./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 a31fd051 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-?-a31fd05 [2023-02-15 12:56:02,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:56:02,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:56:02,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:56:02,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:56:02,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:56:02,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:56:02,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:56:02,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:56:02,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:56:02,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:56:02,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:56:02,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:56:02,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:56:02,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:56:02,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:56:02,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:56:02,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:56:02,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:56:02,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:56:02,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:56:02,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:56:02,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:56:02,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:56:02,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:56:02,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:56:02,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:56:02,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:56:02,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:56:02,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:56:02,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:56:02,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:56:02,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:56:02,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:56:02,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:56:02,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:56:02,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:56:02,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:56:02,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:56:02,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:56:02,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:56:02,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 12:56:02,177 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:56:02,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:56:02,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:56:02,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:56:02,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:56:02,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:56:02,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:56:02,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:56:02,180 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:56:02,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:56:02,181 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:56:02,181 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 12:56:02,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:56:02,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:56:02,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:56:02,182 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 12:56:02,182 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 12:56:02,182 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 12:56:02,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:56:02,183 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 12:56:02,183 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:56:02,183 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:56:02,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:56:02,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:56:02,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:56:02,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:56:02,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:56:02,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:56:02,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:56:02,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:56:02,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:56:02,192 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:56:02,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:56:02,192 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:56:02,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 [2023-02-15 12:56:02,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:56:02,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:56:02,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:56:02,460 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:56:02,460 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:56:02,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0236.i [2023-02-15 12:56:03,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:56:03,854 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:56:03,855 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0236.i [2023-02-15 12:56:03,873 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6eeb212/1517a9e32849466ebb8e101d97f27021/FLAGfc5426ce1 [2023-02-15 12:56:03,885 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6eeb212/1517a9e32849466ebb8e101d97f27021 [2023-02-15 12:56:03,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:56:03,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:56:03,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:56:03,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:56:03,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:56:03,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:56:03" (1/1) ... [2023-02-15 12:56:03,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c107c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:03, skipping insertion in model container [2023-02-15 12:56:03,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:56:03" (1/1) ... [2023-02-15 12:56:03,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:56:03,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:56:04,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:56:04,272 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:56:04,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:56:04,390 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:56:04,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04 WrapperNode [2023-02-15 12:56:04,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:56:04,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:56:04,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:56:04,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:56:04,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,456 INFO L138 Inliner]: procedures = 188, calls = 67, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 211 [2023-02-15 12:56:04,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:56:04,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:56:04,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:56:04,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:56:04,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:56:04,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:56:04,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:56:04,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:56:04,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (1/1) ... [2023-02-15 12:56:04,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:56:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:04,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 12:56:04,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 12:56:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 12:56:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:56:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 12:56:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 12:56:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-15 12:56:04,566 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-15 12:56:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 12:56:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 12:56:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:56:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:56:04,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:56:04,677 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:56:04,679 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:56:05,165 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:56:05,180 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:56:05,180 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-15 12:56:05,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:56:05 BoogieIcfgContainer [2023-02-15 12:56:05,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:56:05,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:56:05,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:56:05,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:56:05,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:56:03" (1/3) ... [2023-02-15 12:56:05,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2ac8c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:56:05, skipping insertion in model container [2023-02-15 12:56:05,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:04" (2/3) ... [2023-02-15 12:56:05,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2ac8c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:56:05, skipping insertion in model container [2023-02-15 12:56:05,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:56:05" (3/3) ... [2023-02-15 12:56:05,194 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0236.i [2023-02-15 12:56:05,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:56:05,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-02-15 12:56:05,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:56:05,269 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;@6a29796b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:56:05,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-02-15 12:56:05,274 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) [2023-02-15 12:56:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 12:56:05,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:05,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 12:56:05,280 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)] === [2023-02-15 12:56:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 930822, now seen corresponding path program 1 times [2023-02-15 12:56:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:05,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702208651] [2023-02-15 12:56:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:05,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:56:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702208651] [2023-02-15 12:56:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702208651] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:05,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:05,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:56:05,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364285220] [2023-02-15 12:56:05,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:05,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 12:56:05,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:05,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 12:56:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:56:05,474 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) [2023-02-15 12:56:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:05,504 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2023-02-15 12:56:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 12:56:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 12:56:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:05,517 INFO L225 Difference]: With dead ends: 213 [2023-02-15 12:56:05,517 INFO L226 Difference]: Without dead ends: 211 [2023-02-15 12:56:05,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:56:05,523 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 [2023-02-15 12:56:05,525 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] [2023-02-15 12:56:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-15 12:56:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-02-15 12:56:05,572 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) [2023-02-15 12:56:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2023-02-15 12:56:05,577 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 4 [2023-02-15 12:56:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:05,577 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2023-02-15 12:56:05,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:56:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2023-02-15 12:56:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 12:56:05,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:05,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 12:56:05,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:56:05,578 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)] === [2023-02-15 12:56:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash 889864464, now seen corresponding path program 1 times [2023-02-15 12:56:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756856687] [2023-02-15 12:56:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:05,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:05,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:05,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108414438] [2023-02-15 12:56:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:05,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:05,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:05,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:05,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:56:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 12:56:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:05,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:56:05,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:05,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:05,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756856687] [2023-02-15 12:56:05,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:05,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108414438] [2023-02-15 12:56:05,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108414438] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:05,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:05,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:56:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141602217] [2023-02-15 12:56:05,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:56:05,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:56:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:56:05,761 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) [2023-02-15 12:56:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:05,947 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2023-02-15 12:56:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:56:05,950 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 [2023-02-15 12:56:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:05,954 INFO L225 Difference]: With dead ends: 210 [2023-02-15 12:56:05,954 INFO L226 Difference]: Without dead ends: 210 [2023-02-15 12:56:05,955 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 [2023-02-15 12:56:05,956 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 [2023-02-15 12:56:05,957 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] [2023-02-15 12:56:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-15 12:56:05,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-02-15 12:56:05,979 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) [2023-02-15 12:56:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2023-02-15 12:56:05,985 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 6 [2023-02-15 12:56:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:05,986 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2023-02-15 12:56:05,986 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) [2023-02-15 12:56:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2023-02-15 12:56:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 12:56:05,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:05,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:05,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:06,192 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 [2023-02-15 12:56:06,193 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)] === [2023-02-15 12:56:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1815994960, now seen corresponding path program 1 times [2023-02-15 12:56:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:06,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620389039] [2023-02-15 12:56:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:06,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:06,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746107170] [2023-02-15 12:56:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:06,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:06,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:06,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:06,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:56:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:56:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:06,351 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 [2023-02-15 12:56:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:56:06,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:06,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:06,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620389039] [2023-02-15 12:56:06,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:06,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746107170] [2023-02-15 12:56:06,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746107170] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:06,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:06,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:56:06,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773415994] [2023-02-15 12:56:06,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:06,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:56:06,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:06,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:56:06,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:56:06,378 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) [2023-02-15 12:56:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:06,544 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2023-02-15 12:56:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:56:06,545 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 [2023-02-15 12:56:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:06,546 INFO L225 Difference]: With dead ends: 219 [2023-02-15 12:56:06,547 INFO L226 Difference]: Without dead ends: 219 [2023-02-15 12:56:06,547 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 [2023-02-15 12:56:06,550 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 [2023-02-15 12:56:06,551 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] [2023-02-15 12:56:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-15 12:56:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-02-15 12:56:06,562 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) [2023-02-15 12:56:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 234 transitions. [2023-02-15 12:56:06,563 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 234 transitions. Word has length 7 [2023-02-15 12:56:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:06,564 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 234 transitions. [2023-02-15 12:56:06,564 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) [2023-02-15 12:56:06,564 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 234 transitions. [2023-02-15 12:56:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:56:06,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:06,566 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] [2023-02-15 12:56:06,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:06,772 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 [2023-02-15 12:56:06,773 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)] === [2023-02-15 12:56:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash 973450151, now seen corresponding path program 1 times [2023-02-15 12:56:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:06,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028905702] [2023-02-15 12:56:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:06,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:06,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211780439] [2023-02-15 12:56:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:06,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:06,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:56:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 12:56:07,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:07,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:07,248 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 [2023-02-15 12:56:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 12:56:09,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:09,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:09,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028905702] [2023-02-15 12:56:09,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:09,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211780439] [2023-02-15 12:56:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211780439] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:09,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:09,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:56:09,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844560064] [2023-02-15 12:56:09,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:09,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:56:09,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:56:09,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:56:09,494 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) [2023-02-15 12:56:14,500 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] [2023-02-15 12:56:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:15,637 INFO L93 Difference]: Finished difference Result 231 states and 246 transitions. [2023-02-15 12:56:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:56:15,638 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 [2023-02-15 12:56:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:15,640 INFO L225 Difference]: With dead ends: 231 [2023-02-15 12:56:15,640 INFO L226 Difference]: Without dead ends: 221 [2023-02-15 12:56:15,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2023-02-15 12:56:15,641 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 19 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:15,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 759 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-15 12:56:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-15 12:56:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-02-15 12:56:15,647 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) [2023-02-15 12:56:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 236 transitions. [2023-02-15 12:56:15,649 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 236 transitions. Word has length 66 [2023-02-15 12:56:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:15,649 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 236 transitions. [2023-02-15 12:56:15,649 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) [2023-02-15 12:56:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 236 transitions. [2023-02-15 12:56:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 12:56:15,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:15,651 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] [2023-02-15 12:56:15,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:15,858 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 [2023-02-15 12:56:15,858 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)] === [2023-02-15 12:56:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1160552703, now seen corresponding path program 1 times [2023-02-15 12:56:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:15,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506032179] [2023-02-15 12:56:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:15,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:15,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632948601] [2023-02-15 12:56:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:15,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:15,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:15,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:56:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:16,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 12:56:16,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:16,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:16,147 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 [2023-02-15 12:56:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 92 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 12:56:16,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-15 12:56:16,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506032179] [2023-02-15 12:56:16,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632948601] [2023-02-15 12:56:16,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632948601] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:16,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:16,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-15 12:56:16,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503875638] [2023-02-15 12:56:16,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:16,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:56:16,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:56:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:56:16,416 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, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:56:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:16,722 INFO L93 Difference]: Finished difference Result 247 states and 264 transitions. [2023-02-15 12:56:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:56:16,723 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, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2023-02-15 12:56:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:16,724 INFO L225 Difference]: With dead ends: 247 [2023-02-15 12:56:16,724 INFO L226 Difference]: Without dead ends: 227 [2023-02-15 12:56:16,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:56:16,725 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 38 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:16,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1387 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:56:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-15 12:56:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-02-15 12:56:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 131 states have (on average 1.7557251908396947) 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) [2023-02-15 12:56:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 242 transitions. [2023-02-15 12:56:16,740 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 242 transitions. Word has length 71 [2023-02-15 12:56:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:16,740 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 242 transitions. [2023-02-15 12:56:16,740 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, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:56:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 242 transitions. [2023-02-15 12:56:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-15 12:56:16,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:16,745 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] [2023-02-15 12:56:16,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:16,953 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 [2023-02-15 12:56:16,953 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)] === [2023-02-15 12:56:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash -809109081, now seen corresponding path program 2 times [2023-02-15 12:56:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846082301] [2023-02-15 12:56:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:16,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:16,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:16,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027253157] [2023-02-15 12:56:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:56:16,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:16,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:16,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:17,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:56:17,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:56:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:56:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 12:56:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:17,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:17,642 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 [2023-02-15 12:56:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-02-15 12:56:17,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 15 proven. 138 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-15 12:56:18,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846082301] [2023-02-15 12:56:18,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027253157] [2023-02-15 12:56:18,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027253157] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:18,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:18,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-15 12:56:18,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034553294] [2023-02-15 12:56:18,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:18,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:56:18,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:18,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:56:18,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:56:18,061 INFO L87 Difference]: Start difference. First operand 227 states and 242 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-15 12:56:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:18,999 INFO L93 Difference]: Finished difference Result 249 states and 268 transitions. [2023-02-15 12:56:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:56:19,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2023-02-15 12:56:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:19,001 INFO L225 Difference]: With dead ends: 249 [2023-02-15 12:56:19,001 INFO L226 Difference]: Without dead ends: 234 [2023-02-15 12:56:19,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 12:56:19,002 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 73 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:19,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1598 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:56:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-15 12:56:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2023-02-15 12:56:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 138 states have (on average 1.7173913043478262) 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) [2023-02-15 12:56:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 249 transitions. [2023-02-15 12:56:19,009 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 249 transitions. Word has length 86 [2023-02-15 12:56:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:19,011 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 249 transitions. [2023-02-15 12:56:19,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-15 12:56:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 249 transitions. [2023-02-15 12:56:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-15 12:56:19,012 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:19,013 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] [2023-02-15 12:56:19,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:19,224 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 [2023-02-15 12:56:19,224 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)] === [2023-02-15 12:56:19,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:19,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1800245593, now seen corresponding path program 3 times [2023-02-15 12:56:19,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:19,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628954453] [2023-02-15 12:56:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:19,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:19,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:19,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684069288] [2023-02-15 12:56:19,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:56:19,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:19,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:19,291 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) [2023-02-15 12:56:19,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:56:19,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 12:56:19,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:56:19,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:56:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:19,508 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 [2023-02-15 12:56:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2023-02-15 12:56:19,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:19,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628954453] [2023-02-15 12:56:19,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:19,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684069288] [2023-02-15 12:56:19,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684069288] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:19,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:19,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:56:19,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413551127] [2023-02-15 12:56:19,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:19,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:56:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:56:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:56:19,529 INFO L87 Difference]: Start difference. First operand 234 states and 249 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) [2023-02-15 12:56:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:19,669 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2023-02-15 12:56:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:56:19,670 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 [2023-02-15 12:56:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:19,671 INFO L225 Difference]: With dead ends: 233 [2023-02-15 12:56:19,672 INFO L226 Difference]: Without dead ends: 233 [2023-02-15 12:56:19,672 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 [2023-02-15 12:56:19,672 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 [2023-02-15 12:56:19,672 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] [2023-02-15 12:56:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-15 12:56:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2023-02-15 12:56:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 138 states have (on average 1.710144927536232) 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) [2023-02-15 12:56:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 248 transitions. [2023-02-15 12:56:19,680 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 248 transitions. Word has length 116 [2023-02-15 12:56:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:19,682 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 248 transitions. [2023-02-15 12:56:19,682 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) [2023-02-15 12:56:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 248 transitions. [2023-02-15 12:56:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-15 12:56:19,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:19,692 INFO L195 NwaCegarLoop]: trace histogram [55, 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] [2023-02-15 12:56:19,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:19,898 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 [2023-02-15 12:56:19,899 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)] === [2023-02-15 12:56:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1906868364, now seen corresponding path program 1 times [2023-02-15 12:56:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:19,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722655087] [2023-02-15 12:56:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:19,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:19,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53760764] [2023-02-15 12:56:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:19,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:19,963 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) [2023-02-15 12:56:19,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:56:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:56:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:20,414 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1699 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1699))) is different from true [2023-02-15 12:56:20,540 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:56:20,541 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 [2023-02-15 12:56:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 809 proven. 72 refuted. 0 times theorem prover too weak. 1068 trivial. 1 not checked. [2023-02-15 12:56:20,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:20,778 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 12:56:20,779 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 [2023-02-15 12:56:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 809 proven. 73 refuted. 0 times theorem prover too weak. 1068 trivial. 0 not checked. [2023-02-15 12:56:20,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:20,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722655087] [2023-02-15 12:56:20,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53760764] [2023-02-15 12:56:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53760764] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:20,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:20,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-15 12:56:20,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793095994] [2023-02-15 12:56:20,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:20,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 12:56:20,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 12:56:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-15 12:56:20,801 INFO L87 Difference]: Start difference. First operand 233 states and 248 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) [2023-02-15 12:56:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:21,420 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2023-02-15 12:56:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:56:21,420 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 128 [2023-02-15 12:56:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:21,422 INFO L225 Difference]: With dead ends: 268 [2023-02-15 12:56:21,422 INFO L226 Difference]: Without dead ends: 268 [2023-02-15 12:56:21,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 240 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-15 12:56:21,423 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 145 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:21,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1297 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 918 Invalid, 0 Unknown, 248 Unchecked, 0.5s Time] [2023-02-15 12:56:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-15 12:56:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 229. [2023-02-15 12:56:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 138 states have (on average 1.681159420289855) internal successors, (232), 220 states have internal predecessors, (232), 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) [2023-02-15 12:56:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 244 transitions. [2023-02-15 12:56:21,429 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 244 transitions. Word has length 128 [2023-02-15 12:56:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:21,429 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 244 transitions. [2023-02-15 12:56:21,429 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) [2023-02-15 12:56:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 244 transitions. [2023-02-15 12:56:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-15 12:56:21,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:21,431 INFO L195 NwaCegarLoop]: trace histogram [55, 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] [2023-02-15 12:56:21,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:21,631 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 [2023-02-15 12:56:21,632 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)] === [2023-02-15 12:56:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1906868363, now seen corresponding path program 1 times [2023-02-15 12:56:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412587854] [2023-02-15 12:56:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:21,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:21,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658390959] [2023-02-15 12:56:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:21,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:21,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:21,709 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) [2023-02-15 12:56:21,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:56:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-15 12:56:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:24,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:32,899 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2388 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (let ((.cse0 (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (and (<= (+ 4294967296 (* (div (+ |c_zalloc_or_die_#in~size#1| (- 6)) 4294967296) 4294967296)) .cse0) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2388) |c_#length|) (<= |c_zalloc_or_die_#in~size#1| .cse0) (<= v_ArrVal_2388 5) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0)))) is different from true [2023-02-15 12:56:33,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:56:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:56:33,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-02-15 12:56:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 734 proven. 409 refuted. 0 times theorem prover too weak. 803 trivial. 4 not checked. [2023-02-15 12:56:33,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 365 proven. 15 refuted. 0 times theorem prover too weak. 1570 trivial. 0 not checked. [2023-02-15 12:56:36,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:36,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412587854] [2023-02-15 12:56:36,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:36,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658390959] [2023-02-15 12:56:36,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658390959] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:36,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:36,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 40 [2023-02-15 12:56:36,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41030100] [2023-02-15 12:56:36,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:36,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 12:56:36,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 12:56:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1333, Unknown=2, NotChecked=74, Total=1560 [2023-02-15 12:56:36,475 INFO L87 Difference]: Start difference. First operand 229 states and 244 transitions. Second operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 37 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 12:56:38,537 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] [2023-02-15 12:56:40,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:42,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:46,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:51,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:57,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:01,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:05,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:10,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:40,619 WARN L233 SmtUtils]: Spent 6.61s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:57:50,194 WARN L233 SmtUtils]: Spent 8.72s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:58:00,872 WARN L233 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:58:03,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:07,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:11,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:17,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:21,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:26,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:59,741 WARN L233 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:59:01,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:46,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:48,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:28,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]