./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e8d55036 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-ext3/realloc1.c -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 ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 22:34:23,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:34:23,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:34:23,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:34:23,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:34:23,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:34:23,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:34:23,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:34:23,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:34:23,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:34:23,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:34:23,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:34:23,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:34:23,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:34:23,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:34:23,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:34:23,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:34:23,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:34:23,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:34:23,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:34:23,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:34:23,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:34:23,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:34:23,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:34:23,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:34:23,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:34:23,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:34:23,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:34:23,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:34:23,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:34:23,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:34:23,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:34:23,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:34:23,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:34:23,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:34:23,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:34:23,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:34:23,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:34:23,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:34:23,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:34:23,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:34:23,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 22:34:23,806 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:34:23,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:34:23,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:34:23,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:34:23,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:34:23,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:34:23,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:34:23,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:34:23,809 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:34:23,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:34:23,809 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 22:34:23,810 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:34:23,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:34:23,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 22:34:23,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:34:23,810 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 22:34:23,810 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 22:34:23,811 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 22:34:23,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:34:23,811 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 22:34:23,811 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 22:34:23,811 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:34:23,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:34:23,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:34:23,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:34:23,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:34:23,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:34:23,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:34:23,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:34:23,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:34:23,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:34:23,813 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:34:23,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:34:23,813 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:34:23,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 [2023-02-15 22:34:24,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:34:24,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:34:24,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:34:24,028 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:34:24,041 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:34:24,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/realloc1.c [2023-02-15 22:34:25,142 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:34:25,260 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:34:25,261 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/realloc1.c [2023-02-15 22:34:25,264 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86ef4db3a/19533f52c1b240109309367283417ac0/FLAG1dd8df3f8 [2023-02-15 22:34:25,275 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86ef4db3a/19533f52c1b240109309367283417ac0 [2023-02-15 22:34:25,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:34:25,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:34:25,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:34:25,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:34:25,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:34:25,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70783cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25, skipping insertion in model container [2023-02-15 22:34:25,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:34:25,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:34:25,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:34:25,394 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:34:25,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:34:25,411 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:34:25,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25 WrapperNode [2023-02-15 22:34:25,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:34:25,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:34:25,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:34:25,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:34:25,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,432 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-02-15 22:34:25,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:34:25,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:34:25,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:34:25,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:34:25,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,460 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:34:25,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:34:25,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:34:25,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:34:25,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (1/1) ... [2023-02-15 22:34:25,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:34:25,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:34:25,538 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 22:34:25,568 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 22:34:25,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 22:34:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 22:34:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:34:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:34:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 22:34:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 22:34:25,638 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:34:25,639 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:34:25,789 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:34:25,793 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:34:25,793 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 22:34:25,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:34:25 BoogieIcfgContainer [2023-02-15 22:34:25,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:34:25,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:34:25,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:34:25,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:34:25,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:34:25" (1/3) ... [2023-02-15 22:34:25,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8be2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:34:25, skipping insertion in model container [2023-02-15 22:34:25,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:34:25" (2/3) ... [2023-02-15 22:34:25,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8be2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:34:25, skipping insertion in model container [2023-02-15 22:34:25,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:34:25" (3/3) ... [2023-02-15 22:34:25,800 INFO L112 eAbstractionObserver]: Analyzing ICFG realloc1.c [2023-02-15 22:34:25,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:34:25,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-15 22:34:25,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:34:25,856 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;@24d6d2b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:34:25,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-15 22:34:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 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 22:34:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 22:34:25,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:25,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 22:34:25,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 926021, now seen corresponding path program 1 times [2023-02-15 22:34:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:25,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728272749] [2023-02-15 22:34:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:25,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,003 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 22:34:26,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728272749] [2023-02-15 22:34:26,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728272749] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:34:26,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:34:26,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:34:26,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403192176] [2023-02-15 22:34:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:34:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 22:34:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 22:34:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 22:34:26,034 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:26,043 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-02-15 22:34:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 22:34:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 22:34:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:26,049 INFO L225 Difference]: With dead ends: 25 [2023-02-15 22:34:26,049 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 22:34:26,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 22:34:26,052 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:26,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 22:34:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-15 22:34:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 22 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 22:34:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-02-15 22:34:26,072 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 4 [2023-02-15 22:34:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:26,073 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-02-15 22:34:26,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-02-15 22:34:26,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 22:34:26,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:26,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 22:34:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:34:26,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 925711, now seen corresponding path program 1 times [2023-02-15 22:34:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:26,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702950642] [2023-02-15 22:34:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,109 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 22:34:26,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702950642] [2023-02-15 22:34:26,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702950642] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:34:26,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:34:26,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:34:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317919640] [2023-02-15 22:34:26,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:34:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:34:26,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:34:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:34:26,112 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:26,126 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-02-15 22:34:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:34:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 22:34:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:26,127 INFO L225 Difference]: With dead ends: 29 [2023-02-15 22:34:26,127 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 22:34:26,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:34:26,128 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 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 22:34:26,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 22:34:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2023-02-15 22:34:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-02-15 22:34:26,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 4 [2023-02-15 22:34:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:26,132 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-02-15 22:34:26,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-02-15 22:34:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 22:34:26,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:26,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 22:34:26,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:34:26,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:26,134 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-15 22:34:26,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:26,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048594654] [2023-02-15 22:34:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:26,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,176 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 22:34:26,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048594654] [2023-02-15 22:34:26,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048594654] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:34:26,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:34:26,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:34:26,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515903336] [2023-02-15 22:34:26,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:34:26,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:34:26,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:34:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:34:26,179 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:26,219 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-02-15 22:34:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:34:26,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 22:34:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:26,220 INFO L225 Difference]: With dead ends: 26 [2023-02-15 22:34:26,220 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 22:34:26,220 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 22:34:26,221 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:26,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 22:34:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2023-02-15 22:34:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-15 22:34:26,225 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2023-02-15 22:34:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:26,225 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-15 22:34:26,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-15 22:34:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 22:34:26,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:26,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 22:34:26,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 22:34:26,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:26,227 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-15 22:34:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:26,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504636365] [2023-02-15 22:34:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,306 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 22:34:26,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:26,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504636365] [2023-02-15 22:34:26,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504636365] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:34:26,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:34:26,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:34:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303724618] [2023-02-15 22:34:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:34:26,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:34:26,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:34:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:34:26,310 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:26,332 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-02-15 22:34:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:34:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 22:34:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:26,333 INFO L225 Difference]: With dead ends: 25 [2023-02-15 22:34:26,334 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 22:34:26,334 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 22:34:26,335 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 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 22:34:26,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 22:34:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-15 22:34:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 22 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 22:34:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-02-15 22:34:26,338 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 4 [2023-02-15 22:34:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:26,338 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-02-15 22:34:26,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-02-15 22:34:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:34:26,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:26,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:34:26,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 22:34:26,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 264435858, now seen corresponding path program 1 times [2023-02-15 22:34:26,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:26,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614370085] [2023-02-15 22:34:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,374 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 22:34:26,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614370085] [2023-02-15 22:34:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614370085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:34:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284872374] [2023-02-15 22:34:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:26,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:34:26,379 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 22:34:26,381 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 22:34:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 22:34:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:34:26,454 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 22:34:26,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:34:26,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284872374] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:34:26,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:34:26,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-02-15 22:34:26,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525065551] [2023-02-15 22:34:26,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:34:26,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:34:26,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:26,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:34:26,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:34:26,456 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 22:34:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:26,464 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-02-15 22:34:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:34:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 22:34:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:26,473 INFO L225 Difference]: With dead ends: 25 [2023-02-15 22:34:26,473 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 22:34:26,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:34:26,474 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:26,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 22:34:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-02-15 22:34:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-15 22:34:26,477 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2023-02-15 22:34:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:26,477 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-15 22:34:26,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 22:34:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-15 22:34:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:34:26,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:26,478 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:34:26,486 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 22:34:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:26,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:26,685 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-15 22:34:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:26,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218357304] [2023-02-15 22:34:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:26,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,786 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 22:34:26,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218357304] [2023-02-15 22:34:26,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218357304] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:34:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861985547] [2023-02-15 22:34:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:26,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:26,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:34:26,789 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 22:34:26,814 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 22:34:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:26,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:34:26,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:34:26,918 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:34:26,957 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 22:34:26,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:34:27,012 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 22:34:27,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861985547] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:34:27,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:34:27,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-15 22:34:27,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424553101] [2023-02-15 22:34:27,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:34:27,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:34:27,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:27,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:34:27,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:34:27,014 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:27,085 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-15 22:34:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:34:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 22:34:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:27,087 INFO L225 Difference]: With dead ends: 58 [2023-02-15 22:34:27,087 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 22:34:27,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:34:27,088 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:27,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 28 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:34:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 22:34:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2023-02-15 22:34:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-15 22:34:27,092 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 8 [2023-02-15 22:34:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:27,092 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-15 22:34:27,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-15 22:34:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 22:34:27,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:27,093 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 22:34:27,099 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 22:34:27,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 22:34:27,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -4646080, now seen corresponding path program 1 times [2023-02-15 22:34:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:27,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568910948] [2023-02-15 22:34:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:27,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 22:34:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568910948] [2023-02-15 22:34:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568910948] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:34:27,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:34:27,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:34:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751902976] [2023-02-15 22:34:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:34:27,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:34:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:27,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:34:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:34:27,351 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:27,369 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-02-15 22:34:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:34:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 22:34:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:27,370 INFO L225 Difference]: With dead ends: 36 [2023-02-15 22:34:27,370 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 22:34:27,370 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 22:34:27,371 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:27,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 22:34:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-02-15 22:34:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 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 22:34:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 22:34:27,377 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2023-02-15 22:34:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:27,377 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 22:34:27,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 22:34:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 22:34:27,378 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:27,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:34:27,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 22:34:27,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:27,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:27,378 INFO L85 PathProgramCache]: Analyzing trace with hash -169913821, now seen corresponding path program 1 times [2023-02-15 22:34:27,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:27,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152767834] [2023-02-15 22:34:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:27,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:27,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152767834] [2023-02-15 22:34:27,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152767834] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:34:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120419201] [2023-02-15 22:34:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:27,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:34:27,457 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 22:34:27,460 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 22:34:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 22:34:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:34:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:27,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:34:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:27,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120419201] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:34:27,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:34:27,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-15 22:34:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704480810] [2023-02-15 22:34:27,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:34:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 22:34:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 22:34:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:34:27,532 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 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 22:34:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:27,555 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2023-02-15 22:34:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 22:34:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 22:34:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:27,556 INFO L225 Difference]: With dead ends: 41 [2023-02-15 22:34:27,556 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 22:34:27,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:34:27,556 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:27,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 22:34:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-02-15 22:34:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 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 22:34:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-15 22:34:27,559 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2023-02-15 22:34:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:27,559 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-15 22:34:27,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 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 22:34:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-15 22:34:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 22:34:27,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:27,560 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-02-15 22:34:27,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 22:34:27,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:27,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-02-15 22:34:27,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:27,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010980389] [2023-02-15 22:34:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:27,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:27,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:27,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010980389] [2023-02-15 22:34:27,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010980389] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:34:27,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674430562] [2023-02-15 22:34:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:34:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:34:27,949 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 22:34:27,951 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 22:34:27,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:34:27,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:34:27,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 22:34:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:34:28,006 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:34:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:28,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:34:28,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674430562] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:34:28,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:34:28,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-15 22:34:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718369505] [2023-02-15 22:34:28,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:34:28,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:34:28,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:34:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:34:28,159 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:28,205 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2023-02-15 22:34:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 22:34:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 22:34:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:28,206 INFO L225 Difference]: With dead ends: 41 [2023-02-15 22:34:28,206 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 22:34:28,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:34:28,207 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:28,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 22:34:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-02-15 22:34:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 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 22:34:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-02-15 22:34:28,220 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2023-02-15 22:34:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:28,221 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-02-15 22:34:28,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:34:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-02-15 22:34:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 22:34:28,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:28,222 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:34:28,226 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 22:34:28,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:28,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1600186775, now seen corresponding path program 2 times [2023-02-15 22:34:28,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:28,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025481123] [2023-02-15 22:34:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:28,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:34:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:28,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:34:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025481123] [2023-02-15 22:34:28,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025481123] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:34:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7603404] [2023-02-15 22:34:28,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:34:28,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:34:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:34:28,500 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 22:34:28,546 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 22:34:28,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:34:28,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:34:28,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 22:34:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:34:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:28,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:34:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:34:28,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7603404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:34:28,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:34:28,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2023-02-15 22:34:28,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382026101] [2023-02-15 22:34:28,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:34:28,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 22:34:28,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:34:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 22:34:28,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:34:28,649 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 22:34:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:34:28,676 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-02-15 22:34:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 22:34:28,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) Word has length 31 [2023-02-15 22:34:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:34:28,677 INFO L225 Difference]: With dead ends: 54 [2023-02-15 22:34:28,677 INFO L226 Difference]: Without dead ends: 54 [2023-02-15 22:34:28,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:34:28,678 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:34:28,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 64 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:34:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-15 22:34:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-02-15 22:34:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 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 22:34:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-02-15 22:34:28,680 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 31 [2023-02-15 22:34:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:34:28,680 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-02-15 22:34:28,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 22:34:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-02-15 22:34:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 22:34:28,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:34:28,681 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:34:28,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 22:34:28,885 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,SelfDestructingSolverStorable9 [2023-02-15 22:34:28,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2023-02-15 22:34:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:34:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1707940107, now seen corresponding path program 3 times [2023-02-15 22:34:28,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:34:28,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076172965] [2023-02-15 22:34:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:34:28,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:34:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 22:34:28,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 22:34:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 22:34:28,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 22:34:28,928 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 22:34:28,928 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-02-15 22:34:28,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-02-15 22:34:28,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-02-15 22:34:28,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (4 of 8 remaining) [2023-02-15 22:34:28,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (3 of 8 remaining) [2023-02-15 22:34:28,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (2 of 8 remaining) [2023-02-15 22:34:28,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-02-15 22:34:28,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-02-15 22:34:28,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 22:34:28,933 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:34:28,936 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 22:34:28,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 10:34:28 BoogieIcfgContainer [2023-02-15 22:34:28,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 22:34:28,968 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 22:34:28,968 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 22:34:28,968 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 22:34:28,969 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:34:25" (3/4) ... [2023-02-15 22:34:28,970 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 22:34:29,011 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 22:34:29,011 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 22:34:29,011 INFO L158 Benchmark]: Toolchain (without parser) took 3733.01ms. Allocated memory was 132.1MB in the beginning and 169.9MB in the end (delta: 37.7MB). Free memory was 85.0MB in the beginning and 91.1MB in the end (delta: -6.1MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. [2023-02-15 22:34:29,012 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 132.1MB. Free memory is still 105.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 22:34:29,012 INFO L158 Benchmark]: CACSL2BoogieTranslator took 132.35ms. Allocated memory is still 132.1MB. Free memory was 85.0MB in the beginning and 75.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 22:34:29,012 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.86ms. Allocated memory is still 132.1MB. Free memory was 75.0MB in the beginning and 73.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 22:34:29,013 INFO L158 Benchmark]: Boogie Preprocessor took 29.14ms. Allocated memory is still 132.1MB. Free memory was 73.5MB in the beginning and 72.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 22:34:29,013 INFO L158 Benchmark]: RCFGBuilder took 332.16ms. Allocated memory is still 132.1MB. Free memory was 72.0MB in the beginning and 60.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 22:34:29,013 INFO L158 Benchmark]: TraceAbstraction took 3172.07ms. Allocated memory was 132.1MB in the beginning and 169.9MB in the end (delta: 37.7MB). Free memory was 59.8MB in the beginning and 93.2MB in the end (delta: -33.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2023-02-15 22:34:29,013 INFO L158 Benchmark]: Witness Printer took 43.11ms. Allocated memory is still 169.9MB. Free memory was 93.2MB in the beginning and 91.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 22:34:29,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 132.1MB. Free memory is still 105.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 132.35ms. Allocated memory is still 132.1MB. Free memory was 85.0MB in the beginning and 75.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.86ms. Allocated memory is still 132.1MB. Free memory was 75.0MB in the beginning and 73.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.14ms. Allocated memory is still 132.1MB. Free memory was 73.5MB in the beginning and 72.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 332.16ms. Allocated memory is still 132.1MB. Free memory was 72.0MB in the beginning and 60.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3172.07ms. Allocated memory was 132.1MB in the beginning and 169.9MB in the end (delta: 37.7MB). Free memory was 59.8MB in the beginning and 93.2MB in the end (delta: -33.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Witness Printer took 43.11ms. Allocated memory is still 169.9MB. Free memory was 93.2MB in the beginning and 91.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=0, p={-1:0}] [L10] i++ VAL [i=1, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-3, i=1, p={-1:0}] [L10] i++ VAL [i=2, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-4, i=2, p={-1:0}] [L10] i++ VAL [i=3, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-5, i=3, p={-1:0}] [L10] i++ VAL [i=4, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-6, i=4, p={-1:0}] [L10] i++ VAL [i=5, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-7, i=5, p={-1:0}] [L10] i++ VAL [i=6, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-8, i=6, p={-1:0}] [L10] i++ VAL [i=7, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-9, i=7, p={-1:0}] [L10] i++ VAL [i=8, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=10, i=8, p={-1:0}] [L10] i++ VAL [i=9, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-10, i=9, p={-1:0}] [L10] i++ VAL [i=10, p={-1:0}] [L10] COND FALSE !(i < 10) VAL [i=10, p={-1:0}] [L14] free(p) VAL [i=10, p={-1:0}] [L14] free(p) VAL [i=10, p={-1:0}] [L14] free(p) [L16] p[2] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 7]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 126 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 126 mSDsluCounter, 317 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 155 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 280 IncrementalHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 162 mSDtfsCounter, 280 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=10, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 45 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 229 ConstructedInterpolants, 0 QuantifiedInterpolants, 1165 SizeOfPredicates, 0 NumberOfNonLiveVariables, 344 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 18 InterpolantComputations, 7 PerfectInterpolantSequences, 39/294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-15 22:34:29,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)