./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0234-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0234-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:36:51,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:36:51,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:36:51,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:36:51,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:36:51,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:36:51,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:36:51,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:36:51,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:36:51,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:36:51,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:36:51,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:36:51,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:36:51,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:36:51,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:36:51,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:36:51,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:36:51,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:36:51,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:36:51,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:36:51,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:36:51,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:36:51,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:36:51,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:36:51,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:36:51,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:36:51,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:36:51,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:36:51,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:36:51,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:36:51,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:36:51,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:36:51,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:36:51,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:36:51,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:36:51,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:36:51,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:36:51,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:36:51,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:36:51,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:36:51,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:36:51,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:36:51,253 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:36:51,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:36:51,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:36:51,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:36:51,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:36:51,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:36:51,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:36:51,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:36:51,256 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:36:51,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:36:51,257 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:36:51,257 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:36:51,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:36:51,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:36:51,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:36:51,258 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:36:51,258 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:36:51,259 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:36:51,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:36:51,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:36:51,259 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:36:51,259 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:36:51,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:36:51,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:36:51,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:36:51,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:36:51,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:36:51,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:36:51,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:36:51,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:36:51,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:36:51,262 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:36:51,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:36:51,262 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:36:51,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2023-02-18 20:36:51,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:36:51,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:36:51,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:36:51,550 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:36:51,551 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:36:51,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0234-1.i [2023-02-18 20:36:52,689 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:36:52,962 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:36:52,962 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0234-1.i [2023-02-18 20:36:52,971 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dcda8028/f8f66d6713484ff999067bb462f4d7a2/FLAGafcfc6ee1 [2023-02-18 20:36:52,983 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dcda8028/f8f66d6713484ff999067bb462f4d7a2 [2023-02-18 20:36:52,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:36:52,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:36:52,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:36:52,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:36:52,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:36:52,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:36:52" (1/1) ... [2023-02-18 20:36:52,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc1d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:52, skipping insertion in model container [2023-02-18 20:36:52,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:36:52" (1/1) ... [2023-02-18 20:36:53,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:36:53,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:36:53,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:36:53,370 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:36:53,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:36:53,444 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:36:53,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53 WrapperNode [2023-02-18 20:36:53,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:36:53,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:36:53,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:36:53,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:36:53,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,489 INFO L138 Inliner]: procedures = 188, calls = 60, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 203 [2023-02-18 20:36:53,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:36:53,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:36:53,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:36:53,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:36:53,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,515 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:36:53,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:36:53,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:36:53,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:36:53,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (1/1) ... [2023-02-18 20:36:53,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:36:53,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:36:53,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 20:36:53,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 20:36:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 20:36:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 20:36:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 20:36:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 20:36:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-18 20:36:53,588 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-18 20:36:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:36:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 20:36:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 20:36:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:36:53,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:36:53,699 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:36:53,701 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:36:54,126 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:36:54,133 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:36:54,134 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-18 20:36:54,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:36:54 BoogieIcfgContainer [2023-02-18 20:36:54,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:36:54,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:36:54,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:36:54,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:36:54,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:36:52" (1/3) ... [2023-02-18 20:36:54,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2d0078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:36:54, skipping insertion in model container [2023-02-18 20:36:54,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:36:53" (2/3) ... [2023-02-18 20:36:54,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2d0078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:36:54, skipping insertion in model container [2023-02-18 20:36:54,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:36:54" (3/3) ... [2023-02-18 20:36:54,144 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2023-02-18 20:36:54,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:36:54,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2023-02-18 20:36:54,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:36:54,200 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;@67514299, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:36:54,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-02-18 20:36:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 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) [2023-02-18 20:36:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 20:36:54,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:36:54,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 20:36:54,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:36:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:36:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-02-18 20:36:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:36:54,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88769185] [2023-02-18 20:36:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:36:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:36:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:36:54,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:36:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88769185] [2023-02-18 20:36:54,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88769185] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:36:54,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:36:54,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:36:54,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873648545] [2023-02-18 20:36:54,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:36:54,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 20:36:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:36:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 20:36:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 20:36:54,379 INFO L87 Difference]: Start difference. First operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 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) [2023-02-18 20:36:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:36:54,417 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2023-02-18 20:36:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 20:36:54,419 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 [2023-02-18 20:36:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:36:54,426 INFO L225 Difference]: With dead ends: 191 [2023-02-18 20:36:54,426 INFO L226 Difference]: Without dead ends: 189 [2023-02-18 20:36:54,428 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 [2023-02-18 20:36:54,433 INFO L413 NwaCegarLoop]: 206 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, 206 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 [2023-02-18 20:36:54,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:36:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-18 20:36:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-02-18 20:36:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 107 states have (on average 1.794392523364486) internal successors, (192), 181 states have internal predecessors, (192), 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) [2023-02-18 20:36:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 204 transitions. [2023-02-18 20:36:54,488 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 204 transitions. Word has length 4 [2023-02-18 20:36:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:36:54,488 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 204 transitions. [2023-02-18 20:36:54,488 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) [2023-02-18 20:36:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 204 transitions. [2023-02-18 20:36:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:36:54,489 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:36:54,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:36:54,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:36:54,490 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:36:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:36:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 889842618, now seen corresponding path program 1 times [2023-02-18 20:36:54,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:36:54,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972458505] [2023-02-18 20:36:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:36:54,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:36:54,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782509772] [2023-02-18 20:36:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:36:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:36:54,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:36:54,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 20:36:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:36:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 20:36:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:36:54,644 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 [2023-02-18 20:36:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:36:54,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:36:54,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:36:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972458505] [2023-02-18 20:36:54,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:36:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782509772] [2023-02-18 20:36:54,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782509772] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:36:54,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:36:54,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:36:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836446804] [2023-02-18 20:36:54,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:36:54,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:36:54,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:36:54,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:36:54,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:36:54,659 INFO L87 Difference]: Start difference. First operand 189 states and 204 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) [2023-02-18 20:36:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:36:54,813 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2023-02-18 20:36:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:36:54,816 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 [2023-02-18 20:36:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:36:54,822 INFO L225 Difference]: With dead ends: 188 [2023-02-18 20:36:54,822 INFO L226 Difference]: Without dead ends: 188 [2023-02-18 20:36:54,822 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 [2023-02-18 20:36:54,823 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:36:54,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:36:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-18 20:36:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-02-18 20:36:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 107 states have (on average 1.7850467289719627) internal successors, (191), 180 states have internal predecessors, (191), 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) [2023-02-18 20:36:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2023-02-18 20:36:54,850 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 6 [2023-02-18 20:36:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:36:54,851 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2023-02-18 20:36:54,851 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) [2023-02-18 20:36:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2023-02-18 20:36:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 20:36:54,851 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:36:54,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:36:54,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 20:36:55,057 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 [2023-02-18 20:36:55,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:36:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:36:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1815317712, now seen corresponding path program 1 times [2023-02-18 20:36:55,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:36:55,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963020998] [2023-02-18 20:36:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:55,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:36:55,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:36:55,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192623826] [2023-02-18 20:36:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:55,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:36:55,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:36:55,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:36:55,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 20:36:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:36:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 20:36:55,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:36:55,240 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 [2023-02-18 20:36:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:36:55,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:36:55,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:36:55,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963020998] [2023-02-18 20:36:55,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:36:55,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192623826] [2023-02-18 20:36:55,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192623826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:36:55,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:36:55,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:36:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364455812] [2023-02-18 20:36:55,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:36:55,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:36:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:36:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:36:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:36:55,251 INFO L87 Difference]: Start difference. First operand 188 states and 203 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) [2023-02-18 20:36:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:36:55,390 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2023-02-18 20:36:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:36:55,391 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 [2023-02-18 20:36:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:36:55,392 INFO L225 Difference]: With dead ends: 197 [2023-02-18 20:36:55,392 INFO L226 Difference]: Without dead ends: 197 [2023-02-18 20:36:55,393 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 [2023-02-18 20:36:55,395 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:36:55,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 519 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:36:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-18 20:36:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-02-18 20:36:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 115 states have (on average 1.7391304347826086) internal successors, (200), 188 states have internal predecessors, (200), 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) [2023-02-18 20:36:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2023-02-18 20:36:55,422 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 7 [2023-02-18 20:36:55,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:36:55,422 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2023-02-18 20:36:55,422 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) [2023-02-18 20:36:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2023-02-18 20:36:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-18 20:36:55,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:36:55,425 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] [2023-02-18 20:36:55,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 20:36:55,631 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 [2023-02-18 20:36:55,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:36:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:36:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1660157209, now seen corresponding path program 1 times [2023-02-18 20:36:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:36:55,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152715846] [2023-02-18 20:36:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:36:55,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:36:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126421813] [2023-02-18 20:36:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:55,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:36:55,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:36:55,695 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:36:55,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 20:36:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:36:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 20:36:55,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:36:55,933 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 [2023-02-18 20:36:55,995 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 19 treesize of output 15 [2023-02-18 20:36:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 20:36:56,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:36:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:36:56,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152715846] [2023-02-18 20:36:56,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:36:56,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126421813] [2023-02-18 20:36:56,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126421813] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:36:56,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:36:56,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:36:56,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671894762] [2023-02-18 20:36:56,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:36:56,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:36:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:36:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:36:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:36:56,202 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 20:36:58,269 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] [2023-02-18 20:36:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:36:59,379 INFO L93 Difference]: Finished difference Result 209 states and 224 transitions. [2023-02-18 20:36:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:36:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-02-18 20:36:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:36:59,381 INFO L225 Difference]: With dead ends: 209 [2023-02-18 20:36:59,381 INFO L226 Difference]: Without dead ends: 199 [2023-02-18 20:36:59,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:36:59,382 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 19 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:36:59,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 685 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 20:36:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-18 20:36:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2023-02-18 20:36:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 117 states have (on average 1.7264957264957266) internal successors, (202), 190 states have internal predecessors, (202), 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) [2023-02-18 20:36:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 214 transitions. [2023-02-18 20:36:59,389 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 214 transitions. Word has length 66 [2023-02-18 20:36:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:36:59,389 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 214 transitions. [2023-02-18 20:36:59,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 20:36:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 214 transitions. [2023-02-18 20:36:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 20:36:59,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:36:59,392 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] [2023-02-18 20:36:59,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 20:36:59,599 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 [2023-02-18 20:36:59,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:36:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:36:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -359143275, now seen corresponding path program 1 times [2023-02-18 20:36:59,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:36:59,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979235441] [2023-02-18 20:36:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:59,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:36:59,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:36:59,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371972564] [2023-02-18 20:36:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:36:59,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:36:59,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:36:59,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:36:59,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 20:36:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:36:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 20:36:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:36:59,859 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 [2023-02-18 20:36:59,868 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 [2023-02-18 20:36:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-18 20:36:59,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:37:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-18 20:37:00,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:37:00,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979235441] [2023-02-18 20:37:00,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:37:00,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371972564] [2023-02-18 20:37:00,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371972564] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:37:00,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:37:00,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-02-18 20:37:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178558285] [2023-02-18 20:37:00,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:37:00,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 20:37:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:37:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 20:37:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:37:00,016 INFO L87 Difference]: Start difference. First operand 199 states and 214 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 20:37:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:37:00,260 INFO L93 Difference]: Finished difference Result 225 states and 242 transitions. [2023-02-18 20:37:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:37:00,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2023-02-18 20:37:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:37:00,262 INFO L225 Difference]: With dead ends: 225 [2023-02-18 20:37:00,262 INFO L226 Difference]: Without dead ends: 205 [2023-02-18 20:37:00,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-02-18 20:37:00,264 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 28 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:37:00,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 820 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:37:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-18 20:37:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-02-18 20:37:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 123 states have (on average 1.6910569105691058) internal successors, (208), 196 states have internal predecessors, (208), 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) [2023-02-18 20:37:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 220 transitions. [2023-02-18 20:37:00,269 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 220 transitions. Word has length 71 [2023-02-18 20:37:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:37:00,270 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 220 transitions. [2023-02-18 20:37:00,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 20:37:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 220 transitions. [2023-02-18 20:37:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 20:37:00,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:37:00,272 INFO L195 NwaCegarLoop]: trace histogram [20, 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] [2023-02-18 20:37:00,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 20:37:00,480 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 [2023-02-18 20:37:00,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:37:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:37:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2015734887, now seen corresponding path program 2 times [2023-02-18 20:37:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:37:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282995012] [2023-02-18 20:37:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:37:00,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:37:00,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800200618] [2023-02-18 20:37:00,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:37:00,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:37:00,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:37:00,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:37:00,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 20:37:01,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:37:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:37:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 20:37:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:37:01,173 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 [2023-02-18 20:37:01,184 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 [2023-02-18 20:37:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 220 proven. 36 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-18 20:37:01,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:37:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 47 proven. 106 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-18 20:37:01,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:37:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282995012] [2023-02-18 20:37:01,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:37:01,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800200618] [2023-02-18 20:37:01,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800200618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:37:01,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:37:01,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-18 20:37:01,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821706924] [2023-02-18 20:37:01,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:37:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 20:37:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:37:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 20:37:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-02-18 20:37:01,489 INFO L87 Difference]: Start difference. First operand 205 states and 220 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 20:37:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:37:01,868 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2023-02-18 20:37:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 20:37:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2023-02-18 20:37:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:37:01,870 INFO L225 Difference]: With dead ends: 233 [2023-02-18 20:37:01,870 INFO L226 Difference]: Without dead ends: 213 [2023-02-18 20:37:01,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2023-02-18 20:37:01,871 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 44 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:37:01,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2200 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:37:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-02-18 20:37:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-02-18 20:37:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 131 states have (on average 1.6488549618320612) internal successors, (216), 204 states have internal predecessors, (216), 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) [2023-02-18 20:37:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 228 transitions. [2023-02-18 20:37:01,877 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 228 transitions. Word has length 86 [2023-02-18 20:37:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:37:01,878 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 228 transitions. [2023-02-18 20:37:01,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 20:37:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 228 transitions. [2023-02-18 20:37:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 20:37:01,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:37:01,880 INFO L195 NwaCegarLoop]: trace histogram [40, 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] [2023-02-18 20:37:01,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 20:37:02,101 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 [2023-02-18 20:37:02,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:37:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:37:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1853789671, now seen corresponding path program 3 times [2023-02-18 20:37:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:37:02,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063580312] [2023-02-18 20:37:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:37:02,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:37:02,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53980423] [2023-02-18 20:37:02,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:37:02,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:37:02,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:37:02,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:37:02,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 20:37:02,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 20:37:02,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:37:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 20:37:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:37:02,346 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 [2023-02-18 20:37:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-02-18 20:37:02,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:37:02,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:37:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063580312] [2023-02-18 20:37:02,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:37:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53980423] [2023-02-18 20:37:02,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53980423] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:37:02,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:37:02,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:37:02,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824259101] [2023-02-18 20:37:02,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:37:02,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:37:02,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:37:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:37:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:37:02,353 INFO L87 Difference]: Start difference. First operand 213 states and 228 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) [2023-02-18 20:37:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:37:02,447 INFO L93 Difference]: Finished difference Result 212 states and 227 transitions. [2023-02-18 20:37:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:37:02,447 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 106 [2023-02-18 20:37:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:37:02,449 INFO L225 Difference]: With dead ends: 212 [2023-02-18 20:37:02,449 INFO L226 Difference]: Without dead ends: 212 [2023-02-18 20:37:02,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:37:02,450 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 16 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:37:02,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 503 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:37:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-18 20:37:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-02-18 20:37:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 203 states have internal predecessors, (215), 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) [2023-02-18 20:37:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 227 transitions. [2023-02-18 20:37:02,456 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 227 transitions. Word has length 106 [2023-02-18 20:37:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:37:02,456 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 227 transitions. [2023-02-18 20:37:02,457 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) [2023-02-18 20:37:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 227 transitions. [2023-02-18 20:37:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-18 20:37:02,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:37:02,458 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-18 20:37:02,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 20:37:02,671 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 [2023-02-18 20:37:02,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:37:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:37:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1349401770, now seen corresponding path program 1 times [2023-02-18 20:37:02,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:37:02,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812134282] [2023-02-18 20:37:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:37:02,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:37:02,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157781069] [2023-02-18 20:37:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:02,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:37:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:37:02,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:37:02,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 20:37:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:37:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 20:37:03,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:37:03,096 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1497 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1497))) is different from true [2023-02-18 20:37:03,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:37:03,163 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 28 [2023-02-18 20:37:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 87 refuted. 0 times theorem prover too weak. 754 trivial. 1 not checked. [2023-02-18 20:37:03,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:37:03,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:37:03,263 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 16 [2023-02-18 20:37:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-02-18 20:37:03,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:37:03,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812134282] [2023-02-18 20:37:03,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:37:03,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157781069] [2023-02-18 20:37:03,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157781069] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:37:03,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:37:03,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-18 20:37:03,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191476781] [2023-02-18 20:37:03,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:37:03,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 20:37:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:37:03,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 20:37:03,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-18 20:37:03,274 INFO L87 Difference]: Start difference. First operand 212 states and 227 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) [2023-02-18 20:37:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:37:03,872 INFO L93 Difference]: Finished difference Result 249 states and 268 transitions. [2023-02-18 20:37:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 20:37:03,873 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 121 [2023-02-18 20:37:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:37:03,874 INFO L225 Difference]: With dead ends: 249 [2023-02-18 20:37:03,875 INFO L226 Difference]: Without dead ends: 249 [2023-02-18 20:37:03,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-18 20:37:03,875 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 125 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 22 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:37:03,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1243 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 742 Invalid, 33 Unknown, 228 Unchecked, 0.5s Time] [2023-02-18 20:37:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-18 20:37:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 210. [2023-02-18 20:37:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 131 states have (on average 1.6259541984732824) internal successors, (213), 201 states have internal predecessors, (213), 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) [2023-02-18 20:37:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2023-02-18 20:37:03,882 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 121 [2023-02-18 20:37:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:37:03,882 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2023-02-18 20:37:03,882 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) [2023-02-18 20:37:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2023-02-18 20:37:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-18 20:37:03,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:37:03,884 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-18 20:37:03,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 20:37:04,084 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 [2023-02-18 20:37:04,085 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:37:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:37:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1349401771, now seen corresponding path program 1 times [2023-02-18 20:37:04,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:37:04,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759664023] [2023-02-18 20:37:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:37:04,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:37:04,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114115614] [2023-02-18 20:37:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:37:04,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:37:04,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:37:04,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 20:37:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:37:06,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-18 20:37:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:37:06,091 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 [2023-02-18 20:37:18,006 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2102 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2102)))) is different from true [2023-02-18 20:37:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:37:18,154 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 [2023-02-18 20:37:18,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:37:18,158 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 15 [2023-02-18 20:37:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2023-02-18 20:37:18,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:37:18,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:37:18,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759664023] [2023-02-18 20:37:18,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:37:19,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114115614] [2023-02-18 20:37:19,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114115614] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:37:19,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:37:19,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 20:37:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641958820] [2023-02-18 20:37:19,000 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:37:19,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 20:37:19,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:37:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 20:37:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=734, Unknown=6, NotChecked=54, Total=870 [2023-02-18 20:37:19,003 INFO L87 Difference]: Start difference. First operand 210 states and 225 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2023-02-18 20:37:21,051 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] [2023-02-18 20:37:23,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:27,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:31,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:34,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:38,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:40,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:42,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:44,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:53,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:56,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:37:58,200 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] [2023-02-18 20:37:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:37:58,272 INFO L93 Difference]: Finished difference Result 253 states and 275 transitions. [2023-02-18 20:37:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 20:37:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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 121 [2023-02-18 20:37:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:37:58,276 INFO L225 Difference]: With dead ends: 253 [2023-02-18 20:37:58,276 INFO L226 Difference]: Without dead ends: 253 [2023-02-18 20:37:58,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=171, Invalid=1546, Unknown=9, NotChecked=80, Total=1806 [2023-02-18 20:37:58,277 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 335 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 12 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2023-02-18 20:37:58,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 2179 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2182 Invalid, 12 Unknown, 205 Unchecked, 29.9s Time] [2023-02-18 20:37:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-18 20:37:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 208. [2023-02-18 20:37:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 131 states have (on average 1.6106870229007633) internal successors, (211), 199 states have internal predecessors, (211), 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) [2023-02-18 20:37:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2023-02-18 20:37:58,284 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 121 [2023-02-18 20:37:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:37:58,284 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2023-02-18 20:37:58,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2023-02-18 20:37:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2023-02-18 20:37:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 20:37:58,286 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:37:58,286 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-18 20:37:58,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 20:37:58,493 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 [2023-02-18 20:37:58,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:37:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:37:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -305022197, now seen corresponding path program 1 times [2023-02-18 20:37:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:37:58,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109124751] [2023-02-18 20:37:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:37:58,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:37:58,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652304446] [2023-02-18 20:37:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:58,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:37:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:37:58,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:37:58,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 20:37:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:37:58,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 20:37:58,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:37:58,973 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2718 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2718))) is different from true [2023-02-18 20:37:59,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:37:59,008 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 28 [2023-02-18 20:37:59,024 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2719 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2719))) is different from true [2023-02-18 20:37:59,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:37:59,061 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 28 [2023-02-18 20:37:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 174 refuted. 0 times theorem prover too weak. 574 trivial. 3 not checked. [2023-02-18 20:37:59,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:37:59,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:37:59,217 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 16 [2023-02-18 20:37:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 176 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2023-02-18 20:37:59,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:37:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109124751] [2023-02-18 20:37:59,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:37:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652304446] [2023-02-18 20:37:59,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652304446] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:37:59,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:37:59,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2023-02-18 20:37:59,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171242001] [2023-02-18 20:37:59,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:37:59,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 20:37:59,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:37:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 20:37:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2023-02-18 20:37:59,226 INFO L87 Difference]: Start difference. First operand 208 states and 223 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) [2023-02-18 20:37:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:37:59,759 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2023-02-18 20:37:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 20:37:59,760 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 123 [2023-02-18 20:37:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:37:59,761 INFO L225 Difference]: With dead ends: 244 [2023-02-18 20:37:59,762 INFO L226 Difference]: Without dead ends: 244 [2023-02-18 20:37:59,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 223 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=372, Unknown=2, NotChecked=82, Total=552 [2023-02-18 20:37:59,763 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 221 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:37:59,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1362 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 942 Invalid, 0 Unknown, 421 Unchecked, 0.5s Time] [2023-02-18 20:37:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-18 20:37:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 205. [2023-02-18 20:37:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 131 states have (on average 1.5877862595419847) internal successors, (208), 196 states have internal predecessors, (208), 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) [2023-02-18 20:37:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 220 transitions. [2023-02-18 20:37:59,768 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 220 transitions. Word has length 123 [2023-02-18 20:37:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:37:59,769 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 220 transitions. [2023-02-18 20:37:59,769 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) [2023-02-18 20:37:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 220 transitions. [2023-02-18 20:37:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 20:37:59,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:37:59,770 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-18 20:37:59,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 20:37:59,981 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 [2023-02-18 20:37:59,981 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:37:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:37:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash -305022196, now seen corresponding path program 1 times [2023-02-18 20:37:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:37:59,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892309686] [2023-02-18 20:37:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:37:59,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:00,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:00,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618073873] [2023-02-18 20:38:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:00,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:00,038 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) [2023-02-18 20:38:00,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 20:38:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:05,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-18 20:38:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:05,267 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 [2023-02-18 20:38:09,568 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3339 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_3340 Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3339)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3340)))) is different from true [2023-02-18 20:38:09,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:09,667 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 39 [2023-02-18 20:38:09,673 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 [2023-02-18 20:38:10,224 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_3341 Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3341)))) is different from true [2023-02-18 20:38:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:10,274 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 [2023-02-18 20:38:10,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:10,278 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 15 [2023-02-18 20:38:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 696 proven. 160 refuted. 0 times theorem prover too weak. 359 trivial. 336 not checked. [2023-02-18 20:38:10,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:10,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892309686] [2023-02-18 20:38:10,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618073873] [2023-02-18 20:38:10,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618073873] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:10,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:38:10,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 20:38:10,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400798476] [2023-02-18 20:38:10,995 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:10,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 20:38:10,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:10,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 20:38:10,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=495, Unknown=3, NotChecked=90, Total=650 [2023-02-18 20:38:10,996 INFO L87 Difference]: Start difference. First operand 205 states and 220 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 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) [2023-02-18 20:38:13,015 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] [2023-02-18 20:38:15,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:17,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:19,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:23,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:25,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:27,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:29,528 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] [2023-02-18 20:38:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:39,375 INFO L93 Difference]: Finished difference Result 241 states and 260 transitions. [2023-02-18 20:38:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 20:38:39,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 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 123 [2023-02-18 20:38:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:39,377 INFO L225 Difference]: With dead ends: 241 [2023-02-18 20:38:39,377 INFO L226 Difference]: Without dead ends: 241 [2023-02-18 20:38:39,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=163, Invalid=1171, Unknown=6, NotChecked=142, Total=1482 [2023-02-18 20:38:39,378 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 422 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 20 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:39,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1595 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1606 Invalid, 8 Unknown, 398 Unchecked, 21.7s Time] [2023-02-18 20:38:39,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-18 20:38:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 203. [2023-02-18 20:38:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 194 states have internal predecessors, (206), 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) [2023-02-18 20:38:39,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 218 transitions. [2023-02-18 20:38:39,384 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 218 transitions. Word has length 123 [2023-02-18 20:38:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:39,385 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 218 transitions. [2023-02-18 20:38:39,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 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) [2023-02-18 20:38:39,385 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 218 transitions. [2023-02-18 20:38:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-18 20:38:39,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:39,386 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-18 20:38:39,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:39,602 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 [2023-02-18 20:38:39,603 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:38:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:39,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1713867913, now seen corresponding path program 1 times [2023-02-18 20:38:39,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:39,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952734092] [2023-02-18 20:38:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:39,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:39,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:39,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484004825] [2023-02-18 20:38:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:39,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:39,643 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) [2023-02-18 20:38:39,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 20:38:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:40,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 20:38:40,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:40,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:40,168 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 39 [2023-02-18 20:38:40,197 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3982 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3982)))) is different from true [2023-02-18 20:38:40,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:40,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 45 treesize of output 137 [2023-02-18 20:38:41,894 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3983 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3983))) is different from true [2023-02-18 20:38:41,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:41,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 110 [2023-02-18 20:38:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 713 proven. 262 refuted. 0 times theorem prover too weak. 310 trivial. 266 not checked. [2023-02-18 20:38:43,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952734092] [2023-02-18 20:38:43,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:43,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484004825] [2023-02-18 20:38:43,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484004825] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:43,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:38:43,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 20:38:43,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850595867] [2023-02-18 20:38:43,188 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:43,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 20:38:43,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:43,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 20:38:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=262, Unknown=2, NotChecked=66, Total=380 [2023-02-18 20:38:43,190 INFO L87 Difference]: Start difference. First operand 203 states and 218 transitions. Second operand has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:38:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:44,050 INFO L93 Difference]: Finished difference Result 237 states and 256 transitions. [2023-02-18 20:38:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 20:38:44,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 130 [2023-02-18 20:38:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:44,052 INFO L225 Difference]: With dead ends: 237 [2023-02-18 20:38:44,052 INFO L226 Difference]: Without dead ends: 237 [2023-02-18 20:38:44,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=122, Invalid=534, Unknown=2, NotChecked=98, Total=756 [2023-02-18 20:38:44,053 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 297 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 31 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:44,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1309 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 904 Invalid, 39 Unknown, 441 Unchecked, 0.7s Time] [2023-02-18 20:38:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-02-18 20:38:44,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 200. [2023-02-18 20:38:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 131 states have (on average 1.549618320610687) 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) [2023-02-18 20:38:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 215 transitions. [2023-02-18 20:38:44,067 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 215 transitions. Word has length 130 [2023-02-18 20:38:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:44,068 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 215 transitions. [2023-02-18 20:38:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:38:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 215 transitions. [2023-02-18 20:38:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-18 20:38:44,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:44,070 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-18 20:38:44,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:44,282 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 [2023-02-18 20:38:44,282 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:38:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1713867914, now seen corresponding path program 1 times [2023-02-18 20:38:44,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416482983] [2023-02-18 20:38:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:44,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:44,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:44,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579793250] [2023-02-18 20:38:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:44,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:44,342 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) [2023-02-18 20:38:44,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 20:38:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-18 20:38:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:46,776 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 [2023-02-18 20:38:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:49,695 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 [2023-02-18 20:38:49,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:49,700 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 39 [2023-02-18 20:38:50,438 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4629 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4629)))) is different from true [2023-02-18 20:38:50,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:50,528 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 [2023-02-18 20:38:50,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:50,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 75 [2023-02-18 20:38:51,421 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4630 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (and (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|)) (>= v_ArrVal_4630 (mod (* |zalloc_or_die_calloc_model_~size#1| |zalloc_or_die_calloc_model_~nmemb#1|) 4294967296)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4630)))) is different from true [2023-02-18 20:38:52,959 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4630 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~size#1| |zalloc_or_die_calloc_model_~nmemb#1|) 4294967296))) (and (< 7 .cse0) (>= v_ArrVal_4630 .cse0) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4630))))) is different from true [2023-02-18 20:38:53,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:53,022 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 32 [2023-02-18 20:38:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 475 proven. 564 refuted. 0 times theorem prover too weak. 138 trivial. 374 not checked. [2023-02-18 20:38:53,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:39:01,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:39:01,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416482983] [2023-02-18 20:39:01,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:39:01,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579793250] [2023-02-18 20:39:01,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579793250] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:39:01,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:39:01,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2023-02-18 20:39:01,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873568776] [2023-02-18 20:39:01,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:39:01,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 20:39:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:39:01,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 20:39:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1593, Unknown=21, NotChecked=246, Total=1980 [2023-02-18 20:39:01,320 INFO L87 Difference]: Start difference. First operand 200 states and 215 transitions. Second operand has 43 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 20:39:03,369 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] [2023-02-18 20:39:05,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:09,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:13,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:17,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:21,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:26,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:30,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:34,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:38,506 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] [2023-02-18 20:40:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:40:19,861 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2023-02-18 20:40:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 20:40:19,862 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 130 [2023-02-18 20:40:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:40:19,863 INFO L225 Difference]: With dead ends: 233 [2023-02-18 20:40:19,863 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 20:40:19,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=273, Invalid=3009, Unknown=36, NotChecked=342, Total=3660 [2023-02-18 20:40:19,864 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 414 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 29 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 4029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:40:19,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 3351 Invalid, 4029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3385 Invalid, 10 Unknown, 605 Unchecked, 26.0s Time] [2023-02-18 20:40:19,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 20:40:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 197. [2023-02-18 20:40:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 131 states have (on average 1.5267175572519085) internal successors, (200), 188 states have internal predecessors, (200), 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) [2023-02-18 20:40:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2023-02-18 20:40:19,869 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 130 [2023-02-18 20:40:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:40:19,870 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2023-02-18 20:40:19,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 20:40:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2023-02-18 20:40:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-18 20:40:19,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:40:19,871 INFO L195 NwaCegarLoop]: trace histogram [48, 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, 1] [2023-02-18 20:40:19,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 20:40:20,092 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 [2023-02-18 20:40:20,093 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:40:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:40:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1590297785, now seen corresponding path program 1 times [2023-02-18 20:40:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:40:20,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591783108] [2023-02-18 20:40:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:40:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:40:20,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:40:20,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759142800] [2023-02-18 20:40:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:40:20,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:40:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:40:20,129 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) [2023-02-18 20:40:20,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 20:40:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:40:22,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-18 20:40:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:40:22,498 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 [2023-02-18 20:40:36,599 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5272 Int) (v_ArrVal_5271 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5271)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5272)))) is different from true [2023-02-18 20:40:36,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:40:36,713 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 [2023-02-18 20:40:36,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:40:36,715 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 39 [2023-02-18 20:40:37,032 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5273 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5273)))) is different from true [2023-02-18 20:40:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:40:37,111 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 [2023-02-18 20:40:37,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:40:37,113 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 15 [2023-02-18 20:40:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 618 proven. 253 refuted. 0 times theorem prover too weak. 290 trivial. 390 not checked. [2023-02-18 20:40:37,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:40:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:40:37,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591783108] [2023-02-18 20:40:37,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:40:37,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759142800] [2023-02-18 20:40:37,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759142800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:40:37,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:40:37,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-18 20:40:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116781879] [2023-02-18 20:40:37,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:40:37,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 20:40:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:40:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 20:40:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=8, NotChecked=110, Total=930 [2023-02-18 20:40:37,902 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand has 29 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 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) [2023-02-18 20:40:39,935 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] [2023-02-18 20:40:41,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:44,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:46,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:48,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:50,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:54,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:56,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:58,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:02,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:06,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:41:15,554 INFO L93 Difference]: Finished difference Result 231 states and 249 transitions. [2023-02-18 20:41:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 20:41:15,555 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 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 131 [2023-02-18 20:41:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:41:15,556 INFO L225 Difference]: With dead ends: 231 [2023-02-18 20:41:15,556 INFO L226 Difference]: Without dead ends: 231 [2023-02-18 20:41:15,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=189, Invalid=1612, Unknown=13, NotChecked=166, Total=1980 [2023-02-18 20:41:15,557 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 217 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 9 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2023-02-18 20:41:15,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 2287 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2149 Invalid, 11 Unknown, 380 Unchecked, 26.6s Time] [2023-02-18 20:41:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-02-18 20:41:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 196. [2023-02-18 20:41:15,561 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), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 20:41:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 211 transitions. [2023-02-18 20:41:15,562 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 211 transitions. Word has length 131 [2023-02-18 20:41:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:41:15,562 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 211 transitions. [2023-02-18 20:41:15,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 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) [2023-02-18 20:41:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 211 transitions. [2023-02-18 20:41:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-02-18 20:41:15,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:41:15,563 INFO L195 NwaCegarLoop]: trace histogram [48, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:41:15,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 20:41:15,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 20:41:15,789 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:41:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:41:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2101133601, now seen corresponding path program 1 times [2023-02-18 20:41:15,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:41:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691854934] [2023-02-18 20:41:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:41:15,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:41:15,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:41:15,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495652153] [2023-02-18 20:41:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:41:15,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:41:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:41:15,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:41:15,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 20:41:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:41:16,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-18 20:41:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:41:16,340 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5937 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5937)))) is different from true [2023-02-18 20:41:16,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:16,355 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 39 [2023-02-18 20:41:16,366 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5938 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_5938))) is different from true [2023-02-18 20:41:16,369 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5938 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_5938))) is different from true [2023-02-18 20:41:16,371 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5938 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_5938))) is different from true [2023-02-18 20:41:16,373 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5938 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_5938))) is different from true [2023-02-18 20:41:16,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:16,378 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 28 [2023-02-18 20:41:16,404 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5939 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_5939))) is different from true [2023-02-18 20:41:16,407 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5939 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_5939))) is different from true [2023-02-18 20:41:16,408 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5939 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_5939))) is different from true [2023-02-18 20:41:16,409 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5939 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_5939))) is different from true [2023-02-18 20:41:16,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:16,426 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 3 case distinctions, treesize of input 28 treesize of output 67 [2023-02-18 20:41:16,478 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5940 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5940))) is different from true [2023-02-18 20:41:16,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:16,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 149 [2023-02-18 20:41:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 448 proven. 87 refuted. 0 times theorem prover too weak. 223 trivial. 793 not checked. [2023-02-18 20:41:37,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:41:37,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:41:37,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691854934] [2023-02-18 20:41:37,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:41:37,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495652153] [2023-02-18 20:41:37,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495652153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:41:37,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:41:37,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 20:41:37,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722889966] [2023-02-18 20:41:37,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:41:37,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 20:41:37,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:41:37,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 20:41:37,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=361, Unknown=12, NotChecked=470, Total=930 [2023-02-18 20:41:37,560 INFO L87 Difference]: Start difference. First operand 196 states and 211 transitions. Second operand has 28 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 20:41:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:41:38,298 INFO L93 Difference]: Finished difference Result 226 states and 243 transitions. [2023-02-18 20:41:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 20:41:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 137 [2023-02-18 20:41:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:41:38,299 INFO L225 Difference]: With dead ends: 226 [2023-02-18 20:41:38,299 INFO L226 Difference]: Without dead ends: 226 [2023-02-18 20:41:38,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=143, Invalid=641, Unknown=12, NotChecked=610, Total=1406 [2023-02-18 20:41:38,300 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 338 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 34 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 3043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 2112 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 20:41:38,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1260 Invalid, 3043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 859 Invalid, 38 Unknown, 2112 Unchecked, 0.6s Time] [2023-02-18 20:41:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-18 20:41:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 193. [2023-02-18 20:41:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 131 states have (on average 1.4961832061068703) internal successors, (196), 184 states have internal predecessors, (196), 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) [2023-02-18 20:41:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 208 transitions. [2023-02-18 20:41:38,305 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 208 transitions. Word has length 137 [2023-02-18 20:41:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:41:38,306 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 208 transitions. [2023-02-18 20:41:38,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 20:41:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 208 transitions. [2023-02-18 20:41:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-02-18 20:41:38,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:41:38,307 INFO L195 NwaCegarLoop]: trace histogram [48, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:41:38,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-18 20:41:38,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:41:38,525 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:41:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:41:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2101133602, now seen corresponding path program 1 times [2023-02-18 20:41:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:41:38,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447136607] [2023-02-18 20:41:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:41:38,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:41:38,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:41:38,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002971767] [2023-02-18 20:41:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:41:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:41:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:41:38,559 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:41:38,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 20:41:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:41:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 129 conjunts are in the unsatisfiable core [2023-02-18 20:41:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:41:39,325 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 [2023-02-18 20:41:45,728 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6606 Int) (v_ArrVal_6605 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6605)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6606)))) is different from true [2023-02-18 20:41:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:41:45,768 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 [2023-02-18 20:41:45,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:45,777 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 39 [2023-02-18 20:41:46,202 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6607 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6607)))) is different from true [2023-02-18 20:41:46,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:41:46,260 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 [2023-02-18 20:41:46,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:46,262 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 15 [2023-02-18 20:41:47,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:47,566 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 32 [2023-02-18 20:41:48,810 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6609 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6609)) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|)) (>= v_ArrVal_6609 (mod (* |zalloc_or_die_calloc_model_~size#1| |zalloc_or_die_calloc_model_~nmemb#1|) 4294967296)))) is different from true [2023-02-18 20:41:50,162 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6609 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~size#1| |zalloc_or_die_calloc_model_~nmemb#1|) 4294967296))) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6609)) (>= v_ArrVal_6609 .cse0) (< 5 .cse0)))) is different from true [2023-02-18 20:41:50,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:50,206 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 3 case distinctions, treesize of input 40 treesize of output 71 [2023-02-18 20:42:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 233 proven. 388 refuted. 0 times theorem prover too weak. 123 trivial. 807 not checked. [2023-02-18 20:42:00,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:42:05,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:42:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447136607] [2023-02-18 20:42:05,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:42:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002971767] [2023-02-18 20:42:05,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002971767] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:42:05,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:42:05,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2023-02-18 20:42:05,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460478326] [2023-02-18 20:42:05,809 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:42:05,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 20:42:05,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:42:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 20:42:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1582, Unknown=34, NotChecked=332, Total=2070 [2023-02-18 20:42:05,810 INFO L87 Difference]: Start difference. First operand 193 states and 208 transitions. Second operand has 43 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 38 states have internal predecessors, (100), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 20:42:07,847 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] [2023-02-18 20:42:09,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:11,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:16,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:20,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:24,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:28,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:32,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:37,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:55,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:59,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:01,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:03,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:05,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:07,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:10,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:15,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:41,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:43,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:45,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:48,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:50,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:55,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:57,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:59,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:43:59,803 INFO L93 Difference]: Finished difference Result 235 states and 256 transitions. [2023-02-18 20:43:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 20:43:59,804 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 38 states have internal predecessors, (100), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 137 [2023-02-18 20:43:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:43:59,805 INFO L225 Difference]: With dead ends: 235 [2023-02-18 20:43:59,805 INFO L226 Difference]: Without dead ends: 235 [2023-02-18 20:43:59,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=328, Invalid=3420, Unknown=50, NotChecked=492, Total=4290 [2023-02-18 20:43:59,807 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 738 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 40 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 3387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 875 IncrementalHoareTripleChecker+Unchecked, 72.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:43:59,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 2575 Invalid, 3387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2447 Invalid, 25 Unknown, 875 Unchecked, 72.2s Time] [2023-02-18 20:43:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-02-18 20:43:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 191. [2023-02-18 20:43:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.4809160305343512) 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) [2023-02-18 20:43:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2023-02-18 20:43:59,811 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 137 [2023-02-18 20:43:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:43:59,812 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2023-02-18 20:43:59,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 38 states have internal predecessors, (100), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 20:43:59,812 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2023-02-18 20:43:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-18 20:43:59,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:43:59,813 INFO L195 NwaCegarLoop]: trace histogram [48, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:43:59,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 20:44:00,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 20:44:00,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-02-18 20:44:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:44:00,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1374404959, now seen corresponding path program 1 times [2023-02-18 20:44:00,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:44:00,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357905395] [2023-02-18 20:44:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:44:00,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:44:00,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:44:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320546932] [2023-02-18 20:44:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:44:00,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:44:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:44:00,069 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:44:00,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 20:44:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:44:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 20:44:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:44:00,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:44:00,671 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 39 [2023-02-18 20:44:00,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:44:00,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 110 [2023-02-18 20:44:01,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:44:01,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 35 select indices, 35 select index equivalence classes, 0 disjoint index pairs (out of 595 index pairs), introduced 35 new quantified variables, introduced 629 case distinctions, treesize of input 529 treesize of output 5796