./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0236.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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-0236.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 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:14:39,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:14:39,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:14:39,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:14:39,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:14:39,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:14:39,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:14:39,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:14:39,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:14:39,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:14:39,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:14:39,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:14:39,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:14:39,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:14:39,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:14:39,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:14:39,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:14:39,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:14:39,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:14:39,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:14:39,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:14:39,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:14:39,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:14:39,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:14:39,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:14:39,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:14:39,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:14:39,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:14:39,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:14:39,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:14:39,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:14:39,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:14:39,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:14:39,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:14:39,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:14:39,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:14:39,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:14:39,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:14:39,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:14:39,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:14:39,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:14:39,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:14:39,200 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:14:39,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:14:39,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:14:39,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:14:39,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:14:39,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:14:39,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:14:39,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:14:39,203 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:14:39,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:14:39,204 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:14:39,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:14:39,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:14:39,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:14:39,205 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:14:39,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:14:39,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:14:39,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:14:39,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:14:39,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:14:39,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:14:39,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:14:39,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:14:39,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:14:39,207 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:14:39,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:14:39,207 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:14:39,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 [2023-02-16 03:14:39,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:14:39,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:14:39,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:14:39,394 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:14:39,395 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:14:39,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0236.i [2023-02-16 03:14:40,377 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:14:40,564 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:14:40,564 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0236.i [2023-02-16 03:14:40,576 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0009bac/33d4f77c487142808ffee64cdde3a665/FLAGaeba22ca5 [2023-02-16 03:14:40,589 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0009bac/33d4f77c487142808ffee64cdde3a665 [2023-02-16 03:14:40,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:14:40,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:14:40,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:14:40,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:14:40,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:14:40,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:40,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164d3e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40, skipping insertion in model container [2023-02-16 03:14:40,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:40,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:14:40,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:14:40,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:14:40,880 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:14:40,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:14:40,961 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:14:40,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40 WrapperNode [2023-02-16 03:14:40,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:14:40,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:14:40,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:14:40,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:14:40,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:40,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,014 INFO L138 Inliner]: procedures = 188, calls = 67, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 211 [2023-02-16 03:14:41,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:14:41,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:14:41,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:14:41,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:14:41,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,049 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:14:41,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:14:41,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:14:41,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:14:41,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (1/1) ... [2023-02-16 03:14:41,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:14:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:41,080 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) [2023-02-16 03:14:41,102 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 [2023-02-16 03:14:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:14:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:14:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:14:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:14:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-16 03:14:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-16 03:14:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:14:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-16 03:14:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:14:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:14:41,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:14:41,274 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:14:41,276 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:14:41,681 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:14:41,688 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:14:41,689 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-16 03:14:41,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:14:41 BoogieIcfgContainer [2023-02-16 03:14:41,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:14:41,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:14:41,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:14:41,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:14:41,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:14:40" (1/3) ... [2023-02-16 03:14:41,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e184df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:14:41, skipping insertion in model container [2023-02-16 03:14:41,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:14:40" (2/3) ... [2023-02-16 03:14:41,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e184df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:14:41, skipping insertion in model container [2023-02-16 03:14:41,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:14:41" (3/3) ... [2023-02-16 03:14:41,698 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0236.i [2023-02-16 03:14:41,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:14:41,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-02-16 03:14:41,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:14:41,750 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;@216699a9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:14:41,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-02-16 03:14:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 116 states have (on average 1.956896551724138) internal successors, (227), 205 states have internal predecessors, (227), 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) [2023-02-16 03:14:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:14:41,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:41,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:14:41,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash 930822, now seen corresponding path program 1 times [2023-02-16 03:14:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:41,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691317063] [2023-02-16 03:14:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:41,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:14:41,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:41,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691317063] [2023-02-16 03:14:41,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691317063] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:14:41,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:14:41,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:14:41,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673897222] [2023-02-16 03:14:41,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:14:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 03:14:41,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:41,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 03:14:41,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 03:14:41,899 INFO L87 Difference]: Start difference. First operand has 213 states, 116 states have (on average 1.956896551724138) internal successors, (227), 205 states have internal predecessors, (227), 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) [2023-02-16 03:14:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:41,933 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2023-02-16 03:14:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 03:14:41,935 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 [2023-02-16 03:14:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:41,942 INFO L225 Difference]: With dead ends: 213 [2023-02-16 03:14:41,942 INFO L226 Difference]: Without dead ends: 211 [2023-02-16 03:14:41,943 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 [2023-02-16 03:14:41,945 INFO L413 NwaCegarLoop]: 228 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, 228 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 [2023-02-16 03:14:41,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:14:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-16 03:14:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-02-16 03:14:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 115 states have (on average 1.8608695652173912) internal successors, (214), 203 states have internal predecessors, (214), 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) [2023-02-16 03:14:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2023-02-16 03:14:41,974 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 4 [2023-02-16 03:14:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:41,974 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2023-02-16 03:14:41,974 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) [2023-02-16 03:14:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2023-02-16 03:14:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:14:41,975 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:41,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:14:41,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:14:41,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash 889864464, now seen corresponding path program 1 times [2023-02-16 03:14:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:41,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039439813] [2023-02-16 03:14:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:41,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:14:41,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217007769] [2023-02-16 03:14:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:41,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:41,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:41,989 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) [2023-02-16 03:14:41,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:14:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:14:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:42,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:14:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:14:42,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:14:42,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:42,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039439813] [2023-02-16 03:14:42,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:14:42,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217007769] [2023-02-16 03:14:42,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217007769] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:14:42,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:14:42,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:14:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486556311] [2023-02-16 03:14:42,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:14:42,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:14:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:14:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:14:42,119 INFO L87 Difference]: Start difference. First operand 211 states and 226 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) [2023-02-16 03:14:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:42,214 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2023-02-16 03:14:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:14:42,215 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 [2023-02-16 03:14:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:42,216 INFO L225 Difference]: With dead ends: 210 [2023-02-16 03:14:42,216 INFO L226 Difference]: Without dead ends: 210 [2023-02-16 03:14:42,216 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 [2023-02-16 03:14:42,217 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 9 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:42,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 346 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:14:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-16 03:14:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-02-16 03:14:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 115 states have (on average 1.8521739130434782) internal successors, (213), 202 states have internal predecessors, (213), 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) [2023-02-16 03:14:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2023-02-16 03:14:42,225 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 6 [2023-02-16 03:14:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:42,225 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2023-02-16 03:14:42,226 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) [2023-02-16 03:14:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2023-02-16 03:14:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 03:14:42,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:42,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:14:42,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 03:14:42,430 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 [2023-02-16 03:14:42,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1815994960, now seen corresponding path program 1 times [2023-02-16 03:14:42,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331257535] [2023-02-16 03:14:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:42,441 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:14:42,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494919867] [2023-02-16 03:14:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:42,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:42,448 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) [2023-02-16 03:14:42,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:14:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:42,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 03:14:42,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:42,550 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 [2023-02-16 03:14:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:14:42,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:14:42,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331257535] [2023-02-16 03:14:42,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:14:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494919867] [2023-02-16 03:14:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494919867] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:14:42,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:14:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:14:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166433748] [2023-02-16 03:14:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:14:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:14:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:14:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:14:42,581 INFO L87 Difference]: Start difference. First operand 210 states and 225 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) [2023-02-16 03:14:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:42,720 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2023-02-16 03:14:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:14:42,721 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 [2023-02-16 03:14:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:42,724 INFO L225 Difference]: With dead ends: 219 [2023-02-16 03:14:42,724 INFO L226 Difference]: Without dead ends: 219 [2023-02-16 03:14:42,725 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 [2023-02-16 03:14:42,725 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 16 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:42,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 571 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:14:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-16 03:14:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-02-16 03:14:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 123 states have (on average 1.8048780487804879) internal successors, (222), 210 states have internal predecessors, (222), 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) [2023-02-16 03:14:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 234 transitions. [2023-02-16 03:14:42,744 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 234 transitions. Word has length 7 [2023-02-16 03:14:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:42,744 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 234 transitions. [2023-02-16 03:14:42,744 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) [2023-02-16 03:14:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 234 transitions. [2023-02-16 03:14:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 03:14:42,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:42,746 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] [2023-02-16 03:14:42,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:14:42,950 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 [2023-02-16 03:14:42,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash 973450151, now seen corresponding path program 1 times [2023-02-16 03:14:42,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:42,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973637649] [2023-02-16 03:14:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:42,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:42,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:14:42,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769234375] [2023-02-16 03:14:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:42,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:42,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:42,976 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) [2023-02-16 03:14:42,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:14:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:43,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 03:14:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:43,153 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 [2023-02-16 03:14:43,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-16 03:14:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-16 03:14:43,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:14:43,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:43,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973637649] [2023-02-16 03:14:43,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:14:43,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769234375] [2023-02-16 03:14:43,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769234375] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:14:43,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:14:43,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:14:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053239988] [2023-02-16 03:14:43,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:14:43,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:14:43,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:14:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:14:43,384 INFO L87 Difference]: Start difference. First operand 219 states and 234 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) [2023-02-16 03:14:47,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:50,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:52,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:54,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:54,633 INFO L93 Difference]: Finished difference Result 231 states and 246 transitions. [2023-02-16 03:14:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:14:54,634 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 [2023-02-16 03:14:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:54,635 INFO L225 Difference]: With dead ends: 231 [2023-02-16 03:14:54,635 INFO L226 Difference]: Without dead ends: 221 [2023-02-16 03:14:54,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:14:54,635 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 19 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:54,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 759 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2023-02-16 03:14:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-16 03:14:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-02-16 03:14:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 125 states have (on average 1.792) internal successors, (224), 212 states have internal predecessors, (224), 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) [2023-02-16 03:14:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 236 transitions. [2023-02-16 03:14:54,640 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 236 transitions. Word has length 66 [2023-02-16 03:14:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:54,641 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 236 transitions. [2023-02-16 03:14:54,641 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) [2023-02-16 03:14:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 236 transitions. [2023-02-16 03:14:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-16 03:14:54,642 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:54,642 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] [2023-02-16 03:14:54,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 03:14:54,848 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 [2023-02-16 03:14:54,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1160552703, now seen corresponding path program 1 times [2023-02-16 03:14:54,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089950459] [2023-02-16 03:14:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:54,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:54,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:14:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180416324] [2023-02-16 03:14:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:54,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:54,887 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) [2023-02-16 03:14:54,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:14:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 03:14:55,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:55,103 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 [2023-02-16 03:14:55,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:14:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-16 03:14:55,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:14:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-16 03:14:55,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:55,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089950459] [2023-02-16 03:14:55,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:14:55,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180416324] [2023-02-16 03:14:55,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180416324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:14:55,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:14:55,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-16 03:14:55,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793717013] [2023-02-16 03:14:55,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:14:55,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:14:55,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:55,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:14:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:14:55,335 INFO L87 Difference]: Start difference. First operand 221 states and 236 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 03:14:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:55,641 INFO L93 Difference]: Finished difference Result 240 states and 256 transitions. [2023-02-16 03:14:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:14:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-02-16 03:14:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:55,642 INFO L225 Difference]: With dead ends: 240 [2023-02-16 03:14:55,642 INFO L226 Difference]: Without dead ends: 225 [2023-02-16 03:14:55,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:14:55,643 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 48 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:55,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1184 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:14:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-16 03:14:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-02-16 03:14:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 129 states have (on average 1.7674418604651163) internal successors, (228), 216 states have internal predecessors, (228), 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) [2023-02-16 03:14:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 240 transitions. [2023-02-16 03:14:55,649 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 240 transitions. Word has length 71 [2023-02-16 03:14:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:55,649 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 240 transitions. [2023-02-16 03:14:55,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 03:14:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 240 transitions. [2023-02-16 03:14:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-16 03:14:55,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:55,651 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] [2023-02-16 03:14:55,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:14:55,857 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 [2023-02-16 03:14:55,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash -809109081, now seen corresponding path program 2 times [2023-02-16 03:14:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:55,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545762109] [2023-02-16 03:14:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:55,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:14:55,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511660362] [2023-02-16 03:14:55,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:14:55,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:55,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:55,885 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) [2023-02-16 03:14:55,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:14:56,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:14:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:14:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 03:14:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:56,721 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 [2023-02-16 03:14:56,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:14:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 127 proven. 96 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-16 03:14:56,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:14:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 143 proven. 10 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-16 03:14:57,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:57,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545762109] [2023-02-16 03:14:57,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:14:57,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511660362] [2023-02-16 03:14:57,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511660362] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:14:57,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:14:57,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-16 03:14:57,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25157125] [2023-02-16 03:14:57,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:14:57,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 03:14:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 03:14:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-02-16 03:14:57,119 INFO L87 Difference]: Start difference. First operand 225 states and 240 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 03:14:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:57,971 INFO L93 Difference]: Finished difference Result 269 states and 292 transitions. [2023-02-16 03:14:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 03:14:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 86 [2023-02-16 03:14:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:57,972 INFO L225 Difference]: With dead ends: 269 [2023-02-16 03:14:57,972 INFO L226 Difference]: Without dead ends: 239 [2023-02-16 03:14:57,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 03:14:57,973 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 60 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:57,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 3107 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:14:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-02-16 03:14:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2023-02-16 03:14:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 143 states have (on average 1.6923076923076923) internal successors, (242), 230 states have internal predecessors, (242), 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) [2023-02-16 03:14:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 254 transitions. [2023-02-16 03:14:57,977 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 254 transitions. Word has length 86 [2023-02-16 03:14:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:57,978 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 254 transitions. [2023-02-16 03:14:57,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 03:14:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 254 transitions. [2023-02-16 03:14:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-16 03:14:57,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:57,979 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-02-16 03:14:57,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:14:58,190 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 [2023-02-16 03:14:58,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:58,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1800245593, now seen corresponding path program 3 times [2023-02-16 03:14:58,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:58,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040161763] [2023-02-16 03:14:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:58,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:58,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:14:58,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642355589] [2023-02-16 03:14:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:14:58,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:58,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:58,244 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) [2023-02-16 03:14:58,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:14:58,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:14:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:14:58,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 03:14:58,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:58,411 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 [2023-02-16 03:14:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2023-02-16 03:14:58,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:14:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040161763] [2023-02-16 03:14:58,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:14:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642355589] [2023-02-16 03:14:58,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642355589] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:14:58,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:14:58,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:14:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560156558] [2023-02-16 03:14:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:14:58,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:14:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:14:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:14:58,430 INFO L87 Difference]: Start difference. First operand 239 states and 254 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) [2023-02-16 03:14:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:58,527 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2023-02-16 03:14:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:14:58,527 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 116 [2023-02-16 03:14:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:58,528 INFO L225 Difference]: With dead ends: 238 [2023-02-16 03:14:58,528 INFO L226 Difference]: Without dead ends: 238 [2023-02-16 03:14:58,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:14:58,529 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 16 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:58,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 555 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:14:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-16 03:14:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-02-16 03:14:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 143 states have (on average 1.6853146853146854) internal successors, (241), 229 states have internal predecessors, (241), 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) [2023-02-16 03:14:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 253 transitions. [2023-02-16 03:14:58,533 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 253 transitions. Word has length 116 [2023-02-16 03:14:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:58,533 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 253 transitions. [2023-02-16 03:14:58,534 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) [2023-02-16 03:14:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 253 transitions. [2023-02-16 03:14:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-16 03:14:58,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:58,535 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-16 03:14:58,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:14:58,735 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 [2023-02-16 03:14:58,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:14:58,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:58,736 INFO L85 PathProgramCache]: Analyzing trace with hash 924129770, now seen corresponding path program 1 times [2023-02-16 03:14:58,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:58,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131667477] [2023-02-16 03:14:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:58,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:58,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:14:58,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572452408] [2023-02-16 03:14:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:58,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:58,795 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) [2023-02-16 03:14:58,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:14:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 03:14:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:59,178 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1758 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1758))) is different from true [2023-02-16 03:14:59,297 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:14:59,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-16 03:14:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 1029 proven. 127 refuted. 0 times theorem prover too weak. 1108 trivial. 1 not checked. [2023-02-16 03:14:59,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:14:59,512 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-16 03:14:59,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 03:14:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 1029 proven. 128 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2023-02-16 03:14:59,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131667477] [2023-02-16 03:14:59,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:14:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572452408] [2023-02-16 03:14:59,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572452408] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:14:59,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:14:59,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-16 03:14:59,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502761150] [2023-02-16 03:14:59,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:14:59,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 03:14:59,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:14:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 03:14:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-16 03:14:59,531 INFO L87 Difference]: Start difference. First operand 238 states and 253 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) [2023-02-16 03:14:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:59,990 INFO L93 Difference]: Finished difference Result 273 states and 292 transitions. [2023-02-16 03:14:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:14:59,990 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 133 [2023-02-16 03:14:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:59,992 INFO L225 Difference]: With dead ends: 273 [2023-02-16 03:14:59,992 INFO L226 Difference]: Without dead ends: 273 [2023-02-16 03:14:59,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-16 03:14:59,993 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 145 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:59,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1173 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 824 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2023-02-16 03:14:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-02-16 03:14:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 234. [2023-02-16 03:14:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 143 states have (on average 1.6573426573426573) internal successors, (237), 225 states have internal predecessors, (237), 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) [2023-02-16 03:14:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 249 transitions. [2023-02-16 03:14:59,997 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 249 transitions. Word has length 133 [2023-02-16 03:14:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:59,998 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 249 transitions. [2023-02-16 03:14:59,998 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) [2023-02-16 03:14:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 249 transitions. [2023-02-16 03:14:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-16 03:14:59,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:59,999 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-16 03:15:00,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:15:00,206 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 [2023-02-16 03:15:00,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:15:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:00,207 INFO L85 PathProgramCache]: Analyzing trace with hash 924129771, now seen corresponding path program 1 times [2023-02-16 03:15:00,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:00,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816960101] [2023-02-16 03:15:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:00,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:00,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625206431] [2023-02-16 03:15:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:00,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:00,254 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) [2023-02-16 03:15:00,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:15:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:15:03,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-16 03:15:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:03,407 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 [2023-02-16 03:15:03,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:15:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 645 proven. 55 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2023-02-16 03:15:03,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:15:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 695 refuted. 0 times theorem prover too weak. 1570 trivial. 0 not checked. [2023-02-16 03:15:04,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:04,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816960101] [2023-02-16 03:15:04,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:04,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625206431] [2023-02-16 03:15:04,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625206431] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:15:04,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:15:04,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-02-16 03:15:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541026256] [2023-02-16 03:15:04,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:15:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 03:15:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 03:15:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-02-16 03:15:04,169 INFO L87 Difference]: Start difference. First operand 234 states and 249 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-02-16 03:15:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:05,147 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2023-02-16 03:15:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 03:15:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 133 [2023-02-16 03:15:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:05,148 INFO L225 Difference]: With dead ends: 252 [2023-02-16 03:15:05,148 INFO L226 Difference]: Without dead ends: 237 [2023-02-16 03:15:05,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=2184, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 03:15:05,151 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 63 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 3125 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:05,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 3125 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:15:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-02-16 03:15:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-02-16 03:15:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 146 states have (on average 1.643835616438356) internal successors, (240), 228 states have internal predecessors, (240), 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) [2023-02-16 03:15:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 252 transitions. [2023-02-16 03:15:05,155 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 252 transitions. Word has length 133 [2023-02-16 03:15:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:05,156 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 252 transitions. [2023-02-16 03:15:05,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-02-16 03:15:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 252 transitions. [2023-02-16 03:15:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-16 03:15:05,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:05,158 INFO L195 NwaCegarLoop]: trace histogram [71, 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] [2023-02-16 03:15:05,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:15:05,373 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 [2023-02-16 03:15:05,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:15:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1239601845, now seen corresponding path program 2 times [2023-02-16 03:15:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785172745] [2023-02-16 03:15:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:05,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:05,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82235884] [2023-02-16 03:15:05,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:15:05,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:05,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:05,434 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) [2023-02-16 03:15:05,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:15:11,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:15:11,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:15:11,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 115 conjunts are in the unsatisfiable core [2023-02-16 03:15:11,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:11,204 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 [2023-02-16 03:15:17,189 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3386 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_3386)))) is different from true [2023-02-16 03:15:19,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:15:19,176 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 [2023-02-16 03:15:19,271 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:15:19,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-16 03:15:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 1108 proven. 1059 refuted. 0 times theorem prover too weak. 872 trivial. 7 not checked. [2023-02-16 03:15:19,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:15:22,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:22,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785172745] [2023-02-16 03:15:22,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:22,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82235884] [2023-02-16 03:15:22,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82235884] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:15:22,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:15:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2023-02-16 03:15:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451686669] [2023-02-16 03:15:22,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 03:15:22,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 03:15:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 03:15:22,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2212, Unknown=9, NotChecked=94, Total=2450 [2023-02-16 03:15:22,338 INFO L87 Difference]: Start difference. First operand 237 states and 252 transitions. Second operand has 48 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 45 states have internal predecessors, (73), 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) [2023-02-16 03:15:24,383 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] [2023-02-16 03:15:26,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:28,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:30,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:32,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:34,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:39,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:41,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:43,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:45,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:47,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:51,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:15:55,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:16:16,699 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:16:28,878 WARN L233 SmtUtils]: Spent 10.59s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:16:31,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:16:33,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:16:39,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:16:41,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:16:43,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:16:46,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:16:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:16:46,136 INFO L93 Difference]: Finished difference Result 451 states and 480 transitions. [2023-02-16 03:16:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 03:16:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 45 states have internal predecessors, (73), 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 144 [2023-02-16 03:16:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:16:46,139 INFO L225 Difference]: With dead ends: 451 [2023-02-16 03:16:46,139 INFO L226 Difference]: Without dead ends: 451 [2023-02-16 03:16:46,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=282, Invalid=4130, Unknown=14, NotChecked=130, Total=4556 [2023-02-16 03:16:46,140 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 268 mSDsluCounter, 3490 mSDsCounter, 0 mSdLazyCounter, 4137 mSolverCounterSat, 9 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 3626 SdHoareTripleChecker+Invalid, 4541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4137 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 45.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:16:46,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 3626 Invalid, 4541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4137 Invalid, 19 Unknown, 376 Unchecked, 45.3s Time] [2023-02-16 03:16:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-02-16 03:16:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 251. [2023-02-16 03:16:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 159 states have (on average 1.6226415094339623) internal successors, (258), 241 states have internal predecessors, (258), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-16 03:16:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 271 transitions. [2023-02-16 03:16:46,145 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 271 transitions. Word has length 144 [2023-02-16 03:16:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:16:46,146 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 271 transitions. [2023-02-16 03:16:46,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 45 states have internal predecessors, (73), 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) [2023-02-16 03:16:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 271 transitions. [2023-02-16 03:16:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-16 03:16:46,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:16:46,147 INFO L195 NwaCegarLoop]: trace histogram [72, 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] [2023-02-16 03:16:46,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-16 03:16:46,353 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 [2023-02-16 03:16:46,353 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:16:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:16:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1252799445, now seen corresponding path program 3 times [2023-02-16 03:16:46,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:16:46,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512221481] [2023-02-16 03:16:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:16:46,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:16:46,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:16:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469128478] [2023-02-16 03:16:46,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:16:46,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:16:46,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:16:46,395 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) [2023-02-16 03:16:46,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:16:47,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 03:16:47,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:16:47,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 03:16:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:16:47,251 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 [2023-02-16 03:16:47,415 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (exists ((v_ArrVal_4279 Int)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_4279))) (= 0 (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|)))) is different from true [2023-02-16 03:16:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:16:47,476 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 12 treesize of output 14 [2023-02-16 03:16:47,484 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:16:47,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-16 03:16:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1413 proven. 0 refuted. 0 times theorem prover too weak. 1534 trivial. 176 not checked. [2023-02-16 03:16:47,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:16:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:16:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512221481] [2023-02-16 03:16:47,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:16:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469128478] [2023-02-16 03:16:47,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469128478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:16:47,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:16:47,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-16 03:16:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422233820] [2023-02-16 03:16:47,584 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 03:16:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 03:16:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:16:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 03:16:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=153, Unknown=1, NotChecked=24, Total=210 [2023-02-16 03:16:47,584 INFO L87 Difference]: Start difference. First operand 251 states and 271 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 03:16:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:16:48,445 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2023-02-16 03:16:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:16:48,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 145 [2023-02-16 03:16:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:16:48,447 INFO L225 Difference]: With dead ends: 292 [2023-02-16 03:16:48,447 INFO L226 Difference]: Without dead ends: 292 [2023-02-16 03:16:48,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=273, Unknown=1, NotChecked=34, Total=380 [2023-02-16 03:16:48,448 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 354 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:16:48,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 968 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1253 Invalid, 0 Unknown, 214 Unchecked, 0.6s Time] [2023-02-16 03:16:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-02-16 03:16:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 233. [2023-02-16 03:16:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 146 states have (on average 1.6164383561643836) internal successors, (236), 224 states have internal predecessors, (236), 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) [2023-02-16 03:16:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 248 transitions. [2023-02-16 03:16:48,455 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 248 transitions. Word has length 145 [2023-02-16 03:16:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:16:48,455 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 248 transitions. [2023-02-16 03:16:48,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 03:16:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 248 transitions. [2023-02-16 03:16:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-16 03:16:48,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:16:48,456 INFO L195 NwaCegarLoop]: trace histogram [71, 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] [2023-02-16 03:16:48,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:16:48,662 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 [2023-02-16 03:16:48,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:16:48,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:16:48,663 INFO L85 PathProgramCache]: Analyzing trace with hash 849730582, now seen corresponding path program 1 times [2023-02-16 03:16:48,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:16:48,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154155980] [2023-02-16 03:16:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:16:48,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:16:48,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:16:48,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899303046] [2023-02-16 03:16:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:16:48,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:16:48,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:16:48,712 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) [2023-02-16 03:16:48,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:16:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:16:49,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 03:16:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:16:49,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-02-16 03:16:49,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 9 [2023-02-16 03:16:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 815 proven. 0 refuted. 0 times theorem prover too weak. 2231 trivial. 0 not checked. [2023-02-16 03:16:49,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:16:49,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:16:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154155980] [2023-02-16 03:16:49,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:16:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899303046] [2023-02-16 03:16:49,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899303046] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:16:49,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:16:49,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 03:16:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266532206] [2023-02-16 03:16:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:16:49,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 03:16:49,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:16:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 03:16:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:16:49,233 INFO L87 Difference]: Start difference. First operand 233 states and 248 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 03:16:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:16:49,557 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2023-02-16 03:16:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:16:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 147 [2023-02-16 03:16:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:16:49,558 INFO L225 Difference]: With dead ends: 233 [2023-02-16 03:16:49,558 INFO L226 Difference]: Without dead ends: 233 [2023-02-16 03:16:49,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:16:49,559 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 35 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:16:49,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1237 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:16:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-16 03:16:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2023-02-16 03:16:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 146 states have (on average 1.6095890410958904) internal successors, (235), 223 states have internal predecessors, (235), 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) [2023-02-16 03:16:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 247 transitions. [2023-02-16 03:16:49,562 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 247 transitions. Word has length 147 [2023-02-16 03:16:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:16:49,563 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 247 transitions. [2023-02-16 03:16:49,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 03:16:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 247 transitions. [2023-02-16 03:16:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-16 03:16:49,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:16:49,563 INFO L195 NwaCegarLoop]: trace histogram [71, 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] [2023-02-16 03:16:49,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:16:49,769 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 [2023-02-16 03:16:49,769 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:16:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:16:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash 849730583, now seen corresponding path program 1 times [2023-02-16 03:16:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:16:49,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080544657] [2023-02-16 03:16:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:16:49,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:16:49,824 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:16:49,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648198798] [2023-02-16 03:16:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:16:49,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:16:49,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:16:49,838 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) [2023-02-16 03:16:49,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:16:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:16:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-16 03:16:54,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:16:54,306 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 [2023-02-16 03:17:04,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-02-16 03:17:04,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-02-16 03:17:05,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 13 [2023-02-16 03:17:05,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 [2023-02-16 03:17:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 727 proven. 635 refuted. 0 times theorem prover too weak. 1684 trivial. 0 not checked. [2023-02-16 03:17:05,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:17:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 842 proven. 36 refuted. 0 times theorem prover too weak. 2168 trivial. 0 not checked. [2023-02-16 03:17:09,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:17:09,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080544657] [2023-02-16 03:17:09,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:17:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648198798] [2023-02-16 03:17:09,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648198798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:17:09,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:17:09,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 43 [2023-02-16 03:17:09,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072752212] [2023-02-16 03:17:09,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:17:09,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-16 03:17:09,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:17:09,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-16 03:17:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1674, Unknown=4, NotChecked=0, Total=1892 [2023-02-16 03:17:09,607 INFO L87 Difference]: Start difference. First operand 232 states and 247 transitions. Second operand has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-16 03:17:11,877 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] [2023-02-16 03:17:13,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:17:18,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:17:20,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:17:22,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:17:24,404 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] [2023-02-16 03:17:41,890 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:17:52,884 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:17:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:17:56,203 INFO L93 Difference]: Finished difference Result 231 states and 246 transitions. [2023-02-16 03:17:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 03:17:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 147 [2023-02-16 03:17:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:17:56,205 INFO L225 Difference]: With dead ends: 231 [2023-02-16 03:17:56,205 INFO L226 Difference]: Without dead ends: 231 [2023-02-16 03:17:56,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=383, Invalid=2582, Unknown=5, NotChecked=0, Total=2970 [2023-02-16 03:17:56,206 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 41 mSDsluCounter, 4495 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 4700 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:17:56,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 4700 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1853 Invalid, 6 Unknown, 0 Unchecked, 14.5s Time] [2023-02-16 03:17:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-02-16 03:17:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2023-02-16 03:17:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 146 states have (on average 1.6027397260273972) internal successors, (234), 222 states have internal predecessors, (234), 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) [2023-02-16 03:17:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 246 transitions. [2023-02-16 03:17:56,210 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 246 transitions. Word has length 147 [2023-02-16 03:17:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:17:56,210 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 246 transitions. [2023-02-16 03:17:56,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-16 03:17:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 246 transitions. [2023-02-16 03:17:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-16 03:17:56,211 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:17:56,211 INFO L195 NwaCegarLoop]: trace histogram [71, 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] [2023-02-16 03:17:56,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 03:17:56,425 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 [2023-02-16 03:17:56,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:17:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:17:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash -213460325, now seen corresponding path program 1 times [2023-02-16 03:17:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:17:56,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196643373] [2023-02-16 03:17:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:17:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:17:56,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:17:56,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303079874] [2023-02-16 03:17:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:17:56,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:17:56,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:17:56,468 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) [2023-02-16 03:17:56,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:17:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:17:56,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 03:17:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:17:57,091 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_6981 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_6981)))) is different from true [2023-02-16 03:17:57,156 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:17:57,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:17:57,170 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6982 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6982))) is different from true [2023-02-16 03:17:57,268 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:17:57,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-16 03:17:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 1553 proven. 162 refuted. 0 times theorem prover too weak. 991 trivial. 340 not checked. [2023-02-16 03:17:57,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:17:57,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:17:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196643373] [2023-02-16 03:17:57,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:17:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303079874] [2023-02-16 03:17:57,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303079874] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:17:57,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:17:57,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-16 03:17:57,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759355437] [2023-02-16 03:17:57,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 03:17:57,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 03:17:57,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:17:57,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 03:17:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=179, Unknown=2, NotChecked=54, Total=272 [2023-02-16 03:17:57,474 INFO L87 Difference]: Start difference. First operand 231 states and 246 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 03:17:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:17:58,218 INFO L93 Difference]: Finished difference Result 266 states and 285 transitions. [2023-02-16 03:17:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:17:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2023-02-16 03:17:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:17:58,219 INFO L225 Difference]: With dead ends: 266 [2023-02-16 03:17:58,219 INFO L226 Difference]: Without dead ends: 266 [2023-02-16 03:17:58,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=411, Unknown=2, NotChecked=86, Total=600 [2023-02-16 03:17:58,220 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 247 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 24 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:17:58,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1286 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 922 Invalid, 38 Unknown, 444 Unchecked, 0.6s Time] [2023-02-16 03:17:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-16 03:17:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 227. [2023-02-16 03:17:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.5753424657534247) internal successors, (230), 218 states have internal predecessors, (230), 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) [2023-02-16 03:17:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 242 transitions. [2023-02-16 03:17:58,223 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 242 transitions. Word has length 150 [2023-02-16 03:17:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:17:58,224 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 242 transitions. [2023-02-16 03:17:58,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 03:17:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 242 transitions. [2023-02-16 03:17:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-16 03:17:58,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:17:58,225 INFO L195 NwaCegarLoop]: trace histogram [71, 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] [2023-02-16 03:17:58,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 03:17:58,433 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 [2023-02-16 03:17:58,434 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-16 03:17:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:17:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash -213460324, now seen corresponding path program 1 times [2023-02-16 03:17:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:17:58,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377882656] [2023-02-16 03:17:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:17:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:17:58,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:17:58,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590559306] [2023-02-16 03:17:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:17:58,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:17:58,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:17:58,479 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) [2023-02-16 03:17:58,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:17:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:17:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 163 conjunts are in the unsatisfiable core [2023-02-16 03:17:59,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:17:59,114 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 [2023-02-16 03:18:13,086 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:18:13,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-16 03:18:13,194 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:18:13,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:18:45,781 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-16 03:18:45,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:18:45,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-02-16 03:18:51,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:18:52,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 17 [2023-02-16 03:19:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 1157 proven. 1405 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-16 03:19:13,771 INFO L328 TraceCheckSpWp]: Computing backward predicates...