./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/960521-1-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:22:12,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:22:12,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:22:12,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:22:12,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:22:12,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:22:12,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:22:12,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:22:12,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:22:12,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:22:12,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:22:12,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:22:12,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:22:12,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:22:12,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:22:12,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:22:12,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:22:12,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:22:12,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:22:12,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:22:12,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:22:12,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:22:12,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:22:12,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:22:12,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:22:12,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:22:12,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:22:12,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:22:12,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:22:12,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:22:12,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:22:12,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:22:12,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:22:12,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:22:12,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:22:12,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:22:12,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:22:12,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:22:12,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:22:12,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:22:12,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:22:12,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:22:12,275 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:22:12,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:22:12,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:22:12,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:22:12,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:22:12,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:22:12,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:22:12,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:22:12,277 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:22:12,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:22:12,278 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:22:12,279 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:22:12,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:22:12,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:22:12,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:22:12,279 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:22:12,280 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:22:12,280 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:22:12,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:22:12,280 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:22:12,280 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:22:12,281 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:22:12,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:22:12,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:22:12,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:22:12,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:22:12,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:22:12,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:22:12,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:22:12,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:22:12,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:22:12,283 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:22:12,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:22:12,283 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:22:12,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b [2023-02-18 20:22:12,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:22:12,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:22:12,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:22:12,573 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:22:12,573 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:22:12,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-3.i [2023-02-18 20:22:13,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:22:13,911 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:22:13,912 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-3.i [2023-02-18 20:22:13,920 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa66a7ca1/572085b128674a59b54cd26f1a0e03b4/FLAG2325e6c80 [2023-02-18 20:22:13,934 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa66a7ca1/572085b128674a59b54cd26f1a0e03b4 [2023-02-18 20:22:13,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:22:13,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:22:13,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:22:13,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:22:13,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:22:13,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:22:13" (1/1) ... [2023-02-18 20:22:13,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428389be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:13, skipping insertion in model container [2023-02-18 20:22:13,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:22:13" (1/1) ... [2023-02-18 20:22:13,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:22:14,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:22:14,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:22:14,244 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:22:14,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:22:14,311 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:22:14,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14 WrapperNode [2023-02-18 20:22:14,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:22:14,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:22:14,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:22:14,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:22:14,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,351 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-18 20:22:14,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:22:14,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:22:14,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:22:14,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:22:14,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:22:14,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:22:14,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:22:14,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:22:14,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (1/1) ... [2023-02-18 20:22:14,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:22:14,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:14,402 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) [2023-02-18 20:22:14,417 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 [2023-02-18 20:22:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 20:22:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 20:22:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 20:22:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 20:22:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:22:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 20:22:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:22:14,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:22:14,594 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:22:14,595 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:22:14,805 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:22:14,810 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:22:14,810 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 20:22:14,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:22:14 BoogieIcfgContainer [2023-02-18 20:22:14,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:22:14,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:22:14,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:22:14,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:22:14,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:22:13" (1/3) ... [2023-02-18 20:22:14,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee0f3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:22:14, skipping insertion in model container [2023-02-18 20:22:14,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:22:14" (2/3) ... [2023-02-18 20:22:14,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee0f3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:22:14, skipping insertion in model container [2023-02-18 20:22:14,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:22:14" (3/3) ... [2023-02-18 20:22:14,842 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2023-02-18 20:22:14,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:22:14,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-02-18 20:22:14,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:22:14,928 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;@7c8a9df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:22:14,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-02-18 20:22:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-18 20:22:14,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:14,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-18 20:22:14,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-18 20:22:14,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:14,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303717545] [2023-02-18 20:22:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:14,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303717545] [2023-02-18 20:22:15,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303717545] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:22:15,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:22:15,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:22:15,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561271900] [2023-02-18 20:22:15,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:22:15,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:22:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:22:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:22:15,252 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:15,325 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-18 20:22:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:22:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-18 20:22:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:15,334 INFO L225 Difference]: With dead ends: 50 [2023-02-18 20:22:15,334 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 20:22:15,336 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 [2023-02-18 20:22:15,341 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:15,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:22:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 20:22:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-18 20:22:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-18 20:22:15,376 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2023-02-18 20:22:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:15,380 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-18 20:22:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-18 20:22:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-18 20:22:15,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:15,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-18 20:22:15,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:22:15,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-18 20:22:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:15,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517804062] [2023-02-18 20:22:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:15,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:15,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517804062] [2023-02-18 20:22:15,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517804062] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:22:15,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:22:15,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:22:15,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590938872] [2023-02-18 20:22:15,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:22:15,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:22:15,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:22:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:22:15,485 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:15,509 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-02-18 20:22:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:22:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-18 20:22:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:15,511 INFO L225 Difference]: With dead ends: 47 [2023-02-18 20:22:15,512 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 20:22:15,513 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 [2023-02-18 20:22:15,515 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:15,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:22:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 20:22:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-18 20:22:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-02-18 20:22:15,523 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2023-02-18 20:22:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:15,524 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-02-18 20:22:15,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-02-18 20:22:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:22:15,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:15,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:22:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 20:22:15,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2023-02-18 20:22:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:15,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299914954] [2023-02-18 20:22:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:15,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299914954] [2023-02-18 20:22:15,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299914954] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:22:15,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:22:15,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:22:15,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223244834] [2023-02-18 20:22:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:22:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:22:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:22:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:22:15,602 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:15,637 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-18 20:22:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:22:15,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:22:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:15,638 INFO L225 Difference]: With dead ends: 44 [2023-02-18 20:22:15,639 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 20:22:15,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:22:15,640 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:15,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:22:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 20:22:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 20:22:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-02-18 20:22:15,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2023-02-18 20:22:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:15,645 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-02-18 20:22:15,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-02-18 20:22:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:22:15,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:15,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:22:15,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 20:22:15,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2023-02-18 20:22:15,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:15,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354822465] [2023-02-18 20:22:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:15,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354822465] [2023-02-18 20:22:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354822465] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:22:15,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:22:15,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:22:15,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528554106] [2023-02-18 20:22:15,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:22:15,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:22:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:15,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:22:15,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:22:15,832 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:15,932 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-02-18 20:22:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:22:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:22:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:15,935 INFO L225 Difference]: With dead ends: 51 [2023-02-18 20:22:15,935 INFO L226 Difference]: Without dead ends: 51 [2023-02-18 20:22:15,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:22:15,937 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:15,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 64 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:22:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-18 20:22:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-02-18 20:22:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-02-18 20:22:15,944 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 6 [2023-02-18 20:22:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:15,945 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-02-18 20:22:15,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-02-18 20:22:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 20:22:15,946 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:15,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:15,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 20:22:15,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash 59362067, now seen corresponding path program 1 times [2023-02-18 20:22:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:15,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001436603] [2023-02-18 20:22:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:15,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:15,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001436603] [2023-02-18 20:22:15,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001436603] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:22:15,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:22:15,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:22:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52753664] [2023-02-18 20:22:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:22:15,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:22:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:22:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:22:15,981 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:16,014 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-18 20:22:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:22:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 20:22:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:16,016 INFO L225 Difference]: With dead ends: 50 [2023-02-18 20:22:16,016 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 20:22:16,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:22:16,017 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:16,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:22:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 20:22:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2023-02-18 20:22:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-02-18 20:22:16,021 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 8 [2023-02-18 20:22:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:16,021 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-02-18 20:22:16,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-02-18 20:22:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 20:22:16,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:16,022 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:16,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 20:22:16,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:16,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2023-02-18 20:22:16,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:16,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875657817] [2023-02-18 20:22:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:16,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:16,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875657817] [2023-02-18 20:22:16,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875657817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:16,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658563685] [2023-02-18 20:22:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:16,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:16,245 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) [2023-02-18 20:22:16,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 20:22:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 20:22:16,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:16,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:22:16,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 31 [2023-02-18 20:22:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:16,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:22:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:16,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658563685] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:22:16,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:22:16,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-02-18 20:22:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149074530] [2023-02-18 20:22:16,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:22:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 20:22:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 20:22:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:22:16,638 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:16,887 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-02-18 20:22:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:22:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 20:22:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:16,895 INFO L225 Difference]: With dead ends: 67 [2023-02-18 20:22:16,895 INFO L226 Difference]: Without dead ends: 67 [2023-02-18 20:22:16,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-18 20:22:16,901 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 185 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:16,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 103 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:22:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-18 20:22:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-02-18 20:22:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.5) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-02-18 20:22:16,914 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 9 [2023-02-18 20:22:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:16,914 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-02-18 20:22:16,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-02-18 20:22:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 20:22:16,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:16,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:16,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 20:22:17,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 20:22:17,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:17,122 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2023-02-18 20:22:17,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:17,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078485419] [2023-02-18 20:22:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:17,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 20:22:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078485419] [2023-02-18 20:22:17,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078485419] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:22:17,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:22:17,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:22:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421709935] [2023-02-18 20:22:17,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:22:17,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:22:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:22:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:22:17,164 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:17,198 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-02-18 20:22:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:22:17,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 20:22:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:17,199 INFO L225 Difference]: With dead ends: 58 [2023-02-18 20:22:17,200 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 20:22:17,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:22:17,201 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:17,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:22:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 20:22:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-18 20:22:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-02-18 20:22:17,211 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 11 [2023-02-18 20:22:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:17,211 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-02-18 20:22:17,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-02-18 20:22:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 20:22:17,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:17,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:17,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 20:22:17,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2023-02-18 20:22:17,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:17,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940368812] [2023-02-18 20:22:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:17,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:17,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940368812] [2023-02-18 20:22:17,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940368812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183039642] [2023-02-18 20:22:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:17,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:17,258 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) [2023-02-18 20:22:17,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 20:22:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 20:22:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:17,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:22:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:17,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183039642] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:22:17,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:22:17,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-18 20:22:17,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2865174] [2023-02-18 20:22:17,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:22:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 20:22:17,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 20:22:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:22:17,376 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:17,437 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-02-18 20:22:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 20:22:17,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 20:22:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:17,438 INFO L225 Difference]: With dead ends: 60 [2023-02-18 20:22:17,438 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 20:22:17,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:22:17,440 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:17,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 87 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:22:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 20:22:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-02-18 20:22:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-02-18 20:22:17,446 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 11 [2023-02-18 20:22:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:17,447 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-02-18 20:22:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-02-18 20:22:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 20:22:17,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:17,448 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2023-02-18 20:22:17,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 20:22:17,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 20:22:17,654 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2023-02-18 20:22:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:17,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525659327] [2023-02-18 20:22:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:17,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:17,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525659327] [2023-02-18 20:22:17,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525659327] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:17,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991306820] [2023-02-18 20:22:17,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:22:17,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:17,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:17,860 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) [2023-02-18 20:22:17,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 20:22:17,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:22:17,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:22:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 20:22:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:17,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:22:17,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 37 [2023-02-18 20:22:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:18,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:22:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:18,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991306820] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:22:18,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:22:18,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-02-18 20:22:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065076282] [2023-02-18 20:22:18,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:22:18,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 20:22:18,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 20:22:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2023-02-18 20:22:18,498 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:19,116 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2023-02-18 20:22:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 20:22:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 20:22:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:19,117 INFO L225 Difference]: With dead ends: 103 [2023-02-18 20:22:19,118 INFO L226 Difference]: Without dead ends: 103 [2023-02-18 20:22:19,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 20:22:19,118 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 378 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:19,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 158 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 20:22:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-18 20:22:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2023-02-18 20:22:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-02-18 20:22:19,122 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 18 [2023-02-18 20:22:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:19,122 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-02-18 20:22:19,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-02-18 20:22:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 20:22:19,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:19,123 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:19,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 20:22:19,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:19,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:19,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1502042668, now seen corresponding path program 2 times [2023-02-18 20:22:19,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:19,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134606159] [2023-02-18 20:22:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:19,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:22:19,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:19,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134606159] [2023-02-18 20:22:19,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134606159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:19,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433818635] [2023-02-18 20:22:19,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:22:19,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:19,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:19,456 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) [2023-02-18 20:22:19,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 20:22:19,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-18 20:22:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:22:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 20:22:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:19,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:22:19,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-18 20:22:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 20:22:19,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:22:19,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433818635] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:22:19,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:22:19,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2023-02-18 20:22:19,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009649021] [2023-02-18 20:22:19,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:22:19,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:22:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:22:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:22:19,547 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:19,567 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-18 20:22:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:22:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 20:22:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:19,568 INFO L225 Difference]: With dead ends: 44 [2023-02-18 20:22:19,568 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 20:22:19,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:22:19,569 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:19,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:22:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 20:22:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 20:22:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-02-18 20:22:19,572 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2023-02-18 20:22:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:19,572 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-02-18 20:22:19,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-02-18 20:22:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 20:22:19,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:19,573 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:19,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 20:22:19,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:19,779 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 1 times [2023-02-18 20:22:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:19,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239403145] [2023-02-18 20:22:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:19,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:22:19,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:19,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239403145] [2023-02-18 20:22:19,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239403145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068930121] [2023-02-18 20:22:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:19,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:19,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:19,905 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) [2023-02-18 20:22:19,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 20:22:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:19,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 20:22:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:22:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:22:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:22:20,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068930121] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:22:20,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:22:20,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-02-18 20:22:20,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74478097] [2023-02-18 20:22:20,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:22:20,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 20:22:20,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 20:22:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2023-02-18 20:22:20,109 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:20,311 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2023-02-18 20:22:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 20:22:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 20:22:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:20,313 INFO L225 Difference]: With dead ends: 121 [2023-02-18 20:22:20,313 INFO L226 Difference]: Without dead ends: 121 [2023-02-18 20:22:20,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2023-02-18 20:22:20,314 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 267 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:20,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 32 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:22:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-18 20:22:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 74. [2023-02-18 20:22:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2023-02-18 20:22:20,319 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 29 [2023-02-18 20:22:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:20,319 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2023-02-18 20:22:20,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2023-02-18 20:22:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 20:22:20,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:20,322 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:20,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 20:22:20,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 20:22:20,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash -248790283, now seen corresponding path program 2 times [2023-02-18 20:22:20,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:20,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945559949] [2023-02-18 20:22:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:20,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:22:20,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:20,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945559949] [2023-02-18 20:22:20,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945559949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:20,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450250648] [2023-02-18 20:22:20,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:22:20,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:20,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:22:20,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 20:22:20,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:22:20,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:22:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 20:22:20,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:22:21,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:22:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:22:21,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450250648] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:22:21,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:22:21,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2023-02-18 20:22:21,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697793620] [2023-02-18 20:22:21,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:22:21,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 20:22:21,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 20:22:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 20:22:21,400 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:22,037 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2023-02-18 20:22:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 20:22:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-18 20:22:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:22,039 INFO L225 Difference]: With dead ends: 257 [2023-02-18 20:22:22,039 INFO L226 Difference]: Without dead ends: 257 [2023-02-18 20:22:22,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 20:22:22,041 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 536 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:22,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 49 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:22:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-18 20:22:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 146. [2023-02-18 20:22:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 145 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2023-02-18 20:22:22,057 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 53 [2023-02-18 20:22:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:22,057 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2023-02-18 20:22:22,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2023-02-18 20:22:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-18 20:22:22,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:22,059 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:22,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 20:22:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:22,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2038312715, now seen corresponding path program 3 times [2023-02-18 20:22:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:22,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26059610] [2023-02-18 20:22:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:22:23,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26059610] [2023-02-18 20:22:23,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26059610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228619061] [2023-02-18 20:22:23,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:22:23,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:23,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:22:23,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 20:22:23,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 20:22:23,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:22:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 20:22:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:23,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 20:22:23,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-18 20:22:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2023-02-18 20:22:23,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:22:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2023-02-18 20:22:23,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228619061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:22:23,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:22:23,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 7, 7] total 46 [2023-02-18 20:22:23,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359052103] [2023-02-18 20:22:23,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:22:23,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 20:22:23,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 20:22:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=1422, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 20:22:23,870 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:31,358 INFO L93 Difference]: Finished difference Result 276 states and 277 transitions. [2023-02-18 20:22:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-02-18 20:22:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-02-18 20:22:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:31,360 INFO L225 Difference]: With dead ends: 276 [2023-02-18 20:22:31,360 INFO L226 Difference]: Without dead ends: 276 [2023-02-18 20:22:31,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9140 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7833, Invalid=20559, Unknown=0, NotChecked=0, Total=28392 [2023-02-18 20:22:31,369 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:31,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 27 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 20:22:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-18 20:22:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 149. [2023-02-18 20:22:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.08843537414966) internal successors, (160), 148 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2023-02-18 20:22:31,373 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 101 [2023-02-18 20:22:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:31,373 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2023-02-18 20:22:31,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2023-02-18 20:22:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-18 20:22:31,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:31,375 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:31,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 20:22:31,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:31,581 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 396849146, now seen corresponding path program 4 times [2023-02-18 20:22:31,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:31,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420770693] [2023-02-18 20:22:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:31,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 20:22:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420770693] [2023-02-18 20:22:32,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420770693] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091648309] [2023-02-18 20:22:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 20:22:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:32,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:22:32,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 20:22:37,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 20:22:37,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:22:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 20:22:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:22:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 20:22:37,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:22:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 20:22:39,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091648309] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:22:39,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:22:39,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 100 [2023-02-18 20:22:39,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544594781] [2023-02-18 20:22:39,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:22:39,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-02-18 20:22:39,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:22:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-02-18 20:22:39,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4359, Invalid=5541, Unknown=0, NotChecked=0, Total=9900 [2023-02-18 20:22:39,089 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 100 states, 100 states have (on average 2.95) internal successors, (295), 100 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:22:41,072 INFO L93 Difference]: Finished difference Result 543 states and 544 transitions. [2023-02-18 20:22:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 20:22:41,073 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.95) internal successors, (295), 100 states have internal predecessors, (295), 0 states have call successors, (0), 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 113 [2023-02-18 20:22:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:22:41,075 INFO L225 Difference]: With dead ends: 543 [2023-02-18 20:22:41,075 INFO L226 Difference]: Without dead ends: 543 [2023-02-18 20:22:41,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6206 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6567, Invalid=10725, Unknown=0, NotChecked=0, Total=17292 [2023-02-18 20:22:41,078 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1596 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 20:22:41,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1596 Valid, 87 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 20:22:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-02-18 20:22:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 299. [2023-02-18 20:22:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.101010101010101) internal successors, (327), 298 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 327 transitions. [2023-02-18 20:22:41,084 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 327 transitions. Word has length 113 [2023-02-18 20:22:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:22:41,084 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 327 transitions. [2023-02-18 20:22:41,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.95) internal successors, (295), 100 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:22:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 327 transitions. [2023-02-18 20:22:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-02-18 20:22:41,087 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:22:41,087 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:22:41,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 20:22:41,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 20:22:41,297 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 20:22:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:22:41,297 INFO L85 PathProgramCache]: Analyzing trace with hash 293170132, now seen corresponding path program 5 times [2023-02-18 20:22:41,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:22:41,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23688301] [2023-02-18 20:22:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:22:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:22:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:22:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 20:22:44,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:22:44,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23688301] [2023-02-18 20:22:44,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23688301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:22:44,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436090814] [2023-02-18 20:22:44,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 20:22:44,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:22:44,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:22:44,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:22:44,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process