51:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:51:18,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 12:51:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:18,403 INFO L225 Difference]: With dead ends: 82 [2023-02-15 12:51:18,404 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 12:51:18,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:51:18,404 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:18,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:51:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 12:51:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-02-15 12:51:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.263157894736842) internal successors, (96), 81 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2023-02-15 12:51:18,412 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 20 [2023-02-15 12:51:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:18,412 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2023-02-15 12:51:18,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2023-02-15 12:51:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 12:51:18,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:18,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:18,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:51:18,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:18,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:18,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1417752011, now seen corresponding path program 1 times [2023-02-15 12:51:18,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:18,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325317713] [2023-02-15 12:51:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:18,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:51:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325317713] [2023-02-15 12:51:18,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325317713] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450253265] [2023-02-15 12:51:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:18,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:51:18,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:51:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:18,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 12:51:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:51:18,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:51:18,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450253265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:18,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:18,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-02-15 12:51:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746324752] [2023-02-15 12:51:18,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:18,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 12:51:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 12:51:18,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2023-02-15 12:51:18,863 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:18,977 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2023-02-15 12:51:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 12:51:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2023-02-15 12:51:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:18,978 INFO L225 Difference]: With dead ends: 89 [2023-02-15 12:51:18,978 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 12:51:18,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2023-02-15 12:51:18,978 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 126 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:18,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 65 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:51:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 12:51:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2023-02-15 12:51:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-02-15 12:51:18,980 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 23 [2023-02-15 12:51:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:18,980 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-02-15 12:51:18,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-02-15 12:51:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 12:51:18,981 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:18,981 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1] [2023-02-15 12:51:18,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:51:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 12:51:19,182 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 820795113, now seen corresponding path program 3 times [2023-02-15 12:51:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:19,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995887777] [2023-02-15 12:51:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:19,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:51:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995887777] [2023-02-15 12:51:19,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995887777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852974159] [2023-02-15 12:51:19,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:51:19,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:19,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:19,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:51:19,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:51:19,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 12:51:19,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:51:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 12:51:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:19,710 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-15 12:51:19,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2023-02-15 12:51:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 12:51:19,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 12:51:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852974159] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:20,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:20,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 23 [2023-02-15 12:51:20,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624222653] [2023-02-15 12:51:20,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:20,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 12:51:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 12:51:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-02-15 12:51:20,107 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:20,968 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2023-02-15 12:51:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 12:51:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-15 12:51:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:20,969 INFO L225 Difference]: With dead ends: 120 [2023-02-15 12:51:20,969 INFO L226 Difference]: Without dead ends: 120 [2023-02-15 12:51:20,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 12:51:20,970 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 403 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:20,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 84 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:51:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-15 12:51:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2023-02-15 12:51:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2023-02-15 12:51:20,973 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 36 [2023-02-15 12:51:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:20,973 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2023-02-15 12:51:20,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2023-02-15 12:51:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 12:51:20,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:20,974 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:20,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 12:51:21,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:21,179 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1425185077, now seen corresponding path program 2 times [2023-02-15 12:51:21,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:21,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521647247] [2023-02-15 12:51:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:51:21,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521647247] [2023-02-15 12:51:21,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521647247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190593947] [2023-02-15 12:51:21,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:51:21,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:21,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:21,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:51:21,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:51:21,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:51:21,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:51:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 12:51:21,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:51:21,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:51:21,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190593947] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:21,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:21,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2023-02-15 12:51:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058595541] [2023-02-15 12:51:21,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 12:51:21,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 12:51:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 12:51:21,887 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:22,311 INFO L93 Difference]: Finished difference Result 379 states and 380 transitions. [2023-02-15 12:51:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 12:51:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 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 47 [2023-02-15 12:51:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:22,313 INFO L225 Difference]: With dead ends: 379 [2023-02-15 12:51:22,313 INFO L226 Difference]: Without dead ends: 379 [2023-02-15 12:51:22,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1190, Invalid=1890, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 12:51:22,314 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1040 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:22,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1040 Valid, 219 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:51:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-02-15 12:51:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 140. [2023-02-15 12:51:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.125925925925926) internal successors, (152), 139 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2023-02-15 12:51:22,318 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 47 [2023-02-15 12:51:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:22,318 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2023-02-15 12:51:22,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2023-02-15 12:51:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-15 12:51:22,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:22,320 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:22,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 12:51:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:22,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1050815861, now seen corresponding path program 3 times [2023-02-15 12:51:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:22,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142395575] [2023-02-15 12:51:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:22,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:51:23,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142395575] [2023-02-15 12:51:23,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142395575] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766165716] [2023-02-15 12:51:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:51:23,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:23,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:23,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:51:23,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:51:23,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 12:51:23,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:51:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 12:51:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:23,174 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 10 treesize of output 8 [2023-02-15 12:51:23,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 12:51:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-02-15 12:51:24,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-02-15 12:51:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766165716] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:24,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:24,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 42 [2023-02-15 12:51:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488739037] [2023-02-15 12:51:24,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:24,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 12:51:24,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 12:51:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:51:24,690 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:30,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:51:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:34,263 INFO L93 Difference]: Finished difference Result 422 states and 423 transitions. [2023-02-15 12:51:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-15 12:51:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 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 89 [2023-02-15 12:51:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:34,264 INFO L225 Difference]: With dead ends: 422 [2023-02-15 12:51:34,264 INFO L226 Difference]: Without dead ends: 422 [2023-02-15 12:51:34,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6942 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6127, Invalid=15925, Unknown=0, NotChecked=0, Total=22052 [2023-02-15 12:51:34,270 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2266 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 123 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2266 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:34,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2266 Valid, 79 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 603 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2023-02-15 12:51:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-02-15 12:51:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 143. [2023-02-15 12:51:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1014492753623188) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2023-02-15 12:51:34,273 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 89 [2023-02-15 12:51:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:34,273 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2023-02-15 12:51:34,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2023-02-15 12:51:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 12:51:34,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:34,274 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:34,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:51:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 12:51:34,479 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash -140440454, now seen corresponding path program 4 times [2023-02-15 12:51:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351583358] [2023-02-15 12:51:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:51:35,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351583358] [2023-02-15 12:51:35,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351583358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092532244] [2023-02-15 12:51:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:51:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:35,105 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:51:35,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:51:36,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:51:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:51:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 12:51:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:51:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:51:36,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:51:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:51:37,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092532244] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:51:37,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:51:37,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 88 [2023-02-15 12:51:37,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78383377] [2023-02-15 12:51:37,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:51:37,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-15 12:51:37,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:51:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-15 12:51:37,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3367, Invalid=4289, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 12:51:37,552 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:51:39,118 INFO L93 Difference]: Finished difference Result 811 states and 812 transitions. [2023-02-15 12:51:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 12:51:39,118 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 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 101 [2023-02-15 12:51:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:51:39,120 INFO L225 Difference]: With dead ends: 811 [2023-02-15 12:51:39,120 INFO L226 Difference]: Without dead ends: 811 [2023-02-15 12:51:39,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4757 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5075, Invalid=8265, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 12:51:39,123 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3754 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:51:39,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3754 Valid, 485 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:51:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2023-02-15 12:51:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 275. [2023-02-15 12:51:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.1074074074074074) internal successors, (299), 274 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 299 transitions. [2023-02-15 12:51:39,127 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 299 transitions. Word has length 101 [2023-02-15 12:51:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:51:39,128 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 299 transitions. [2023-02-15 12:51:39,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:51:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 299 transitions. [2023-02-15 12:51:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-02-15 12:51:39,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:51:39,129 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:51:39,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 12:51:39,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 12:51:39,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 12:51:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:51:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash 702337748, now seen corresponding path program 5 times [2023-02-15 12:51:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:51:39,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342632401] [2023-02-15 12:51:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:51:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:51:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:51:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4702 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:51:41,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:51:41,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342632401] [2023-02-15 12:51:41,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342632401] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:51:41,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744194429] [2023-02-15 12:51:41,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:51:41,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:51:41,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:51:41,285 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:51:41,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process