./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0234-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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/test-0234-2.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 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 01:47:48,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 01:47:48,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 01:47:48,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 01:47:48,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 01:47:48,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 01:47:48,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 01:47:48,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 01:47:48,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 01:47:48,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 01:47:48,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 01:47:48,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 01:47:48,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 01:47:48,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 01:47:48,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 01:47:48,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 01:47:48,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 01:47:48,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 01:47:48,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 01:47:48,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 01:47:48,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 01:47:48,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 01:47:48,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 01:47:48,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 01:47:48,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 01:47:48,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 01:47:48,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 01:47:48,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 01:47:48,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 01:47:48,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 01:47:48,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 01:47:48,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 01:47:48,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 01:47:48,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 01:47:48,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 01:47:48,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 01:47:48,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 01:47:48,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 01:47:48,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 01:47:48,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 01:47:48,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 01:47:48,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 01:47:48,371 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 01:47:48,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 01:47:48,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 01:47:48,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 01:47:48,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 01:47:48,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 01:47:48,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 01:47:48,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 01:47:48,374 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 01:47:48,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 01:47:48,374 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 01:47:48,374 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 01:47:48,375 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 01:47:48,376 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 01:47:48,376 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 01:47:48,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 01:47:48,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 01:47:48,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 01:47:48,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:47:48,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 01:47:48,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 01:47:48,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 01:47:48,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 01:47:48,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 01:47:48,377 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 01:47:48,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 01:47:48,378 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 01:47:48,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2023-02-14 01:47:48,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 01:47:48,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 01:47:48,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 01:47:48,634 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 01:47:48,635 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 01:47:48,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0234-2.i [2023-02-14 01:47:49,686 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 01:47:49,938 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 01:47:49,939 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0234-2.i [2023-02-14 01:47:49,947 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382816200/275754023ff644549afc28b208d30253/FLAGfb4b96343 [2023-02-14 01:47:49,961 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382816200/275754023ff644549afc28b208d30253 [2023-02-14 01:47:49,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 01:47:49,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 01:47:49,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 01:47:49,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 01:47:49,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 01:47:49,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:47:49" (1/1) ... [2023-02-14 01:47:49,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593f367d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:49, skipping insertion in model container [2023-02-14 01:47:49,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:47:49" (1/1) ... [2023-02-14 01:47:49,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 01:47:50,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 01:47:50,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:47:50,295 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 01:47:50,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:47:50,379 INFO L208 MainTranslator]: Completed translation [2023-02-14 01:47:50,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50 WrapperNode [2023-02-14 01:47:50,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 01:47:50,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 01:47:50,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 01:47:50,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 01:47:50,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,445 INFO L138 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2023-02-14 01:47:50,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 01:47:50,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 01:47:50,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 01:47:50,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 01:47:50,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 01:47:50,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 01:47:50,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 01:47:50,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 01:47:50,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (1/1) ... [2023-02-14 01:47:50,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:47:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:47:50,516 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) [2023-02-14 01:47:50,518 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 [2023-02-14 01:47:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 01:47:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 01:47:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 01:47:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 01:47:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-14 01:47:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-14 01:47:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 01:47:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 01:47:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 01:47:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 01:47:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 01:47:50,667 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 01:47:50,669 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 01:47:51,065 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 01:47:51,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 01:47:51,074 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-14 01:47:51,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:47:51 BoogieIcfgContainer [2023-02-14 01:47:51,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 01:47:51,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 01:47:51,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 01:47:51,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 01:47:51,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:47:49" (1/3) ... [2023-02-14 01:47:51,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775f441c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:47:51, skipping insertion in model container [2023-02-14 01:47:51,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:47:50" (2/3) ... [2023-02-14 01:47:51,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775f441c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:47:51, skipping insertion in model container [2023-02-14 01:47:51,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:47:51" (3/3) ... [2023-02-14 01:47:51,081 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2023-02-14 01:47:51,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 01:47:51,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2023-02-14 01:47:51,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 01:47:51,135 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;@35b7d81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 01:47:51,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-02-14 01:47:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:47:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-14 01:47:51,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:47:51,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-14 01:47:51,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:47:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:47:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-02-14 01:47:51,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:47:51,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502677161] [2023-02-14 01:47:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:51,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:47:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:47:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:47:51,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:47:51,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502677161] [2023-02-14 01:47:51,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502677161] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:47:51,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:47:51,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 01:47:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623363600] [2023-02-14 01:47:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:47:51,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 01:47:51,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:47:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 01:47:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 01:47:51,295 INFO L87 Difference]: Start difference. First operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:47:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:47:51,322 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2023-02-14 01:47:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 01:47:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-14 01:47:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:47:51,329 INFO L225 Difference]: With dead ends: 182 [2023-02-14 01:47:51,329 INFO L226 Difference]: Without dead ends: 180 [2023-02-14 01:47:51,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 01:47:51,333 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:47:51,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:47:51,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-14 01:47:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-02-14 01:47:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 103 states have (on average 1.7766990291262137) internal successors, (183), 172 states have internal predecessors, (183), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:47:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2023-02-14 01:47:51,364 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 4 [2023-02-14 01:47:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:47:51,364 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2023-02-14 01:47:51,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:47:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2023-02-14 01:47:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 01:47:51,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:47:51,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 01:47:51,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 01:47:51,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:47:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:47:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 889833681, now seen corresponding path program 1 times [2023-02-14 01:47:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:47:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115130678] [2023-02-14 01:47:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:47:51,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:47:51,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055523207] [2023-02-14 01:47:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:47:51,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:47:51,382 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) [2023-02-14 01:47:51,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 01:47:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:47:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 01:47:51,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:47:51,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:47:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:47:51,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:47:51,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:47:51,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115130678] [2023-02-14 01:47:51,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:47:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055523207] [2023-02-14 01:47:51,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055523207] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:47:51,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:47:51,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 01:47:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481408011] [2023-02-14 01:47:51,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:47:51,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 01:47:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:47:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 01:47:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:47:51,559 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:47:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:47:51,713 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2023-02-14 01:47:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 01:47:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-14 01:47:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:47:51,717 INFO L225 Difference]: With dead ends: 179 [2023-02-14 01:47:51,719 INFO L226 Difference]: Without dead ends: 179 [2023-02-14 01:47:51,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:47:51,720 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:47:51,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 302 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:47:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-14 01:47:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-02-14 01:47:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 103 states have (on average 1.766990291262136) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:47:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2023-02-14 01:47:51,740 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 6 [2023-02-14 01:47:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:47:51,741 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2023-02-14 01:47:51,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:47:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2023-02-14 01:47:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 01:47:51,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:47:51,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:47:51,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 01:47:51,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:47:51,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:47:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:47:51,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040656, now seen corresponding path program 1 times [2023-02-14 01:47:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:47:51,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594314549] [2023-02-14 01:47:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:51,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:47:51,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:47:51,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819256262] [2023-02-14 01:47:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:51,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:47:51,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:47:51,973 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) [2023-02-14 01:47:51,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 01:47:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:47:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 01:47:52,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:47:52,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 01:47:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:47:52,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:47:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:47:52,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594314549] [2023-02-14 01:47:52,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:47:52,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819256262] [2023-02-14 01:47:52,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819256262] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:47:52,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:47:52,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:47:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651459521] [2023-02-14 01:47:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:47:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:47:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:47:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:47:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:47:52,134 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:47:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:47:52,250 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2023-02-14 01:47:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:47:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-14 01:47:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:47:52,252 INFO L225 Difference]: With dead ends: 188 [2023-02-14 01:47:52,252 INFO L226 Difference]: Without dead ends: 188 [2023-02-14 01:47:52,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:47:52,253 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 16 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:47:52,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 494 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:47:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-14 01:47:52,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-02-14 01:47:52,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 111 states have (on average 1.7207207207207207) internal successors, (191), 179 states have internal predecessors, (191), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:47:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2023-02-14 01:47:52,272 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 7 [2023-02-14 01:47:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:47:52,272 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2023-02-14 01:47:52,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:47:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2023-02-14 01:47:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-14 01:47:52,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:47:52,278 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:47:52,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 01:47:52,480 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,SelfDestructingSolverStorable2 [2023-02-14 01:47:52,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:47:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:47:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1566187321, now seen corresponding path program 1 times [2023-02-14 01:47:52,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:47:52,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394862094] [2023-02-14 01:47:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:52,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:47:52,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:47:52,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660960794] [2023-02-14 01:47:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:52,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:47:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:47:52,522 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) [2023-02-14 01:47:52,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 01:47:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:47:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 01:47:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:47:52,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:47:52,861 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 15 treesize of output 11 [2023-02-14 01:47:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 01:47:53,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:47:53,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:47:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394862094] [2023-02-14 01:47:53,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:47:53,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660960794] [2023-02-14 01:47:53,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660960794] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:47:53,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:47:53,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:47:53,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575951032] [2023-02-14 01:47:53,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:47:53,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:47:53,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:47:53,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:47:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:47:53,019 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 01:47:55,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:47:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:47:59,299 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2023-02-14 01:47:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:47:59,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-02-14 01:47:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:47:59,301 INFO L225 Difference]: With dead ends: 200 [2023-02-14 01:47:59,301 INFO L226 Difference]: Without dead ends: 190 [2023-02-14 01:47:59,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:47:59,302 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 19 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:47:59,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 651 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-14 01:47:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-14 01:47:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-02-14 01:47:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 181 states have internal predecessors, (193), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:47:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 205 transitions. [2023-02-14 01:47:59,311 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 205 transitions. Word has length 66 [2023-02-14 01:47:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:47:59,311 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 205 transitions. [2023-02-14 01:47:59,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 01:47:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 205 transitions. [2023-02-14 01:47:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 01:47:59,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:47:59,313 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:47:59,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 01:47:59,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:47:59,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:47:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:47:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1361872350, now seen corresponding path program 1 times [2023-02-14 01:47:59,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:47:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124718784] [2023-02-14 01:47:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:59,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:47:59,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:47:59,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266875332] [2023-02-14 01:47:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:47:59,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:47:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:47:59,575 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) [2023-02-14 01:47:59,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 01:47:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:47:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 01:47:59,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:47:59,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:47:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-02-14 01:47:59,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 01:47:59,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:47:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124718784] [2023-02-14 01:47:59,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:47:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266875332] [2023-02-14 01:47:59,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266875332] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:47:59,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:47:59,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:47:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818620203] [2023-02-14 01:47:59,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:47:59,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:47:59,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:47:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:47:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:47:59,794 INFO L87 Difference]: Start difference. First operand 190 states and 205 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 01:47:59,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:47:59,869 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2023-02-14 01:47:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:47:59,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 71 [2023-02-14 01:47:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:47:59,871 INFO L225 Difference]: With dead ends: 189 [2023-02-14 01:47:59,871 INFO L226 Difference]: Without dead ends: 189 [2023-02-14 01:47:59,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:47:59,872 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 16 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:47:59,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 513 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:47:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-14 01:47:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-02-14 01:47:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 113 states have (on average 1.6991150442477876) internal successors, (192), 180 states have internal predecessors, (192), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:47:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 204 transitions. [2023-02-14 01:47:59,882 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 204 transitions. Word has length 71 [2023-02-14 01:47:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:47:59,882 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 204 transitions. [2023-02-14 01:47:59,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 01:47:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 204 transitions. [2023-02-14 01:47:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 01:47:59,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:47:59,884 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:47:59,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 01:48:00,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:00,091 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:48:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:48:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1029907146, now seen corresponding path program 1 times [2023-02-14 01:48:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:48:00,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555622655] [2023-02-14 01:48:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:00,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:48:00,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:48:00,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55188833] [2023-02-14 01:48:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:00,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:00,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:48:00,110 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) [2023-02-14 01:48:00,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 01:48:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:48:00,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 01:48:00,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:48:00,331 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_217 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_217))) is different from true [2023-02-14 01:48:00,389 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 01:48:00,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-14 01:48:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 1 not checked. [2023-02-14 01:48:00,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:48:00,576 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 01:48:00,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 01:48:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-14 01:48:00,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:48:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555622655] [2023-02-14 01:48:00,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:48:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55188833] [2023-02-14 01:48:00,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55188833] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:48:00,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:48:00,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-14 01:48:00,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387476702] [2023-02-14 01:48:00,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:48:00,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 01:48:00,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:48:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 01:48:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-14 01:48:00,594 INFO L87 Difference]: Start difference. First operand 189 states and 204 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 01:48:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:48:01,014 INFO L93 Difference]: Finished difference Result 227 states and 246 transitions. [2023-02-14 01:48:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 01:48:01,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-02-14 01:48:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:48:01,016 INFO L225 Difference]: With dead ends: 227 [2023-02-14 01:48:01,016 INFO L226 Difference]: Without dead ends: 227 [2023-02-14 01:48:01,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-14 01:48:01,017 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 126 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:48:01,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 1185 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 760 Invalid, 0 Unknown, 233 Unchecked, 0.3s Time] [2023-02-14 01:48:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-14 01:48:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 187. [2023-02-14 01:48:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 113 states have (on average 1.6814159292035398) internal successors, (190), 178 states have internal predecessors, (190), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:48:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2023-02-14 01:48:01,022 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 79 [2023-02-14 01:48:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:48:01,022 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2023-02-14 01:48:01,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 01:48:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2023-02-14 01:48:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 01:48:01,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:48:01,024 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:48:01,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 01:48:01,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:01,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:48:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:48:01,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1029907147, now seen corresponding path program 1 times [2023-02-14 01:48:01,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:48:01,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749740503] [2023-02-14 01:48:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:01,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:48:01,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:48:01,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308145419] [2023-02-14 01:48:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:01,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:01,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:48:01,268 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) [2023-02-14 01:48:01,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 01:48:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:48:01,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 01:48:01,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:48:01,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:48:01,582 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 15 treesize of output 11 [2023-02-14 01:48:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-14 01:48:02,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:48:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-14 01:48:02,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:48:02,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749740503] [2023-02-14 01:48:02,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:48:02,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308145419] [2023-02-14 01:48:02,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308145419] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:48:02,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:48:02,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-14 01:48:02,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179235671] [2023-02-14 01:48:02,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:48:02,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 01:48:02,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:48:02,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 01:48:02,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-14 01:48:02,554 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-14 01:48:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:48:04,835 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2023-02-14 01:48:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 01:48:04,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 79 [2023-02-14 01:48:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:48:04,836 INFO L225 Difference]: With dead ends: 206 [2023-02-14 01:48:04,836 INFO L226 Difference]: Without dead ends: 191 [2023-02-14 01:48:04,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2023-02-14 01:48:04,837 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 42 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 01:48:04,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1117 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 01:48:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-14 01:48:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-02-14 01:48:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 117 states have (on average 1.6581196581196582) internal successors, (194), 182 states have internal predecessors, (194), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:48:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2023-02-14 01:48:04,841 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 79 [2023-02-14 01:48:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:48:04,841 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2023-02-14 01:48:04,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-14 01:48:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2023-02-14 01:48:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 01:48:04,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:48:04,842 INFO L195 NwaCegarLoop]: trace histogram [14, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:48:04,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 01:48:05,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:05,049 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:48:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:48:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1077320971, now seen corresponding path program 2 times [2023-02-14 01:48:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:48:05,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331869974] [2023-02-14 01:48:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:05,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:48:05,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:48:05,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667018196] [2023-02-14 01:48:05,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:48:05,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:05,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:48:05,106 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) [2023-02-14 01:48:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 01:48:05,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:48:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:48:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 01:48:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:48:05,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:48:05,576 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 13 treesize of output 9 [2023-02-14 01:48:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-14 01:48:05,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:48:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-14 01:48:05,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:48:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331869974] [2023-02-14 01:48:05,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:48:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667018196] [2023-02-14 01:48:05,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667018196] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:48:05,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:48:05,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-14 01:48:05,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058489647] [2023-02-14 01:48:05,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:48:05,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 01:48:05,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:48:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 01:48:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-02-14 01:48:05,906 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-14 01:48:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:48:06,640 INFO L93 Difference]: Finished difference Result 225 states and 244 transitions. [2023-02-14 01:48:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 01:48:06,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 87 [2023-02-14 01:48:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:48:06,642 INFO L225 Difference]: With dead ends: 225 [2023-02-14 01:48:06,642 INFO L226 Difference]: Without dead ends: 200 [2023-02-14 01:48:06,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 01:48:06,643 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 91 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:48:06,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1376 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:48:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-14 01:48:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-02-14 01:48:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 126 states have (on average 1.6111111111111112) internal successors, (203), 191 states have internal predecessors, (203), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:48:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 215 transitions. [2023-02-14 01:48:06,647 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 215 transitions. Word has length 87 [2023-02-14 01:48:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:48:06,647 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 215 transitions. [2023-02-14 01:48:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-14 01:48:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 215 transitions. [2023-02-14 01:48:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-14 01:48:06,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:48:06,648 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:48:06,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 01:48:06,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:06,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:48:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:48:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2075783508, now seen corresponding path program 3 times [2023-02-14 01:48:06,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:48:06,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943381086] [2023-02-14 01:48:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:06,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:48:06,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:48:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130445997] [2023-02-14 01:48:06,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:48:06,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:06,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:48:06,906 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) [2023-02-14 01:48:06,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 01:48:08,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 01:48:08,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:48:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 01:48:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:48:08,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:48:08,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:48:08,640 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_961 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_961) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 01:48:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:48:08,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 01:48:08,697 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 01:48:08,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 01:48:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 73 not checked. [2023-02-14 01:48:08,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:48:10,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:48:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943381086] [2023-02-14 01:48:10,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:48:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130445997] [2023-02-14 01:48:10,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130445997] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:48:10,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 01:48:10,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 01:48:10,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050067576] [2023-02-14 01:48:10,809 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 01:48:10,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 01:48:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:48:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 01:48:10,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=130, Unknown=1, NotChecked=22, Total=182 [2023-02-14 01:48:10,810 INFO L87 Difference]: Start difference. First operand 200 states and 215 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:48:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:48:11,391 INFO L93 Difference]: Finished difference Result 244 states and 266 transitions. [2023-02-14 01:48:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 01:48:11,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 108 [2023-02-14 01:48:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:48:11,402 INFO L225 Difference]: With dead ends: 244 [2023-02-14 01:48:11,402 INFO L226 Difference]: Without dead ends: 244 [2023-02-14 01:48:11,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=64, Invalid=245, Unknown=1, NotChecked=32, Total=342 [2023-02-14 01:48:11,405 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 208 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 01:48:11,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 823 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 985 Invalid, 0 Unknown, 233 Unchecked, 0.4s Time] [2023-02-14 01:48:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-14 01:48:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 198. [2023-02-14 01:48:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 126 states have (on average 1.5952380952380953) internal successors, (201), 189 states have internal predecessors, (201), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:48:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2023-02-14 01:48:11,411 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 108 [2023-02-14 01:48:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:48:11,412 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2023-02-14 01:48:11,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:48:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2023-02-14 01:48:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-14 01:48:11,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:48:11,413 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:48:11,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 01:48:11,621 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,SelfDestructingSolverStorable8 [2023-02-14 01:48:11,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:48:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:48:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1963125108, now seen corresponding path program 1 times [2023-02-14 01:48:11,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:48:11,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508262452] [2023-02-14 01:48:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:48:11,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:48:11,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623569152] [2023-02-14 01:48:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:11,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:11,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:48:11,671 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) [2023-02-14 01:48:11,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 01:48:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:48:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-14 01:48:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:48:12,016 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1421 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1421))) is different from true [2023-02-14 01:48:12,103 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 01:48:12,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-14 01:48:12,117 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1422 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1422))) is different from true [2023-02-14 01:48:12,176 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 01:48:12,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-14 01:48:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 485 proven. 114 refuted. 0 times theorem prover too weak. 338 trivial. 3 not checked. [2023-02-14 01:48:12,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:48:12,398 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 01:48:12,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 01:48:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 485 proven. 116 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-02-14 01:48:12,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:48:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508262452] [2023-02-14 01:48:12,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:48:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623569152] [2023-02-14 01:48:12,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623569152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:48:12,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:48:12,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2023-02-14 01:48:12,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466668326] [2023-02-14 01:48:12,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:48:12,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 01:48:12,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:48:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 01:48:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2023-02-14 01:48:12,410 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 01:48:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:48:12,770 INFO L93 Difference]: Finished difference Result 235 states and 254 transitions. [2023-02-14 01:48:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 01:48:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2023-02-14 01:48:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:48:12,771 INFO L225 Difference]: With dead ends: 235 [2023-02-14 01:48:12,771 INFO L226 Difference]: Without dead ends: 235 [2023-02-14 01:48:12,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 198 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=372, Unknown=2, NotChecked=82, Total=552 [2023-02-14 01:48:12,772 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 223 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:48:12,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1187 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 825 Invalid, 0 Unknown, 456 Unchecked, 0.3s Time] [2023-02-14 01:48:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-02-14 01:48:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 195. [2023-02-14 01:48:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.5714285714285714) internal successors, (198), 186 states have internal predecessors, (198), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 01:48:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 210 transitions. [2023-02-14 01:48:12,775 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 210 transitions. Word has length 110 [2023-02-14 01:48:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:48:12,776 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 210 transitions. [2023-02-14 01:48:12,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 01:48:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 210 transitions. [2023-02-14 01:48:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-14 01:48:12,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:48:12,777 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:48:12,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 01:48:12,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 01:48:12,977 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:48:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:48:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1963125109, now seen corresponding path program 1 times [2023-02-14 01:48:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:48:12,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737974330] [2023-02-14 01:48:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:48:13,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:48:13,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047338108] [2023-02-14 01:48:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:48:13,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:48:13,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:48:13,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:48:13,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 01:48:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:48:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-14 01:48:13,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:48:13,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:48:28,115 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1886 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1886) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|)))) is different from true [2023-02-14 01:48:28,325 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1886 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1886) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 01:48:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:48:28,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:48:28,419 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 01:48:28,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 01:48:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 394 proven. 221 refuted. 0 times theorem prover too weak. 233 trivial. 92 not checked. [2023-02-14 01:48:28,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:48:29,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:48:29,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737974330] [2023-02-14 01:48:29,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:48:29,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047338108] [2023-02-14 01:48:29,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047338108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:48:29,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 01:48:29,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-14 01:48:29,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252852485] [2023-02-14 01:48:29,461 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 01:48:29,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 01:48:29,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:48:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 01:48:29,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=846, Unknown=9, NotChecked=118, Total=1056 [2023-02-14 01:48:29,462 INFO L87 Difference]: Start difference. First operand 195 states and 210 transitions. Second operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:48:31,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:48:33,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:48:37,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:48:39,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:48:43,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:48:50,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:48:54,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:48:58,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:00,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:02,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:08,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:15,106 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:49:23,855 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:49:25,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:27,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:49:29,208 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2023-02-14 01:49:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 01:49:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 110 [2023-02-14 01:49:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:49:29,209 INFO L225 Difference]: With dead ends: 204 [2023-02-14 01:49:29,209 INFO L226 Difference]: Without dead ends: 201 [2023-02-14 01:49:29,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=196, Invalid=1603, Unknown=15, NotChecked=166, Total=1980 [2023-02-14 01:49:29,210 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 45 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 6 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:49:29,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3182 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2130 Invalid, 13 Unknown, 385 Unchecked, 28.0s Time] [2023-02-14 01:49:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-14 01:49:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-02-14 01:49:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 131 states have (on average 1.5572519083969465) internal successors, (204), 192 states have internal predecessors, (204), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 01:49:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 220 transitions. [2023-02-14 01:49:29,218 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 220 transitions. Word has length 110 [2023-02-14 01:49:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:49:29,219 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 220 transitions. [2023-02-14 01:49:29,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:49:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 220 transitions. [2023-02-14 01:49:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-14 01:49:29,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:49:29,220 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:49:29,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 01:49:29,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 01:49:29,420 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:49:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:49:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash -675336400, now seen corresponding path program 2 times [2023-02-14 01:49:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:49:29,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800225303] [2023-02-14 01:49:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:49:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:49:29,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:49:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600940773] [2023-02-14 01:49:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:49:29,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:49:29,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:49:29,451 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:49:29,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 01:49:29,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:49:29,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:49:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-14 01:49:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:49:29,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 01:49:38,980 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2360 Int) (v_ArrVal_2359 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2360)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2359) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 01:49:39,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:49:39,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:49:39,086 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 01:49:39,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 01:49:39,200 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2361 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2361) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 01:49:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:49:39,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:49:39,341 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 01:49:39,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 01:49:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 411 proven. 97 refuted. 0 times theorem prover too weak. 195 trivial. 278 not checked. [2023-02-14 01:49:40,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:49:42,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:49:42,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800225303] [2023-02-14 01:49:42,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:49:42,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600940773] [2023-02-14 01:49:42,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600940773] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:49:42,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 01:49:42,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-14 01:49:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723121000] [2023-02-14 01:49:42,406 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 01:49:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 01:49:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:49:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 01:49:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=493, Unknown=5, NotChecked=90, Total=650 [2023-02-14 01:49:42,408 INFO L87 Difference]: Start difference. First operand 201 states and 220 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:49:44,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:46,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:48,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:52,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:49:56,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:50:01,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:50:05,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:50:25,637 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:50:39,144 WARN L233 SmtUtils]: Spent 12.74s on a formula simplification. DAG size of input: 62 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:50:59,301 WARN L233 SmtUtils]: Spent 19.55s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:51:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:51:05,442 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2023-02-14 01:51:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 01:51:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 111 [2023-02-14 01:51:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:51:05,443 INFO L225 Difference]: With dead ends: 238 [2023-02-14 01:51:05,443 INFO L226 Difference]: Without dead ends: 238 [2023-02-14 01:51:05,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 74.7s TimeCoverageRelationStatistics Valid=163, Invalid=1164, Unknown=13, NotChecked=142, Total=1482 [2023-02-14 01:51:05,444 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 417 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 20 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:51:05,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1696 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1784 Invalid, 7 Unknown, 383 Unchecked, 19.7s Time] [2023-02-14 01:51:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-14 01:51:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2023-02-14 01:51:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 131 states have (on average 1.5419847328244274) internal successors, (202), 190 states have internal predecessors, (202), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 01:51:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 218 transitions. [2023-02-14 01:51:05,448 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 218 transitions. Word has length 111 [2023-02-14 01:51:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:51:05,448 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 218 transitions. [2023-02-14 01:51:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:51:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 218 transitions. [2023-02-14 01:51:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-14 01:51:05,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:51:05,449 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:51:05,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 01:51:05,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 01:51:05,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:51:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:51:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1952847899, now seen corresponding path program 1 times [2023-02-14 01:51:05,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:51:05,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162898321] [2023-02-14 01:51:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:51:05,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:51:05,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:51:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107078415] [2023-02-14 01:51:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:51:05,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:51:05,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:51:05,681 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:51:05,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 01:51:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:51:05,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 01:51:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:51:06,060 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_2857 Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2857)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 01:51:06,105 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 01:51:06,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 01:51:06,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_2858))) is different from true [2023-02-14 01:51:06,130 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_2858))) is different from true [2023-02-14 01:51:06,133 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_2858))) is different from true [2023-02-14 01:51:06,136 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_2858))) is different from true [2023-02-14 01:51:06,147 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:51:06,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-14 01:51:06,199 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2859 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2859))) is different from true [2023-02-14 01:51:06,293 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:51:06,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 01:51:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 425 proven. 72 refuted. 0 times theorem prover too weak. 185 trivial. 299 not checked. [2023-02-14 01:51:06,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:51:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:51:07,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162898321] [2023-02-14 01:51:07,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:51:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107078415] [2023-02-14 01:51:07,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107078415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:51:07,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 01:51:07,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-14 01:51:07,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175637151] [2023-02-14 01:51:07,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 01:51:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 01:51:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:51:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 01:51:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=484, Unknown=6, NotChecked=294, Total=870 [2023-02-14 01:51:07,074 INFO L87 Difference]: Start difference. First operand 199 states and 218 transitions. Second operand has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 01:51:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:51:07,755 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2023-02-14 01:51:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 01:51:07,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 118 [2023-02-14 01:51:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:51:07,770 INFO L225 Difference]: With dead ends: 233 [2023-02-14 01:51:07,771 INFO L226 Difference]: Without dead ends: 233 [2023-02-14 01:51:07,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=779, Unknown=6, NotChecked=378, Total=1332 [2023-02-14 01:51:07,773 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 294 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 30 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 1145 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:51:07,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1199 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 804 Invalid, 33 Unknown, 1145 Unchecked, 0.5s Time] [2023-02-14 01:51:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-14 01:51:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 196. [2023-02-14 01:51:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 131 states have (on average 1.5190839694656488) internal successors, (199), 187 states have internal predecessors, (199), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 01:51:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2023-02-14 01:51:07,779 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 118 [2023-02-14 01:51:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:51:07,780 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2023-02-14 01:51:07,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 01:51:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2023-02-14 01:51:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-14 01:51:07,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:51:07,781 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:51:07,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 01:51:07,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 01:51:07,989 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-14 01:51:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:51:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1952847898, now seen corresponding path program 1 times [2023-02-14 01:51:07,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:51:07,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917653662] [2023-02-14 01:51:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:51:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:51:08,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 01:51:08,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501181222] [2023-02-14 01:51:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:51:08,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:51:08,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:51:08,049 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:51:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 01:51:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:51:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-14 01:51:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:51:09,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-02-14 01:51:19,243 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_3362 Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3362)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 01:51:19,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:51:19,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:51:19,478 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 01:51:19,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 01:51:28,083 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 17 treesize of output 13 [2023-02-14 01:51:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 493 proven. 78 refuted. 0 times theorem prover too weak. 338 trivial. 72 not checked. [2023-02-14 01:51:38,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:51:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:51:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917653662] [2023-02-14 01:51:40,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 01:51:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501181222] [2023-02-14 01:51:40,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501181222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:51:40,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 01:51:40,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-14 01:51:40,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581033347] [2023-02-14 01:51:40,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 01:51:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 01:51:40,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:51:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 01:51:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=731, Unknown=16, NotChecked=54, Total=870 [2023-02-14 01:51:40,962 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:51:42,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:51:45,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:51:47,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:51:49,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:51:51,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:51:55,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:51:57,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:51:59,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:05,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:07,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:09,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:15,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:17,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:19,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:27,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:29,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 01:52:31,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]