./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3dbbec33 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-0235-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:23:12,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:23:12,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:23:12,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:23:12,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:23:12,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:23:12,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:23:12,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:23:12,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:23:12,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:23:12,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:23:12,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:23:12,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:23:12,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:23:12,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:23:12,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:23:12,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:23:12,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:23:12,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:23:13,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:23:13,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:23:13,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:23:13,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:23:13,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:23:13,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:23:13,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:23:13,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:23:13,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:23:13,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:23:13,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:23:13,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:23:13,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:23:13,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:23:13,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:23:13,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:23:13,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:23:13,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:23:13,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:23:13,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:23:13,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:23:13,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:23:13,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 13:23:13,050 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:23:13,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:23:13,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:23:13,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:23:13,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:23:13,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:23:13,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:23:13,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:23:13,051 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:23:13,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 13:23:13,052 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:23:13,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:23:13,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:23:13,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:23:13,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:23:13,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:23:13,057 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:23:13,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:23:13,057 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:23:13,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2023-02-14 13:23:13,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:23:13,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:23:13,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:23:13,358 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:23:13,358 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:23:13,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-3.i [2023-02-14 13:23:14,409 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:23:14,683 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:23:14,686 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-3.i [2023-02-14 13:23:14,698 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07321c855/d2a76c1853874e7da15fe843774333bf/FLAG21196b606 [2023-02-14 13:23:14,710 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07321c855/d2a76c1853874e7da15fe843774333bf [2023-02-14 13:23:14,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:23:14,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:23:14,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:23:14,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:23:14,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:23:14,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:23:14" (1/1) ... [2023-02-14 13:23:14,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e59802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:14, skipping insertion in model container [2023-02-14 13:23:14,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:23:14" (1/1) ... [2023-02-14 13:23:14,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:23:14,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:23:15,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:23:15,069 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:23:15,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:23:15,148 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:23:15,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15 WrapperNode [2023-02-14 13:23:15,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:23:15,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:23:15,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:23:15,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:23:15,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,193 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2023-02-14 13:23:15,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:23:15,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:23:15,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:23:15,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:23:15,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,286 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:23:15,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:23:15,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:23:15,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:23:15,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (1/1) ... [2023-02-14 13:23:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:23:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:15,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 13:23:15,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 13:23:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 13:23:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:23:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 13:23:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 13:23:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-14 13:23:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-14 13:23:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 13:23:15,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 13:23:15,364 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-02-14 13:23:15,364 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-02-14 13:23:15,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:23:15,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:23:15,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:23:15,469 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:23:15,470 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:23:15,925 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:23:15,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:23:15,937 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-14 13:23:15,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:23:15 BoogieIcfgContainer [2023-02-14 13:23:15,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:23:15,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:23:15,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:23:15,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:23:15,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:23:14" (1/3) ... [2023-02-14 13:23:15,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de6cb05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:23:15, skipping insertion in model container [2023-02-14 13:23:15,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:23:15" (2/3) ... [2023-02-14 13:23:15,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de6cb05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:23:15, skipping insertion in model container [2023-02-14 13:23:15,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:23:15" (3/3) ... [2023-02-14 13:23:15,949 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2023-02-14 13:23:15,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:23:15,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-02-14 13:23:16,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:23:16,019 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;@4664ce63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:23:16,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-02-14 13:23:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-14 13:23:16,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:16,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-14 13:23:16,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-14 13:23:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-02-14 13:23:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:16,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978174889] [2023-02-14 13:23:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:16,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:23:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:23:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:16,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978174889] [2023-02-14 13:23:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978174889] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:23:16,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:23:16,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:23:16,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021076010] [2023-02-14 13:23:16,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:23:16,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 13:23:16,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 13:23:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 13:23:16,204 INFO L87 Difference]: Start difference. First operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:23:16,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:16,263 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2023-02-14 13:23:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 13:23:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-14 13:23:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:16,276 INFO L225 Difference]: With dead ends: 243 [2023-02-14 13:23:16,276 INFO L226 Difference]: Without dead ends: 241 [2023-02-14 13:23:16,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 13:23:16,280 INFO L413 NwaCegarLoop]: 274 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, 274 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:23:16,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:23:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-14 13:23:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-02-14 13:23:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 225 states have internal predecessors, (246), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2023-02-14 13:23:16,335 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 4 [2023-02-14 13:23:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:16,335 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2023-02-14 13:23:16,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:23:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2023-02-14 13:23:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 13:23:16,336 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:16,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 13:23:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:23:16,337 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)] === [2023-02-14 13:23:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash 889942911, now seen corresponding path program 1 times [2023-02-14 13:23:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:16,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118925043] [2023-02-14 13:23:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:16,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:16,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68927256] [2023-02-14 13:23:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:16,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:16,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:16,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:16,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:23:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:23:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 13:23:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:16,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:23:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:23:16,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:23:16,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:16,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118925043] [2023-02-14 13:23:16,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68927256] [2023-02-14 13:23:16,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68927256] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:23:16,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:23:16,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:23:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103433789] [2023-02-14 13:23:16,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:23:16,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:23:16,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:23:16,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:23:16,575 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:23:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:16,749 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2023-02-14 13:23:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:23:16,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-14 13:23:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:16,751 INFO L225 Difference]: With dead ends: 240 [2023-02-14 13:23:16,751 INFO L226 Difference]: Without dead ends: 240 [2023-02-14 13:23:16,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:23:16,753 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 438 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 [2023-02-14 13:23:16,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 438 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:23:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-14 13:23:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2023-02-14 13:23:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 137 states have (on average 1.7883211678832116) internal successors, (245), 224 states have internal predecessors, (245), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2023-02-14 13:23:16,768 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 6 [2023-02-14 13:23:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:16,768 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2023-02-14 13:23:16,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:23:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2023-02-14 13:23:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 13:23:16,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:16,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:23:16,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 13:23:16,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:16,976 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)] === [2023-02-14 13:23:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1818426896, now seen corresponding path program 1 times [2023-02-14 13:23:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693382711] [2023-02-14 13:23:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:16,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:16,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542305667] [2023-02-14 13:23:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:16,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:16,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:16,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:23:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:23:17,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:23:17,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:17,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 13:23:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:23:17,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:23:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693382711] [2023-02-14 13:23:17,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:17,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542305667] [2023-02-14 13:23:17,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542305667] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:23:17,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:23:17,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 13:23:17,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603927337] [2023-02-14 13:23:17,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:23:17,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:23:17,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:23:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:23:17,123 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:23:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:17,265 INFO L93 Difference]: Finished difference Result 249 states and 280 transitions. [2023-02-14 13:23:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:23:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-14 13:23:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:17,267 INFO L225 Difference]: With dead ends: 249 [2023-02-14 13:23:17,267 INFO L226 Difference]: Without dead ends: 249 [2023-02-14 13:23:17,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:23:17,268 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 16 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 709 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 [2023-02-14 13:23:17,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 709 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:23:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-14 13:23:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2023-02-14 13:23:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 145 states have (on average 1.7517241379310344) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2023-02-14 13:23:17,283 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 7 [2023-02-14 13:23:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:17,283 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2023-02-14 13:23:17,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:23:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2023-02-14 13:23:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-14 13:23:17,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:17,285 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:23:17,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 13:23:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-14 13:23:17,491 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)] === [2023-02-14 13:23:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1283052409, now seen corresponding path program 1 times [2023-02-14 13:23:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995423003] [2023-02-14 13:23:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:17,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:17,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845616629] [2023-02-14 13:23:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:17,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:17,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:17,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:17,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:23:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:23:17,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 13:23:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:17,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:23:17,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-14 13:23:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-14 13:23:18,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:23:18,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995423003] [2023-02-14 13:23:18,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845616629] [2023-02-14 13:23:18,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845616629] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:23:18,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:23:18,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:23:18,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937882395] [2023-02-14 13:23:18,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:23:18,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:23:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:23:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:23:18,082 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 13:23:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:22,381 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2023-02-14 13:23:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:23:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2023-02-14 13:23:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:22,383 INFO L225 Difference]: With dead ends: 261 [2023-02-14 13:23:22,383 INFO L226 Difference]: Without dead ends: 251 [2023-02-14 13:23:22,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:23:22,384 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 19 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:23:22,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 943 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-14 13:23:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-02-14 13:23:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2023-02-14 13:23:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 234 states have internal predecessors, (256), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 282 transitions. [2023-02-14 13:23:22,395 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 282 transitions. Word has length 66 [2023-02-14 13:23:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:22,395 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 282 transitions. [2023-02-14 13:23:22,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 13:23:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 282 transitions. [2023-02-14 13:23:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 13:23:22,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:22,397 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:23:22,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:23:22,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:22,609 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)] === [2023-02-14 13:23:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash 370417648, now seen corresponding path program 1 times [2023-02-14 13:23:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178451990] [2023-02-14 13:23:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:22,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:22,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:22,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615826369] [2023-02-14 13:23:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:22,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:22,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:22,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:22,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:23:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:23:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 13:23:22,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:22,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:23:22,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:23:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 13:23:22,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:23:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-14 13:23:23,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:23,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178451990] [2023-02-14 13:23:23,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:23,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615826369] [2023-02-14 13:23:23,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615826369] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:23:23,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:23:23,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-14 13:23:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122024411] [2023-02-14 13:23:23,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:23:23,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:23:23,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:23:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:23:23,213 INFO L87 Difference]: Start difference. First operand 251 states and 282 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 13:23:23,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:23,552 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2023-02-14 13:23:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:23:23,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-02-14 13:23:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:23,554 INFO L225 Difference]: With dead ends: 277 [2023-02-14 13:23:23,554 INFO L226 Difference]: Without dead ends: 257 [2023-02-14 13:23:23,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-02-14 13:23:23,555 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 28 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:23:23,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1889 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:23:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-14 13:23:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-02-14 13:23:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 153 states have (on average 1.7124183006535947) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2023-02-14 13:23:23,564 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 71 [2023-02-14 13:23:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:23,564 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2023-02-14 13:23:23,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 13:23:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2023-02-14 13:23:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-14 13:23:23,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:23,566 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] [2023-02-14 13:23:23,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 13:23:23,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:23,774 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)] === [2023-02-14 13:23:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:23,775 INFO L85 PathProgramCache]: Analyzing trace with hash 955905991, now seen corresponding path program 2 times [2023-02-14 13:23:23,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:23,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352751450] [2023-02-14 13:23:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:23,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:23,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493995791] [2023-02-14 13:23:23,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:23:23,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:23,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:23,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:23,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:23:24,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:23:24,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:23:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 13:23:24,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:24,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:23:24,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:23:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 220 proven. 36 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-14 13:23:24,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:23:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 47 proven. 106 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-14 13:23:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352751450] [2023-02-14 13:23:24,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:24,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493995791] [2023-02-14 13:23:24,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493995791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:23:24,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:23:24,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-14 13:23:24,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948130344] [2023-02-14 13:23:24,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:23:24,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 13:23:24,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 13:23:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-02-14 13:23:24,903 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-14 13:23:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:25,430 INFO L93 Difference]: Finished difference Result 285 states and 320 transitions. [2023-02-14 13:23:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:23:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2023-02-14 13:23:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:25,432 INFO L225 Difference]: With dead ends: 285 [2023-02-14 13:23:25,432 INFO L226 Difference]: Without dead ends: 265 [2023-02-14 13:23:25,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2023-02-14 13:23:25,433 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 33 mSDsluCounter, 2665 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:23:25,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2924 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 13:23:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-02-14 13:23:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-02-14 13:23:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 161 states have (on average 1.6770186335403727) internal successors, (270), 248 states have internal predecessors, (270), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 296 transitions. [2023-02-14 13:23:25,440 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 296 transitions. Word has length 86 [2023-02-14 13:23:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:25,441 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 296 transitions. [2023-02-14 13:23:25,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-14 13:23:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 296 transitions. [2023-02-14 13:23:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-14 13:23:25,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:25,442 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:23:25,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 13:23:25,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:25,656 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)] === [2023-02-14 13:23:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1008033017, now seen corresponding path program 3 times [2023-02-14 13:23:25,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928063970] [2023-02-14 13:23:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:25,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:25,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:25,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397568891] [2023-02-14 13:23:25,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:23:25,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:25,704 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:25,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:23:25,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 13:23:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:23:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 13:23:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:25,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:23:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-02-14 13:23:25,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:23:25,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:25,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928063970] [2023-02-14 13:23:25,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:25,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397568891] [2023-02-14 13:23:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397568891] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:23:25,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:23:25,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 13:23:25,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511552319] [2023-02-14 13:23:25,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:23:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:23:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:23:25,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:23:25,941 INFO L87 Difference]: Start difference. First operand 265 states and 296 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 13:23:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:26,047 INFO L93 Difference]: Finished difference Result 264 states and 295 transitions. [2023-02-14 13:23:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:23:26,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 106 [2023-02-14 13:23:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:26,049 INFO L225 Difference]: With dead ends: 264 [2023-02-14 13:23:26,049 INFO L226 Difference]: Without dead ends: 264 [2023-02-14 13:23:26,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:23:26,050 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 16 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:23:26,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 728 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:23:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-14 13:23:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2023-02-14 13:23:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.670807453416149) internal successors, (269), 247 states have internal predecessors, (269), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 295 transitions. [2023-02-14 13:23:26,057 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 295 transitions. Word has length 106 [2023-02-14 13:23:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:26,057 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 295 transitions. [2023-02-14 13:23:26,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 13:23:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 295 transitions. [2023-02-14 13:23:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-14 13:23:26,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:26,059 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:23:26,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 13:23:26,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:26,267 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)] === [2023-02-14 13:23:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:26,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1842595626, now seen corresponding path program 1 times [2023-02-14 13:23:26,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:26,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266843963] [2023-02-14 13:23:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:26,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:26,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:26,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912420486] [2023-02-14 13:23:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:26,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:26,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:26,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:23:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:23:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 13:23:26,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:26,712 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1495 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1495))) is different from true [2023-02-14 13:23:26,808 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:23:26,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-14 13:23:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 87 refuted. 0 times theorem prover too weak. 754 trivial. 1 not checked. [2023-02-14 13:23:26,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:23:27,053 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:23:27,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 13:23:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-02-14 13:23:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266843963] [2023-02-14 13:23:27,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:27,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912420486] [2023-02-14 13:23:27,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912420486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:23:27,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:23:27,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-14 13:23:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748596166] [2023-02-14 13:23:27,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:23:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 13:23:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 13:23:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-14 13:23:27,081 INFO L87 Difference]: Start difference. First operand 264 states and 295 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 13:23:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:23:27,882 INFO L93 Difference]: Finished difference Result 422 states and 490 transitions. [2023-02-14 13:23:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:23:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2023-02-14 13:23:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:23:27,886 INFO L225 Difference]: With dead ends: 422 [2023-02-14 13:23:27,886 INFO L226 Difference]: Without dead ends: 422 [2023-02-14 13:23:27,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-14 13:23:27,887 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 359 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:23:27,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1814 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1233 Invalid, 0 Unknown, 449 Unchecked, 0.6s Time] [2023-02-14 13:23:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-02-14 13:23:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 262. [2023-02-14 13:23:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.6583850931677018) internal successors, (267), 245 states have internal predecessors, (267), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:23:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 293 transitions. [2023-02-14 13:23:27,897 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 293 transitions. Word has length 121 [2023-02-14 13:23:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:23:27,897 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 293 transitions. [2023-02-14 13:23:27,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 13:23:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 293 transitions. [2023-02-14 13:23:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-14 13:23:27,899 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:23:27,899 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:23:27,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 13:23:28,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:28,108 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)] === [2023-02-14 13:23:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:23:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1842595627, now seen corresponding path program 1 times [2023-02-14 13:23:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:23:28,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864712768] [2023-02-14 13:23:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:28,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:23:28,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:23:28,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545427133] [2023-02-14 13:23:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:23:28,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:23:28,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:23:28,161 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:23:28,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 13:23:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:23:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-14 13:23:35,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:23:35,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:23:45,207 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2100 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2100)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 13:23:45,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:23:45,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:23:45,364 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:23:45,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 13:23:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2023-02-14 13:23:45,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:23:50,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:23:50,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864712768] [2023-02-14 13:23:50,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:23:50,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545427133] [2023-02-14 13:23:50,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545427133] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:23:50,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:23:50,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-14 13:23:50,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444399018] [2023-02-14 13:23:50,325 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:23:50,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 13:23:50,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:23:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 13:23:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=4, NotChecked=54, Total=870 [2023-02-14 13:23:50,326 INFO L87 Difference]: Start difference. First operand 262 states and 293 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 13:23:52,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:23:54,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:23:58,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:02,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:06,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:10,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:14,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:19,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:21,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:25,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:24:53,047 WARN L233 SmtUtils]: Spent 8.80s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:25:05,241 WARN L233 SmtUtils]: Spent 11.15s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:25:11,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:13,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:15,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:25:16,478 INFO L93 Difference]: Finished difference Result 418 states and 488 transitions. [2023-02-14 13:25:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 13:25:16,479 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 121 [2023-02-14 13:25:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:25:16,481 INFO L225 Difference]: With dead ends: 418 [2023-02-14 13:25:16,481 INFO L226 Difference]: Without dead ends: 418 [2023-02-14 13:25:16,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 67.7s TimeCoverageRelationStatistics Valid=187, Invalid=1606, Unknown=17, NotChecked=82, Total=1892 [2023-02-14 13:25:16,484 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 383 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 5426 mSolverCounterSat, 44 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 5905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5426 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:25:16,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1547 Invalid, 5905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5426 Invalid, 13 Unknown, 422 Unchecked, 32.2s Time] [2023-02-14 13:25:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-02-14 13:25:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 260. [2023-02-14 13:25:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 243 states have internal predecessors, (265), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:25:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2023-02-14 13:25:16,494 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 121 [2023-02-14 13:25:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:25:16,494 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2023-02-14 13:25:16,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 13:25:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2023-02-14 13:25:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-14 13:25:16,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:25:16,496 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:25:16,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 13:25:16,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-14 13:25:16,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-14 13:25:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:25:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1207870859, now seen corresponding path program 1 times [2023-02-14 13:25:16,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:25:16,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224373468] [2023-02-14 13:25:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:25:16,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:25:16,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:25:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444540777] [2023-02-14 13:25:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:25:16,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:25:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:25:16,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:25:16,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:25:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:25:17,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-14 13:25:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:25:17,209 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2716 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2716))) is different from true [2023-02-14 13:25:17,298 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:25:17,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-14 13:25:17,320 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2717 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2717))) is different from true [2023-02-14 13:25:17,412 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:25:17,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-14 13:25:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 174 refuted. 0 times theorem prover too weak. 574 trivial. 3 not checked. [2023-02-14 13:25:17,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:25:17,844 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:25:17,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 13:25:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 176 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2023-02-14 13:25:17,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:25:17,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224373468] [2023-02-14 13:25:17,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:25:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444540777] [2023-02-14 13:25:17,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444540777] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:25:17,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:25:17,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2023-02-14 13:25:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254989968] [2023-02-14 13:25:17,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:25:17,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 13:25:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:25:17,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 13:25:17,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2023-02-14 13:25:17,862 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 13:25:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:25:18,770 INFO L93 Difference]: Finished difference Result 417 states and 485 transitions. [2023-02-14 13:25:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:25:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 123 [2023-02-14 13:25:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:25:18,772 INFO L225 Difference]: With dead ends: 417 [2023-02-14 13:25:18,772 INFO L226 Difference]: Without dead ends: 417 [2023-02-14 13:25:18,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 224 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=372, Unknown=2, NotChecked=82, Total=552 [2023-02-14 13:25:18,773 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 579 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 916 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:25:18,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1867 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1336 Invalid, 0 Unknown, 916 Unchecked, 0.7s Time] [2023-02-14 13:25:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-02-14 13:25:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 257. [2023-02-14 13:25:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.6273291925465838) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:25:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2023-02-14 13:25:18,782 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 123 [2023-02-14 13:25:18,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:25:18,782 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2023-02-14 13:25:18,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 13:25:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2023-02-14 13:25:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-14 13:25:18,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:25:18,784 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:25:18,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 13:25:18,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 13:25:18,993 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-14 13:25:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:25:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1207870860, now seen corresponding path program 1 times [2023-02-14 13:25:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:25:18,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777634496] [2023-02-14 13:25:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:25:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:25:19,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:25:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945467569] [2023-02-14 13:25:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:25:19,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:25:19,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:25:19,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:25:19,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 13:25:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:25:20,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-14 13:25:20,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:25:20,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:25:28,493 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3337 Int) (v_ArrVal_3338 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3337) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3338)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 13:25:28,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:25:28,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:25:28,725 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:25:28,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 13:25:28,820 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3339 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3339) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 13:25:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:25:28,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:25:28,942 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:25:28,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 13:25:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 722 proven. 125 refuted. 0 times theorem prover too weak. 386 trivial. 318 not checked. [2023-02-14 13:25:29,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:25:31,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:25:31,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777634496] [2023-02-14 13:25:31,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:25:31,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945467569] [2023-02-14 13:25:31,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945467569] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:25:31,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:25:31,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-14 13:25:31,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943125687] [2023-02-14 13:25:31,957 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:25:31,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 13:25:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:25:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 13:25:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=411, Unknown=3, NotChecked=82, Total=552 [2023-02-14 13:25:31,958 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 13:25:33,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:35,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:38,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:40,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:44,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:25:46,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:26:03,159 WARN L233 SmtUtils]: Spent 10.59s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:26:18,833 WARN L233 SmtUtils]: Spent 15.07s on a formula simplification. DAG size of input: 62 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:26:40,908 WARN L233 SmtUtils]: Spent 21.48s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:26:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:26:46,616 INFO L93 Difference]: Finished difference Result 406 states and 473 transitions. [2023-02-14 13:26:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 13:26:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2023-02-14 13:26:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:26:46,619 INFO L225 Difference]: With dead ends: 406 [2023-02-14 13:26:46,619 INFO L226 Difference]: Without dead ends: 406 [2023-02-14 13:26:46,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=149, Invalid=976, Unknown=5, NotChecked=130, Total=1260 [2023-02-14 13:26:46,620 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 484 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 61 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 4183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:26:46,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 861 Invalid, 4183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3506 Invalid, 6 Unknown, 610 Unchecked, 18.0s Time] [2023-02-14 13:26:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-02-14 13:26:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 255. [2023-02-14 13:26:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 161 states have (on average 1.6149068322981366) internal successors, (260), 238 states have internal predecessors, (260), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:26:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2023-02-14 13:26:46,629 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 286 transitions. Word has length 123 [2023-02-14 13:26:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:26:46,629 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 286 transitions. [2023-02-14 13:26:46,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 13:26:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 286 transitions. [2023-02-14 13:26:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-14 13:26:46,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:26:46,631 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:26:46,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 13:26:46,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 13:26:46,849 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-14 13:26:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:26:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1175835145, now seen corresponding path program 1 times [2023-02-14 13:26:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:26:46,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830023356] [2023-02-14 13:26:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:26:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:26:46,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:26:46,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720518403] [2023-02-14 13:26:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:26:46,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:26:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:26:46,903 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:26:46,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 13:26:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:26:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 13:26:47,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:26:47,408 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3979 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3979)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-14 13:26:47,472 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:26:47,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 13:26:47,482 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_3980))) is different from true [2023-02-14 13:26:47,499 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_3980))) is different from true [2023-02-14 13:26:47,502 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_3980))) is different from true [2023-02-14 13:26:47,505 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_3980))) is different from true [2023-02-14 13:26:47,522 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:26:47,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-14 13:26:47,556 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3981 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3981))) is different from true [2023-02-14 13:26:47,653 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:26:47,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 13:26:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 713 proven. 87 refuted. 0 times theorem prover too weak. 310 trivial. 441 not checked. [2023-02-14 13:26:47,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:26:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:26:48,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830023356] [2023-02-14 13:26:48,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:26:48,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720518403] [2023-02-14 13:26:48,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720518403] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:26:48,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:26:48,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-14 13:26:48,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244823199] [2023-02-14 13:26:48,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:26:48,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:26:48,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:26:48,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:26:48,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=484, Unknown=6, NotChecked=294, Total=870 [2023-02-14 13:26:48,240 INFO L87 Difference]: Start difference. First operand 255 states and 286 transitions. Second operand has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 13:26:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:26:49,327 INFO L93 Difference]: Finished difference Result 448 states and 526 transitions. [2023-02-14 13:26:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:26:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 130 [2023-02-14 13:26:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:26:49,330 INFO L225 Difference]: With dead ends: 448 [2023-02-14 13:26:49,330 INFO L226 Difference]: Without dead ends: 448 [2023-02-14 13:26:49,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=779, Unknown=6, NotChecked=378, Total=1332 [2023-02-14 13:26:49,331 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 576 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 69 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 3412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 1895 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:26:49,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1974 Invalid, 3412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1409 Invalid, 39 Unknown, 1895 Unchecked, 0.9s Time] [2023-02-14 13:26:49,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-02-14 13:26:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 323. [2023-02-14 13:26:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 224 states have (on average 1.6517857142857142) internal successors, (370), 299 states have internal predecessors, (370), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2023-02-14 13:26:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 427 transitions. [2023-02-14 13:26:49,343 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 427 transitions. Word has length 130 [2023-02-14 13:26:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:26:49,343 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 427 transitions. [2023-02-14 13:26:49,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 13:26:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 427 transitions. [2023-02-14 13:26:49,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-14 13:26:49,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:26:49,345 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:26:49,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 13:26:49,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 13:26:49,554 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-14 13:26:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:26:49,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1175835146, now seen corresponding path program 1 times [2023-02-14 13:26:49,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:26:49,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470723090] [2023-02-14 13:26:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:26:49,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:26:49,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:26:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634521509] [2023-02-14 13:26:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:26:49,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:26:49,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:26:49,598 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:26:49,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 13:26:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:26:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 142 conjunts are in the unsatisfiable core [2023-02-14 13:26:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:26:54,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:27:13,381 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:27:13,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 13:27:13,554 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:27:13,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 13:27:16,361 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-14 13:27:16,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:27:16,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:27:18,266 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4631 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4631) |c_#length|) (<= (mod .cse0 4294967296) v_ArrVal_4631) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0)))) is different from true [2023-02-14 13:27:20,524 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4631 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|) 4294967296))) (and (< 7 .cse0) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4631) |c_#length|) (<= .cse0 v_ArrVal_4631)))) is different from true [2023-02-14 13:27:21,135 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:27:21,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 13:27:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 475 proven. 875 refuted. 0 times theorem prover too weak. 138 trivial. 63 not checked. [2023-02-14 13:27:23,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:27:26,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:27:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470723090] [2023-02-14 13:27:26,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:27:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634521509] [2023-02-14 13:27:26,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634521509] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:27:26,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:27:26,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2023-02-14 13:27:26,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113208455] [2023-02-14 13:27:26,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:27:26,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 13:27:26,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:27:26,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 13:27:26,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2481, Unknown=23, NotChecked=202, Total=2862 [2023-02-14 13:27:26,810 INFO L87 Difference]: Start difference. First operand 323 states and 427 transitions. Second operand has 52 states, 49 states have (on average 1.816326530612245) internal successors, (89), 47 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:27:28,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:27:30,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:27:35,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:27:39,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:27:43,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 13:27:47,454 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]