./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0234-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0234-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:36:52,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:36:52,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:36:52,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:36:52,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:36:52,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:36:52,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:36:52,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:36:52,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:36:52,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:36:52,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:36:52,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:36:52,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:36:52,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:36:52,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:36:52,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:36:52,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:36:52,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:36:52,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:36:52,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:36:52,597 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:36:52,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:36:52,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:36:52,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:36:52,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:36:52,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:36:52,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:36:52,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:36:52,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:36:52,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:36:52,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:36:52,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:36:52,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:36:52,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:36:52,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:36:52,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:36:52,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:36:52,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:36:52,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:36:52,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:36:52,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:36:52,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:36:52,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:36:52,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:36:52,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:36:52,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:36:52,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:36:52,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:36:52,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:36:52,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:36:52,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:36:52,650 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:36:52,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:36:52,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:36:52,651 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:36:52,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:36:52,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:36:52,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:36:52,652 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:36:52,652 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:36:52,652 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:36:52,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:36:52,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:36:52,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:36:52,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:36:52,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:36:52,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:36:52,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:36:52,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:36:52,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:36:52,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:36:52,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:36:52,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:36:52,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2022-07-12 18:36:52,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:36:52,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:36:52,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:36:52,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:36:52,918 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:36:52,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0234-2.i [2022-07-12 18:36:52,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ca337c0/5bde26078c464efe9b92a2e4ce69c328/FLAGaae7b817d [2022-07-12 18:36:53,399 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:36:53,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0234-2.i [2022-07-12 18:36:53,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ca337c0/5bde26078c464efe9b92a2e4ce69c328/FLAGaae7b817d [2022-07-12 18:36:53,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ca337c0/5bde26078c464efe9b92a2e4ce69c328 [2022-07-12 18:36:53,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:36:53,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:36:53,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:36:53,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:36:53,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:36:53,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:36:53" (1/1) ... [2022-07-12 18:36:53,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787e4f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:53, skipping insertion in model container [2022-07-12 18:36:53,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:36:53" (1/1) ... [2022-07-12 18:36:53,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:36:53,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:36:54,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:36:54,135 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:36:54,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:36:54,235 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:36:54,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54 WrapperNode [2022-07-12 18:36:54,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:36:54,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:36:54,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:36:54,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:36:54,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,293 INFO L137 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2022-07-12 18:36:54,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:36:54,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:36:54,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:36:54,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:36:54,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:36:54,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:36:54,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:36:54,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:36:54,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (1/1) ... [2022-07-12 18:36:54,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:36:54,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:36:54,377 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) [2022-07-12 18:36:54,378 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 [2022-07-12 18:36:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:36:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:36:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:36:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:36:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-12 18:36:54,416 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-12 18:36:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:36:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:36:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 18:36:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:36:54,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:36:54,520 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:36:54,522 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:36:54,926 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:36:54,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:36:54,942 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-12 18:36:54,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:36:54 BoogieIcfgContainer [2022-07-12 18:36:54,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:36:54,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:36:54,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:36:54,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:36:54,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:36:53" (1/3) ... [2022-07-12 18:36:54,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1657d2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:36:54, skipping insertion in model container [2022-07-12 18:36:54,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:54" (2/3) ... [2022-07-12 18:36:54,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1657d2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:36:54, skipping insertion in model container [2022-07-12 18:36:54,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:36:54" (3/3) ... [2022-07-12 18:36:54,953 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2022-07-12 18:36:54,964 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:36:54,964 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2022-07-12 18:36:55,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:36:55,007 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fdf8c9f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1f000ec9 [2022-07-12 18:36:55,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2022-07-12 18:36:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:36:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 18:36:55,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:36:55,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 18:36:55,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:36:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:36:55,023 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-12 18:36:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:36:55,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739427999] [2022-07-12 18:36:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:36:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:36:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:36:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:36:55,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:36:55,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739427999] [2022-07-12 18:36:55,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739427999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:36:55,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:36:55,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:36:55,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933197169] [2022-07-12 18:36:55,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:36:55,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 18:36:55,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:36:55,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 18:36:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 18:36:55,185 INFO L87 Difference]: Start difference. First operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:36:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:36:55,219 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2022-07-12 18:36:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 18:36:55,223 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 [2022-07-12 18:36:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:36:55,233 INFO L225 Difference]: With dead ends: 182 [2022-07-12 18:36:55,233 INFO L226 Difference]: Without dead ends: 180 [2022-07-12 18:36:55,235 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 [2022-07-12 18:36:55,239 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:36:55,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:36:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-12 18:36:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-07-12 18:36:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 103 states have (on average 1.7766990291262137) internal successors, (183), 172 states have internal predecessors, (183), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:36:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2022-07-12 18:36:55,276 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 4 [2022-07-12 18:36:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:36:55,276 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2022-07-12 18:36:55,277 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) [2022-07-12 18:36:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2022-07-12 18:36:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:36:55,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:36:55,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:36:55,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:36:55,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:36:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:36:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 889833681, now seen corresponding path program 1 times [2022-07-12 18:36:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:36:55,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368307365] [2022-07-12 18:36:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:36:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:36:55,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:36:55,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032054950] [2022-07-12 18:36:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:36:55,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:36:55,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:36:55,298 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) [2022-07-12 18:36:55,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:36:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:36:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:36:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:36:55,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:36:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:36:55,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:36:55,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:36:55,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368307365] [2022-07-12 18:36:55,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:36:55,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032054950] [2022-07-12 18:36:55,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032054950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:36:55,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:36:55,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:36:55,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693732979] [2022-07-12 18:36:55,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:36:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:36:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:36:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:36:55,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:36:55,463 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:36:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:36:55,615 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2022-07-12 18:36:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:36:55,615 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 [2022-07-12 18:36:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:36:55,617 INFO L225 Difference]: With dead ends: 179 [2022-07-12 18:36:55,617 INFO L226 Difference]: Without dead ends: 179 [2022-07-12 18:36:55,619 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 [2022-07-12 18:36:55,620 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:36:55,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 302 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:36:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-12 18:36:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-07-12 18:36:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 103 states have (on average 1.766990291262136) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:36:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2022-07-12 18:36:55,641 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 6 [2022-07-12 18:36:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:36:55,643 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2022-07-12 18:36:55,647 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) [2022-07-12 18:36:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2022-07-12 18:36:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:36:55,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:36:55,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:36:55,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:36:55,848 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 [2022-07-12 18:36:55,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:36:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:36:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040656, now seen corresponding path program 1 times [2022-07-12 18:36:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:36:55,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618897426] [2022-07-12 18:36:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:36:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:36:55,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:36:55,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656905945] [2022-07-12 18:36:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:36:55,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:36:55,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:36:55,871 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) [2022-07-12 18:36:55,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:36:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:36:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:36:55,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:36:56,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:36:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:36:56,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:36:56,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:36:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618897426] [2022-07-12 18:36:56,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:36:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656905945] [2022-07-12 18:36:56,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656905945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:36:56,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:36:56,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:36:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549414838] [2022-07-12 18:36:56,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:36:56,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:36:56,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:36:56,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:36:56,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:36:56,104 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-07-12 18:36:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:36:56,116 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2022-07-12 18:36:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:36:56,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-07-12 18:36:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:36:56,117 INFO L225 Difference]: With dead ends: 178 [2022-07-12 18:36:56,118 INFO L226 Difference]: Without dead ends: 178 [2022-07-12 18:36:56,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:36:56,119 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:36:56,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 325 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-07-12 18:36:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-12 18:36:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-07-12 18:36:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:36:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2022-07-12 18:36:56,131 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 7 [2022-07-12 18:36:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:36:56,132 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2022-07-12 18:36:56,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-07-12 18:36:56,132 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2022-07-12 18:36:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:36:56,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:36:56,135 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 18:36:56,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 18:36:56,338 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 [2022-07-12 18:36:56,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:36:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:36:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051478, now seen corresponding path program 1 times [2022-07-12 18:36:56,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:36:56,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98241882] [2022-07-12 18:36:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:36:56,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:36:56,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:36:56,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453249354] [2022-07-12 18:36:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:36:56,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:36:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:36:56,369 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) [2022-07-12 18:36:56,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:36:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:36:56,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:36:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:36:56,680 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:36:56,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:36:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:36:56,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:36:56,914 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:36:56,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:36:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:36:56,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:36:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98241882] [2022-07-12 18:36:56,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:36:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453249354] [2022-07-12 18:36:56,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453249354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:36:56,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:36:56,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-12 18:36:56,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584524347] [2022-07-12 18:36:56,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:36:56,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:36:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:36:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:36:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:36:56,933 INFO L87 Difference]: Start difference. First operand 178 states and 193 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-07-12 18:37:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:05,454 INFO L93 Difference]: Finished difference Result 223 states and 243 transitions. [2022-07-12 18:37:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:37:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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 73 [2022-07-12 18:37:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:05,457 INFO L225 Difference]: With dead ends: 223 [2022-07-12 18:37:05,457 INFO L226 Difference]: Without dead ends: 223 [2022-07-12 18:37:05,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:37:05,459 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 125 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:05,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1284 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 590 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2022-07-12 18:37:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-12 18:37:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 187. [2022-07-12 18:37:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 112 states have (on average 1.7053571428571428) internal successors, (191), 177 states have internal predecessors, (191), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:37:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2022-07-12 18:37:05,470 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 73 [2022-07-12 18:37:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:05,470 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2022-07-12 18:37:05,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-07-12 18:37:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2022-07-12 18:37:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:37:05,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:05,472 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 18:37:05,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:05,686 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 [2022-07-12 18:37:05,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051477, now seen corresponding path program 1 times [2022-07-12 18:37:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:05,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464972348] [2022-07-12 18:37:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:05,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65275318] [2022-07-12 18:37:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:05,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:05,723 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) [2022-07-12 18:37:05,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:37:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:05,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 18:37:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:05,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:06,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:06,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2022-07-12 18:37:06,375 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:06,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:37:06,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:10,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:10,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464972348] [2022-07-12 18:37:10,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:10,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65275318] [2022-07-12 18:37:10,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65275318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:10,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:10,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-12 18:37:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739846983] [2022-07-12 18:37:10,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:10,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:37:10,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:37:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:37:10,572 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-07-12 18:37:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:11,221 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2022-07-12 18:37:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:37:11,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 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 73 [2022-07-12 18:37:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:11,222 INFO L225 Difference]: With dead ends: 186 [2022-07-12 18:37:11,223 INFO L226 Difference]: Without dead ends: 186 [2022-07-12 18:37:11,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:37:11,224 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 2 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:11,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1119 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 516 Invalid, 0 Unknown, 311 Unchecked, 0.4s Time] [2022-07-12 18:37:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-12 18:37:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-07-12 18:37:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 112 states have (on average 1.6875) internal successors, (189), 176 states have internal predecessors, (189), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:37:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2022-07-12 18:37:11,230 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 73 [2022-07-12 18:37:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:11,231 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2022-07-12 18:37:11,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-07-12 18:37:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2022-07-12 18:37:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 18:37:11,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:11,233 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 18:37:11,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:11,439 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 [2022-07-12 18:37:11,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash 120292531, now seen corresponding path program 1 times [2022-07-12 18:37:11,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:11,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944354420] [2022-07-12 18:37:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:11,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034373754] [2022-07-12 18:37:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:11,475 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) [2022-07-12 18:37:11,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:37:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:11,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:37:11,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:11,790 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:11,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 18:37:11,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:12,001 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:12,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 18:37:12,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944354420] [2022-07-12 18:37:12,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034373754] [2022-07-12 18:37:12,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034373754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:12,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:12,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-12 18:37:12,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262233168] [2022-07-12 18:37:12,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:12,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:12,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:37:12,025 INFO L87 Difference]: Start difference. First operand 186 states and 202 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2022-07-12 18:37:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:12,362 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2022-07-12 18:37:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:37:12,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 74 [2022-07-12 18:37:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:12,365 INFO L225 Difference]: With dead ends: 220 [2022-07-12 18:37:12,365 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 18:37:12,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:37:12,366 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 108 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:12,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1272 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 554 Invalid, 0 Unknown, 193 Unchecked, 0.3s Time] [2022-07-12 18:37:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 18:37:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2022-07-12 18:37:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 111 states have (on average 1.6846846846846846) internal successors, (187), 175 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:37:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2022-07-12 18:37:12,378 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 74 [2022-07-12 18:37:12,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:12,378 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2022-07-12 18:37:12,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2022-07-12 18:37:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2022-07-12 18:37:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:37:12,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:12,385 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 18:37:12,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:12,609 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 [2022-07-12 18:37:12,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639435, now seen corresponding path program 1 times [2022-07-12 18:37:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:12,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975737377] [2022-07-12 18:37:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:12,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:12,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13809150] [2022-07-12 18:37:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:12,630 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) [2022-07-12 18:37:12,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:37:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:37:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:12,914 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:12,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:12,987 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:12,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 18:37:13,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:13,318 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:13,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 18:37:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:13,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975737377] [2022-07-12 18:37:13,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13809150] [2022-07-12 18:37:13,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13809150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:13,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:13,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-12 18:37:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703149419] [2022-07-12 18:37:13,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:37:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:37:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:37:13,333 INFO L87 Difference]: Start difference. First operand 184 states and 200 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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) [2022-07-12 18:37:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:21,829 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2022-07-12 18:37:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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 75 [2022-07-12 18:37:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:21,831 INFO L225 Difference]: With dead ends: 243 [2022-07-12 18:37:21,831 INFO L226 Difference]: Without dead ends: 243 [2022-07-12 18:37:21,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:37:21,832 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 203 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:21,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1230 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 664 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-07-12 18:37:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-12 18:37:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 208. [2022-07-12 18:37:21,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.5909090909090908) internal successors, (210), 195 states have internal predecessors, (210), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-12 18:37:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2022-07-12 18:37:21,842 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 75 [2022-07-12 18:37:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:21,845 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2022-07-12 18:37:21,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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) [2022-07-12 18:37:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2022-07-12 18:37:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:37:21,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:21,852 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 18:37:21,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:22,052 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 [2022-07-12 18:37:22,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:22,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639436, now seen corresponding path program 1 times [2022-07-12 18:37:22,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:22,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563805956] [2022-07-12 18:37:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:22,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:22,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:22,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432788774] [2022-07-12 18:37:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:22,075 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) [2022-07-12 18:37:22,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:37:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:22,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 18:37:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:22,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:22,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:37:22,917 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:22,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:23,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:23,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:37:23,111 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:23,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 18:37:23,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:23,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563805956] [2022-07-12 18:37:23,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:23,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432788774] [2022-07-12 18:37:23,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432788774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:23,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:23,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-12 18:37:23,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280968974] [2022-07-12 18:37:23,294 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:23,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:37:23,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:37:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:37:23,295 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:23,558 INFO L93 Difference]: Finished difference Result 222 states and 252 transitions. [2022-07-12 18:37:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:37:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2022-07-12 18:37:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:23,560 INFO L225 Difference]: With dead ends: 222 [2022-07-12 18:37:23,560 INFO L226 Difference]: Without dead ends: 222 [2022-07-12 18:37:23,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:37:23,561 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:23,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1504 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 1105 Unchecked, 0.1s Time] [2022-07-12 18:37:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-12 18:37:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-07-12 18:37:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 143 states have (on average 1.5524475524475525) internal successors, (222), 206 states have internal predecessors, (222), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:37:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2022-07-12 18:37:23,574 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 75 [2022-07-12 18:37:23,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:23,574 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2022-07-12 18:37:23,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2022-07-12 18:37:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:37:23,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:23,576 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 18:37:23,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:23,783 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 [2022-07-12 18:37:23,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:23,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1045374201, now seen corresponding path program 1 times [2022-07-12 18:37:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:23,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286556021] [2022-07-12 18:37:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:23,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:23,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:23,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065147509] [2022-07-12 18:37:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:23,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:23,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:23,819 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) [2022-07-12 18:37:23,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:37:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 18:37:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 18:37:24,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:24,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286556021] [2022-07-12 18:37:24,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065147509] [2022-07-12 18:37:24,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065147509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:24,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:24,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:37:24,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842865159] [2022-07-12 18:37:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:24,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:37:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:37:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:37:24,033 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:24,099 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2022-07-12 18:37:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:37:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-12 18:37:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:24,102 INFO L225 Difference]: With dead ends: 200 [2022-07-12 18:37:24,102 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 18:37:24,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:37:24,104 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:24,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 874 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 18:37:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 175. [2022-07-12 18:37:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 167 states have internal predecessors, (178), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:37:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2022-07-12 18:37:24,109 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 76 [2022-07-12 18:37:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:24,109 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2022-07-12 18:37:24,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2022-07-12 18:37:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 18:37:24,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:24,110 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:24,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:24,334 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 [2022-07-12 18:37:24,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:24,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1898289451, now seen corresponding path program 1 times [2022-07-12 18:37:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:24,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697166726] [2022-07-12 18:37:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:24,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:24,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105408720] [2022-07-12 18:37:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:24,352 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) [2022-07-12 18:37:24,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:37:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:37:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:24,679 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:24,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:24,754 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:24,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-12 18:37:24,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:25,045 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:25,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-12 18:37:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697166726] [2022-07-12 18:37:25,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105408720] [2022-07-12 18:37:25,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105408720] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:25,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:25,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-12 18:37:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293007611] [2022-07-12 18:37:25,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:37:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:37:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:37:25,062 INFO L87 Difference]: Start difference. First operand 175 states and 190 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-12 18:37:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:33,553 INFO L93 Difference]: Finished difference Result 227 states and 248 transitions. [2022-07-12 18:37:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:33,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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 81 [2022-07-12 18:37:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:33,554 INFO L225 Difference]: With dead ends: 227 [2022-07-12 18:37:33,555 INFO L226 Difference]: Without dead ends: 227 [2022-07-12 18:37:33,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:37:33,556 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 202 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1120 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 664 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-07-12 18:37:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-12 18:37:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 192. [2022-07-12 18:37:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 118 states have (on average 1.6440677966101696) internal successors, (194), 181 states have internal predecessors, (194), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:37:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 210 transitions. [2022-07-12 18:37:33,561 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 210 transitions. Word has length 81 [2022-07-12 18:37:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:33,562 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 210 transitions. [2022-07-12 18:37:33,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-12 18:37:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 210 transitions. [2022-07-12 18:37:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 18:37:33,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:33,563 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:33,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:33,777 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 [2022-07-12 18:37:33,777 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:33,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:33,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1898289452, now seen corresponding path program 2 times [2022-07-12 18:37:33,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:33,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88587073] [2022-07-12 18:37:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:33,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:33,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:33,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674327835] [2022-07-12 18:37:33,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:37:33,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:33,799 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) [2022-07-12 18:37:33,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:37:34,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:37:34,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:37:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:34,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:34,374 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:34,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:34,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:37:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:34,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:37:34,513 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:34,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 118 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 18:37:34,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:36,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88587073] [2022-07-12 18:37:36,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674327835] [2022-07-12 18:37:36,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674327835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:36,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:36,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-12 18:37:36,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226452876] [2022-07-12 18:37:36,680 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:36,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:37:36,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:37:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:37:36,681 INFO L87 Difference]: Start difference. First operand 192 states and 210 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-12 18:37:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:37,266 INFO L93 Difference]: Finished difference Result 368 states and 398 transitions. [2022-07-12 18:37:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:37:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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 81 [2022-07-12 18:37:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:37,269 INFO L225 Difference]: With dead ends: 368 [2022-07-12 18:37:37,269 INFO L226 Difference]: Without dead ends: 368 [2022-07-12 18:37:37,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:37:37,270 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 279 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:37,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1244 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 941 Invalid, 0 Unknown, 368 Unchecked, 0.5s Time] [2022-07-12 18:37:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-12 18:37:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 195. [2022-07-12 18:37:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 121 states have (on average 1.628099173553719) internal successors, (197), 184 states have internal predecessors, (197), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:37:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 213 transitions. [2022-07-12 18:37:37,276 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 213 transitions. Word has length 81 [2022-07-12 18:37:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:37,277 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 213 transitions. [2022-07-12 18:37:37,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-12 18:37:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 213 transitions. [2022-07-12 18:37:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:37:37,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:37,278 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:37,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:37,487 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 [2022-07-12 18:37:37,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1282569151, now seen corresponding path program 1 times [2022-07-12 18:37:37,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:37,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445845385] [2022-07-12 18:37:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:37,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:37,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33493684] [2022-07-12 18:37:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:37,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:37,507 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) [2022-07-12 18:37:37,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:37:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:37,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:37:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-12 18:37:37,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:37,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 6 [2022-07-12 18:37:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-12 18:37:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445845385] [2022-07-12 18:37:37,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33493684] [2022-07-12 18:37:37,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33493684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:37,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:37,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 18:37:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606859251] [2022-07-12 18:37:37,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:37:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:37:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:37:37,824 INFO L87 Difference]: Start difference. First operand 195 states and 213 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:38,059 INFO L93 Difference]: Finished difference Result 213 states and 237 transitions. [2022-07-12 18:37:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:37:38,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-07-12 18:37:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:38,060 INFO L225 Difference]: With dead ends: 213 [2022-07-12 18:37:38,060 INFO L226 Difference]: Without dead ends: 213 [2022-07-12 18:37:38,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:37:38,061 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 331 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:38,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 960 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:37:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-12 18:37:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 194. [2022-07-12 18:37:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 121 states have (on average 1.6115702479338843) internal successors, (195), 183 states have internal predecessors, (195), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:37:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 211 transitions. [2022-07-12 18:37:38,066 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 211 transitions. Word has length 82 [2022-07-12 18:37:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:38,066 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 211 transitions. [2022-07-12 18:37:38,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 211 transitions. [2022-07-12 18:37:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-12 18:37:38,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:38,067 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:38,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 18:37:38,275 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 [2022-07-12 18:37:38,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1350797929, now seen corresponding path program 1 times [2022-07-12 18:37:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491062099] [2022-07-12 18:37:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:38,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:38,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075124281] [2022-07-12 18:37:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:38,304 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) [2022-07-12 18:37:38,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:37:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:37:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:38,623 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:38,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:38,684 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:38,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:38,770 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:38,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 97 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 18:37:38,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:38,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491062099] [2022-07-12 18:37:38,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:38,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075124281] [2022-07-12 18:37:38,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075124281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:38,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:38,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 18:37:38,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482078923] [2022-07-12 18:37:38,980 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:38,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:37:38,982 INFO L87 Difference]: Start difference. First operand 194 states and 211 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:39,356 INFO L93 Difference]: Finished difference Result 276 states and 302 transitions. [2022-07-12 18:37:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:37:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 88 [2022-07-12 18:37:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:39,361 INFO L225 Difference]: With dead ends: 276 [2022-07-12 18:37:39,361 INFO L226 Difference]: Without dead ends: 276 [2022-07-12 18:37:39,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:37:39,362 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 158 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:39,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1422 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 647 Invalid, 0 Unknown, 271 Unchecked, 0.3s Time] [2022-07-12 18:37:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-12 18:37:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 240. [2022-07-12 18:37:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 161 states have (on average 1.4968944099378882) internal successors, (241), 222 states have internal predecessors, (241), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2022-07-12 18:37:39,368 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 88 [2022-07-12 18:37:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:39,369 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2022-07-12 18:37:39,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2022-07-12 18:37:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-12 18:37:39,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:39,370 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:39,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:39,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 18:37:39,588 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:39,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1350797930, now seen corresponding path program 1 times [2022-07-12 18:37:39,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:39,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822130687] [2022-07-12 18:37:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:39,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:39,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:39,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119050623] [2022-07-12 18:37:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:39,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:39,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:39,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:37:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 18:37:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:39,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-12 18:37:39,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:42,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 46 [2022-07-12 18:37:42,055 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:42,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:42,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 41 [2022-07-12 18:37:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 90 proven. 22 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-12 18:37:42,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:42,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:42,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822130687] [2022-07-12 18:37:42,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:42,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119050623] [2022-07-12 18:37:42,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119050623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:42,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:42,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-12 18:37:42,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425378372] [2022-07-12 18:37:42,901 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:42,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:37:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:42,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:37:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:37:42,902 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-12 18:37:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:44,372 INFO L93 Difference]: Finished difference Result 276 states and 320 transitions. [2022-07-12 18:37:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:37:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 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 88 [2022-07-12 18:37:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:44,374 INFO L225 Difference]: With dead ends: 276 [2022-07-12 18:37:44,374 INFO L226 Difference]: Without dead ends: 264 [2022-07-12 18:37:44,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:37:44,375 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:44,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1268 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 386 Invalid, 0 Unknown, 450 Unchecked, 0.4s Time] [2022-07-12 18:37:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-12 18:37:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-07-12 18:37:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 181 states have (on average 1.4640883977900552) internal successors, (265), 246 states have internal predecessors, (265), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2022-07-12 18:37:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2022-07-12 18:37:44,385 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 88 [2022-07-12 18:37:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:44,385 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2022-07-12 18:37:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-12 18:37:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2022-07-12 18:37:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 18:37:44,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:44,386 INFO L195 NwaCegarLoop]: trace histogram [7, 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] [2022-07-12 18:37:44,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:44,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 18:37:44,604 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1452318619, now seen corresponding path program 2 times [2022-07-12 18:37:44,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:44,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537612113] [2022-07-12 18:37:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:44,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:44,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:44,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563785008] [2022-07-12 18:37:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:37:44,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:44,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:44,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:37:44,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:37:44,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:44,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-12 18:37:44,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:44,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:44,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:45,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2022-07-12 18:37:45,434 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:45,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:45,738 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:37:45,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 18:37:45,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-12 18:37:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:45,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-12 18:37:45,985 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 18:37:45,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-12 18:37:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 39 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 18:37:46,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:52,317 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:37:52,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537612113] [2022-07-12 18:37:52,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563785008] [2022-07-12 18:37:52,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563785008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:52,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:52,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-12 18:37:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115719011] [2022-07-12 18:37:52,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:52,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:37:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:37:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:37:52,319 INFO L87 Difference]: Start difference. First operand 264 states and 300 transitions. Second operand has 17 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:37:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:53,138 INFO L93 Difference]: Finished difference Result 318 states and 356 transitions. [2022-07-12 18:37:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:37:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 89 [2022-07-12 18:37:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:53,141 INFO L225 Difference]: With dead ends: 318 [2022-07-12 18:37:53,141 INFO L226 Difference]: Without dead ends: 303 [2022-07-12 18:37:53,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:37:53,142 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 5 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 631 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:53,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1311 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 483 Invalid, 0 Unknown, 631 Unchecked, 0.5s Time] [2022-07-12 18:37:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-12 18:37:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 283. [2022-07-12 18:37:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 200 states have (on average 1.425) internal successors, (285), 262 states have internal predecessors, (285), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-12 18:37:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2022-07-12 18:37:53,152 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 89 [2022-07-12 18:37:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:53,153 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2022-07-12 18:37:53,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:37:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2022-07-12 18:37:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 18:37:53,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:53,154 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:53,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:53,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:53,375 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:53,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2072204227, now seen corresponding path program 1 times [2022-07-12 18:37:53,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:53,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742105132] [2022-07-12 18:37:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:53,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728684531] [2022-07-12 18:37:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:53,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:53,398 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:53,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:37:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:37:53,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-12 18:37:53,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:53,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:53,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742105132] [2022-07-12 18:37:53,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:53,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728684531] [2022-07-12 18:37:53,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728684531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:53,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:53,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:37:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626145603] [2022-07-12 18:37:53,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:37:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:37:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:37:53,599 INFO L87 Difference]: Start difference. First operand 283 states and 312 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:53,707 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-07-12 18:37:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:37:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-07-12 18:37:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:53,709 INFO L225 Difference]: With dead ends: 322 [2022-07-12 18:37:53,709 INFO L226 Difference]: Without dead ends: 322 [2022-07-12 18:37:53,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:37:53,710 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 271 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:53,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 273 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-07-12 18:37:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2022-07-12 18:37:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 200 states have (on average 1.42) internal successors, (284), 261 states have internal predecessors, (284), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-12 18:37:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 311 transitions. [2022-07-12 18:37:53,717 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 311 transitions. Word has length 90 [2022-07-12 18:37:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:53,718 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 311 transitions. [2022-07-12 18:37:53,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 311 transitions. [2022-07-12 18:37:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 18:37:53,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:53,719 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:53,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 18:37:53,944 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2072204226, now seen corresponding path program 1 times [2022-07-12 18:37:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773059791] [2022-07-12 18:37:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:53,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:53,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42175390] [2022-07-12 18:37:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:53,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:53,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:53,971 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:54,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:37:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 18:37:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:54,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-12 18:37:54,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:55,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:55,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-07-12 18:37:55,217 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:55,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:55,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:55,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-07-12 18:37:55,478 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:55,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 108 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 18:37:56,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:57,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:57,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773059791] [2022-07-12 18:37:57,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:57,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42175390] [2022-07-12 18:37:57,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42175390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:57,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:57,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-12 18:37:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465882183] [2022-07-12 18:37:57,522 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:57,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:37:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:37:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:37:57,523 INFO L87 Difference]: Start difference. First operand 282 states and 311 transitions. Second operand has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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) [2022-07-12 18:37:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:58,125 INFO L93 Difference]: Finished difference Result 376 states and 439 transitions. [2022-07-12 18:37:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:37:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 90 [2022-07-12 18:37:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:58,129 INFO L225 Difference]: With dead ends: 376 [2022-07-12 18:37:58,129 INFO L226 Difference]: Without dead ends: 376 [2022-07-12 18:37:58,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:37:58,130 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1218 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:58,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1783 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 1218 Unchecked, 0.1s Time] [2022-07-12 18:37:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-07-12 18:37:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 337. [2022-07-12 18:37:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 247 states have (on average 1.3724696356275303) internal successors, (339), 310 states have internal predecessors, (339), 17 states have call successors, (17), 7 states have call predecessors, (17), 12 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2022-07-12 18:37:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 388 transitions. [2022-07-12 18:37:58,140 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 388 transitions. Word has length 90 [2022-07-12 18:37:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:58,140 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 388 transitions. [2022-07-12 18:37:58,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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) [2022-07-12 18:37:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 388 transitions. [2022-07-12 18:37:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 18:37:58,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:58,142 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:58,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:58,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 18:37:58,355 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:37:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1015753557, now seen corresponding path program 2 times [2022-07-12 18:37:58,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:58,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585176312] [2022-07-12 18:37:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:58,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:58,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:58,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259352880] [2022-07-12 18:37:58,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:37:58,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:58,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:58,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:58,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:37:58,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:37:58,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:58,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-12 18:37:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:58,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:37:58,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-12 18:38:07,096 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:07,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 29 [2022-07-12 18:38:07,880 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:07,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:12,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:12,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-07-12 18:38:13,029 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:38:13,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 119 proven. 49 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-12 18:38:17,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:18,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585176312] [2022-07-12 18:38:18,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259352880] [2022-07-12 18:38:18,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259352880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:18,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:18,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-07-12 18:38:18,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300107726] [2022-07-12 18:38:18,444 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:18,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 18:38:18,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 18:38:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:38:18,446 INFO L87 Difference]: Start difference. First operand 337 states and 388 transitions. Second operand has 28 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:38:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:22,867 INFO L93 Difference]: Finished difference Result 544 states and 641 transitions. [2022-07-12 18:38:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:38:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 91 [2022-07-12 18:38:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:22,872 INFO L225 Difference]: With dead ends: 544 [2022-07-12 18:38:22,873 INFO L226 Difference]: Without dead ends: 544 [2022-07-12 18:38:22,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:38:22,874 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 143 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2097 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:22,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 3280 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 2097 Unchecked, 0.1s Time] [2022-07-12 18:38:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-07-12 18:38:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 366. [2022-07-12 18:38:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 269 states have (on average 1.3568773234200744) internal successors, (365), 335 states have internal predecessors, (365), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (50), 23 states have call predecessors, (50), 21 states have call successors, (50) [2022-07-12 18:38:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 436 transitions. [2022-07-12 18:38:22,894 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 436 transitions. Word has length 91 [2022-07-12 18:38:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:22,894 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 436 transitions. [2022-07-12 18:38:22,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:38:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 436 transitions. [2022-07-12 18:38:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 18:38:22,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:22,896 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:22,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:23,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 18:38:23,120 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1372254073, now seen corresponding path program 3 times [2022-07-12 18:38:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:23,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483802678] [2022-07-12 18:38:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:23,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:23,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745793850] [2022-07-12 18:38:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:38:23,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:23,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:23,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:23,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:38:23,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:38:23,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:38:23,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 18:38:23,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 18:38:23,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:23,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483802678] [2022-07-12 18:38:23,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:23,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745793850] [2022-07-12 18:38:23,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745793850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:23,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:23,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 18:38:23,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384964383] [2022-07-12 18:38:23,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:23,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:38:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:38:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:38:23,711 INFO L87 Difference]: Start difference. First operand 366 states and 436 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 18:38:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:23,888 INFO L93 Difference]: Finished difference Result 385 states and 435 transitions. [2022-07-12 18:38:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:38:23,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 91 [2022-07-12 18:38:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:23,894 INFO L225 Difference]: With dead ends: 385 [2022-07-12 18:38:23,894 INFO L226 Difference]: Without dead ends: 355 [2022-07-12 18:38:23,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:38:23,895 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 65 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:23,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 857 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-12 18:38:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 321. [2022-07-12 18:38:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 237 states have (on average 1.3881856540084387) internal successors, (329), 297 states have internal predecessors, (329), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:38:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 355 transitions. [2022-07-12 18:38:23,910 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 355 transitions. Word has length 91 [2022-07-12 18:38:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:23,911 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 355 transitions. [2022-07-12 18:38:23,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 18:38:23,911 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 355 transitions. [2022-07-12 18:38:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-12 18:38:23,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:23,912 INFO L195 NwaCegarLoop]: trace histogram [14, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:23,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:24,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:24,140 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash -849515239, now seen corresponding path program 4 times [2022-07-12 18:38:24,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:24,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645852941] [2022-07-12 18:38:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:24,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544424114] [2022-07-12 18:38:24,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:38:24,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:24,161 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:24,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:38:24,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:38:24,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-12 18:38:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:24,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-12 18:38:24,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:24,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:26,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 32 [2022-07-12 18:38:26,350 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:26,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:26,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 32 [2022-07-12 18:38:26,698 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:38:26,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 155 proven. 109 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 18:38:27,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:27,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645852941] [2022-07-12 18:38:27,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544424114] [2022-07-12 18:38:27,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544424114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:27,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:27,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 18:38:27,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701040252] [2022-07-12 18:38:27,914 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:27,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:38:27,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:38:27,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:38:27,916 INFO L87 Difference]: Start difference. First operand 321 states and 355 transitions. Second operand has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 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) [2022-07-12 18:38:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:29,283 INFO L93 Difference]: Finished difference Result 392 states and 443 transitions. [2022-07-12 18:38:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:38:29,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 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 97 [2022-07-12 18:38:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:29,286 INFO L225 Difference]: With dead ends: 392 [2022-07-12 18:38:29,286 INFO L226 Difference]: Without dead ends: 392 [2022-07-12 18:38:29,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:38:29,287 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 5 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:29,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1899 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 1153 Unchecked, 0.1s Time] [2022-07-12 18:38:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-12 18:38:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 364. [2022-07-12 18:38:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 274 states have (on average 1.3576642335766422) internal successors, (372), 334 states have internal predecessors, (372), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2022-07-12 18:38:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 411 transitions. [2022-07-12 18:38:29,295 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 411 transitions. Word has length 97 [2022-07-12 18:38:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:29,295 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 411 transitions. [2022-07-12 18:38:29,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 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) [2022-07-12 18:38:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 411 transitions. [2022-07-12 18:38:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-12 18:38:29,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:29,297 INFO L195 NwaCegarLoop]: trace histogram [15, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:29,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-12 18:38:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:29,512 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 745840980, now seen corresponding path program 5 times [2022-07-12 18:38:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425892305] [2022-07-12 18:38:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:29,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:29,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:29,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128213758] [2022-07-12 18:38:29,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:38:29,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:29,532 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:29,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:38:29,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:38:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 18:38:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 170 proven. 3 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 18:38:29,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-12 18:38:29,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425892305] [2022-07-12 18:38:29,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128213758] [2022-07-12 18:38:29,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128213758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:29,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:29,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-12 18:38:29,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377294433] [2022-07-12 18:38:29,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:29,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:38:29,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:29,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:38:29,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:38:29,937 INFO L87 Difference]: Start difference. First operand 364 states and 411 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 18:38:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:30,158 INFO L93 Difference]: Finished difference Result 405 states and 451 transitions. [2022-07-12 18:38:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:38:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 98 [2022-07-12 18:38:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:30,161 INFO L225 Difference]: With dead ends: 405 [2022-07-12 18:38:30,161 INFO L226 Difference]: Without dead ends: 345 [2022-07-12 18:38:30,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:38:30,162 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 51 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:30,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1038 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-12 18:38:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-07-12 18:38:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 261 states have (on average 1.3295019157088122) internal successors, (347), 321 states have internal predecessors, (347), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:38:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 373 transitions. [2022-07-12 18:38:30,168 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 373 transitions. Word has length 98 [2022-07-12 18:38:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:30,168 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 373 transitions. [2022-07-12 18:38:30,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 18:38:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 373 transitions. [2022-07-12 18:38:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-12 18:38:30,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:30,169 INFO L195 NwaCegarLoop]: trace histogram [34, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:30,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:30,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 18:38:30,395 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:30,396 INFO L85 PathProgramCache]: Analyzing trace with hash 572964953, now seen corresponding path program 6 times [2022-07-12 18:38:30,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:30,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52162068] [2022-07-12 18:38:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:30,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:30,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:30,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402106610] [2022-07-12 18:38:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:38:30,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:30,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:30,440 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:30,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:38:35,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 18:38:35,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 18:38:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 392 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-07-12 18:38:35,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 210 proven. 10 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-07-12 18:38:36,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52162068] [2022-07-12 18:38:36,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402106610] [2022-07-12 18:38:36,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402106610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:36,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:36,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2022-07-12 18:38:36,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31985329] [2022-07-12 18:38:36,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:36,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:38:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:36,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:38:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:38:36,438 INFO L87 Difference]: Start difference. First operand 345 states and 373 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-12 18:38:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:37,331 INFO L93 Difference]: Finished difference Result 409 states and 453 transitions. [2022-07-12 18:38:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:38:37,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 117 [2022-07-12 18:38:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:37,333 INFO L225 Difference]: With dead ends: 409 [2022-07-12 18:38:37,333 INFO L226 Difference]: Without dead ends: 369 [2022-07-12 18:38:37,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1762, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:38:37,335 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 98 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:37,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 2201 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:38:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-12 18:38:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2022-07-12 18:38:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 285 states have (on average 1.3017543859649123) internal successors, (371), 345 states have internal predecessors, (371), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:38:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 397 transitions. [2022-07-12 18:38:37,341 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 397 transitions. Word has length 117 [2022-07-12 18:38:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:37,341 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 397 transitions. [2022-07-12 18:38:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-12 18:38:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 397 transitions. [2022-07-12 18:38:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 18:38:37,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:37,342 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:37,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:37,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 18:38:37,556 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:37,556 INFO L85 PathProgramCache]: Analyzing trace with hash 752331705, now seen corresponding path program 7 times [2022-07-12 18:38:37,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:37,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187479111] [2022-07-12 18:38:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:37,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:37,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:37,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753549085] [2022-07-12 18:38:37,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:38:37,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:37,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:37,601 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:37,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:38:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 18:38:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:39,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:39,754 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:39,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:39,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:38:39,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:39,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:38:39,929 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:38:39,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 596 proven. 224 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-07-12 18:38:39,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:44,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:44,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187479111] [2022-07-12 18:38:44,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:44,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753549085] [2022-07-12 18:38:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753549085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:44,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:44,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 18:38:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845215213] [2022-07-12 18:38:44,173 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:44,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:38:44,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:38:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:38:44,174 INFO L87 Difference]: Start difference. First operand 369 states and 397 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:38:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:44,737 INFO L93 Difference]: Finished difference Result 540 states and 582 transitions. [2022-07-12 18:38:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:38:44,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 123 [2022-07-12 18:38:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:44,740 INFO L225 Difference]: With dead ends: 540 [2022-07-12 18:38:44,740 INFO L226 Difference]: Without dead ends: 540 [2022-07-12 18:38:44,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:38:44,741 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 168 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:44,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1124 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 928 Invalid, 0 Unknown, 219 Unchecked, 0.5s Time] [2022-07-12 18:38:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-12 18:38:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 374. [2022-07-12 18:38:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 290 states have (on average 1.306896551724138) internal successors, (379), 350 states have internal predecessors, (379), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:38:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 405 transitions. [2022-07-12 18:38:44,750 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 405 transitions. Word has length 123 [2022-07-12 18:38:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:44,750 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 405 transitions. [2022-07-12 18:38:44,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:38:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 405 transitions. [2022-07-12 18:38:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 18:38:44,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:44,752 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:44,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-12 18:38:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:44,975 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1436262970, now seen corresponding path program 1 times [2022-07-12 18:38:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569295540] [2022-07-12 18:38:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:45,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:45,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423030189] [2022-07-12 18:38:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:45,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:45,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:45,006 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:45,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:38:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:38:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2022-07-12 18:38:45,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:45,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569295540] [2022-07-12 18:38:45,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423030189] [2022-07-12 18:38:45,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423030189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:45,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:45,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:38:45,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405962519] [2022-07-12 18:38:45,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:45,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:38:45,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:38:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:45,386 INFO L87 Difference]: Start difference. First operand 374 states and 405 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:45,461 INFO L93 Difference]: Finished difference Result 379 states and 413 transitions. [2022-07-12 18:38:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:38:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-07-12 18:38:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:45,462 INFO L225 Difference]: With dead ends: 379 [2022-07-12 18:38:45,462 INFO L226 Difference]: Without dead ends: 379 [2022-07-12 18:38:45,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:45,463 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 137 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:45,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-12 18:38:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 373. [2022-07-12 18:38:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 290 states have (on average 1.303448275862069) internal successors, (378), 349 states have internal predecessors, (378), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:38:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 404 transitions. [2022-07-12 18:38:45,470 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 404 transitions. Word has length 125 [2022-07-12 18:38:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:45,470 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 404 transitions. [2022-07-12 18:38:45,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 404 transitions. [2022-07-12 18:38:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 18:38:45,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:45,471 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:45,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:45,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:45,687 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash -30332895, now seen corresponding path program 1 times [2022-07-12 18:38:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:45,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152817425] [2022-07-12 18:38:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:45,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:45,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:45,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123352514] [2022-07-12 18:38:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:45,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:45,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:45,719 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:45,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:38:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:46,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 18:38:46,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:46,218 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:46,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:46,281 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:46,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:46,392 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:46,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:46,524 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:46,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 316 proven. 616 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-12 18:38:46,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:47,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152817425] [2022-07-12 18:38:47,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:47,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123352514] [2022-07-12 18:38:47,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123352514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:47,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:47,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-12 18:38:47,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260736675] [2022-07-12 18:38:47,201 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:47,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:38:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:47,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:38:47,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:38:47,202 INFO L87 Difference]: Start difference. First operand 373 states and 404 transitions. Second operand has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 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) [2022-07-12 18:38:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:51,778 INFO L93 Difference]: Finished difference Result 648 states and 703 transitions. [2022-07-12 18:38:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:38:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 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 129 [2022-07-12 18:38:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:51,781 INFO L225 Difference]: With dead ends: 648 [2022-07-12 18:38:51,781 INFO L226 Difference]: Without dead ends: 648 [2022-07-12 18:38:51,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:38:51,782 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 286 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 646 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:51,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1791 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 715 Invalid, 0 Unknown, 646 Unchecked, 0.3s Time] [2022-07-12 18:38:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-07-12 18:38:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 611. [2022-07-12 18:38:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 508 states have (on average 1.2263779527559056) internal successors, (623), 566 states have internal predecessors, (623), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:38:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 671 transitions. [2022-07-12 18:38:51,793 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 671 transitions. Word has length 129 [2022-07-12 18:38:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:51,793 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 671 transitions. [2022-07-12 18:38:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 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) [2022-07-12 18:38:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 671 transitions. [2022-07-12 18:38:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 18:38:51,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:51,794 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:51,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-12 18:38:52,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-12 18:38:52,007 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:38:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -30332894, now seen corresponding path program 1 times [2022-07-12 18:38:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283497342] [2022-07-12 18:38:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:52,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:52,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:52,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660124185] [2022-07-12 18:38:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:52,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:52,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:52,055 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:38:52,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:38:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 18:38:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:56,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:38:56,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:39:11,762 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:39:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:39:22,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-07-12 18:39:22,743 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:39:22,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:39:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 514 proven. 234 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2022-07-12 18:39:22,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:22,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:22,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283497342] [2022-07-12 18:39:22,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:22,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660124185] [2022-07-12 18:39:22,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660124185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:39:22,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:39:22,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 18:39:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429179352] [2022-07-12 18:39:22,941 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:39:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:39:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=537, Unknown=2, NotChecked=0, Total=600 [2022-07-12 18:39:22,943 INFO L87 Difference]: Start difference. First operand 611 states and 671 transitions. Second operand has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 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) [2022-07-12 18:39:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:32,189 INFO L93 Difference]: Finished difference Result 707 states and 783 transitions. [2022-07-12 18:39:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:39:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 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 129 [2022-07-12 18:39:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:32,192 INFO L225 Difference]: With dead ends: 707 [2022-07-12 18:39:32,192 INFO L226 Difference]: Without dead ends: 643 [2022-07-12 18:39:32,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=130, Invalid=1274, Unknown=2, NotChecked=0, Total=1406 [2022-07-12 18:39:32,193 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 0 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 783 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:32,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1847 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 318 Invalid, 0 Unknown, 783 Unchecked, 0.2s Time] [2022-07-12 18:39:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-07-12 18:39:32,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 619. [2022-07-12 18:39:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 516 states have (on average 1.2228682170542635) internal successors, (631), 574 states have internal predecessors, (631), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:39:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 679 transitions. [2022-07-12 18:39:32,208 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 679 transitions. Word has length 129 [2022-07-12 18:39:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:32,208 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 679 transitions. [2022-07-12 18:39:32,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 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) [2022-07-12 18:39:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 679 transitions. [2022-07-12 18:39:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 18:39:32,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:32,209 INFO L195 NwaCegarLoop]: trace histogram [41, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:32,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:32,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 18:39:32,427 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:39:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash -442397489, now seen corresponding path program 2 times [2022-07-12 18:39:32,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:32,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226531103] [2022-07-12 18:39:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:32,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344717145] [2022-07-12 18:39:32,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:39:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:32,459 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:32,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 18:39:33,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:39:33,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:39:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-12 18:39:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:33,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:39:33,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:39:34,424 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:34,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:39:34,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2022-07-12 18:39:35,103 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:35,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 25 [2022-07-12 18:39:35,147 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:39:35,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 18:39:35,597 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:35,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 25 [2022-07-12 18:39:35,649 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-12 18:39:35,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-12 18:39:37,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:39:37,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-12 18:39:37,468 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-07-12 18:39:37,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-07-12 18:39:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 379 proven. 591 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-12 18:39:37,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:43,934 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:39:43,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226531103] [2022-07-12 18:39:43,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344717145] [2022-07-12 18:39:43,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344717145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:39:43,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:39:43,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-12 18:39:43,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558360039] [2022-07-12 18:39:43,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:43,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:39:43,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:43,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:39:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1121, Unknown=1, NotChecked=0, Total=1260 [2022-07-12 18:39:43,936 INFO L87 Difference]: Start difference. First operand 619 states and 679 transitions. Second operand has 34 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:39:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:45,040 INFO L93 Difference]: Finished difference Result 628 states and 689 transitions. [2022-07-12 18:39:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:39:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 130 [2022-07-12 18:39:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:45,042 INFO L225 Difference]: With dead ends: 628 [2022-07-12 18:39:45,042 INFO L226 Difference]: Without dead ends: 628 [2022-07-12 18:39:45,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=191, Invalid=1614, Unknown=1, NotChecked=0, Total=1806 [2022-07-12 18:39:45,043 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 2 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:45,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1681 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 997 Unchecked, 0.5s Time] [2022-07-12 18:39:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-07-12 18:39:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2022-07-12 18:39:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 523 states have (on average 1.2217973231357553) internal successors, (639), 581 states have internal predecessors, (639), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:39:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 687 transitions. [2022-07-12 18:39:45,052 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 687 transitions. Word has length 130 [2022-07-12 18:39:45,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:45,053 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 687 transitions. [2022-07-12 18:39:45,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:39:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 687 transitions. [2022-07-12 18:39:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-12 18:39:45,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:45,054 INFO L195 NwaCegarLoop]: trace histogram [41, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:45,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:45,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 18:39:45,269 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:39:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:45,269 INFO L85 PathProgramCache]: Analyzing trace with hash -829420247, now seen corresponding path program 1 times [2022-07-12 18:39:45,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:45,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31392369] [2022-07-12 18:39:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:45,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:45,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912711947] [2022-07-12 18:39:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:45,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:45,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:45,306 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:45,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 18:39:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:39:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2022-07-12 18:39:45,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:45,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:45,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31392369] [2022-07-12 18:39:45,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:45,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912711947] [2022-07-12 18:39:45,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912711947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:45,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:45,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:39:45,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886329421] [2022-07-12 18:39:45,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:45,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:39:45,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:39:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:39:45,770 INFO L87 Difference]: Start difference. First operand 626 states and 687 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:39:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:45,860 INFO L93 Difference]: Finished difference Result 660 states and 724 transitions. [2022-07-12 18:39:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:39:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 131 [2022-07-12 18:39:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:45,862 INFO L225 Difference]: With dead ends: 660 [2022-07-12 18:39:45,862 INFO L226 Difference]: Without dead ends: 660 [2022-07-12 18:39:45,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:39:45,863 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 243 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:45,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 272 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:39:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-07-12 18:39:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 625. [2022-07-12 18:39:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 523 states have (on average 1.219885277246654) internal successors, (638), 580 states have internal predecessors, (638), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:39:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 686 transitions. [2022-07-12 18:39:45,876 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 686 transitions. Word has length 131 [2022-07-12 18:39:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:45,877 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 686 transitions. [2022-07-12 18:39:45,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:39:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 686 transitions. [2022-07-12 18:39:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-12 18:39:45,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:45,878 INFO L195 NwaCegarLoop]: trace histogram [41, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:45,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:46,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 18:39:46,099 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:39:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash -829420246, now seen corresponding path program 1 times [2022-07-12 18:39:46,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:46,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366303138] [2022-07-12 18:39:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:46,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:46,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:46,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553976049] [2022-07-12 18:39:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:46,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:46,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:46,132 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:46,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 18:39:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:39:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 112 proven. 203 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-07-12 18:39:46,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:46,834 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:39:46,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 24 [2022-07-12 18:39:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 112 proven. 203 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-07-12 18:39:47,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366303138] [2022-07-12 18:39:47,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553976049] [2022-07-12 18:39:47,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553976049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:39:47,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:39:47,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-12 18:39:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989985303] [2022-07-12 18:39:47,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:39:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:39:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:39:47,066 INFO L87 Difference]: Start difference. First operand 625 states and 686 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:39:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:47,294 INFO L93 Difference]: Finished difference Result 633 states and 697 transitions. [2022-07-12 18:39:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:39:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-07-12 18:39:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:47,297 INFO L225 Difference]: With dead ends: 633 [2022-07-12 18:39:47,297 INFO L226 Difference]: Without dead ends: 633 [2022-07-12 18:39:47,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:39:47,298 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 460 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:47,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1048 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:39:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-07-12 18:39:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 624. [2022-07-12 18:39:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 523 states have (on average 1.2179732313575526) internal successors, (637), 579 states have internal predecessors, (637), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:39:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 685 transitions. [2022-07-12 18:39:47,318 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 685 transitions. Word has length 131 [2022-07-12 18:39:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 685 transitions. [2022-07-12 18:39:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:39:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 685 transitions. [2022-07-12 18:39:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-12 18:39:47,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:47,320 INFO L195 NwaCegarLoop]: trace histogram [41, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:47,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-12 18:39:47,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 18:39:47,535 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:39:47,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1791061547, now seen corresponding path program 1 times [2022-07-12 18:39:47,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:47,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186533492] [2022-07-12 18:39:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:47,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:47,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362640108] [2022-07-12 18:39:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:47,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:47,573 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:47,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 18:39:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:48,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:39:48,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2022-07-12 18:39:48,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:48,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186533492] [2022-07-12 18:39:48,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362640108] [2022-07-12 18:39:48,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362640108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:48,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:48,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:39:48,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515133736] [2022-07-12 18:39:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:48,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:39:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:39:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:39:48,065 INFO L87 Difference]: Start difference. First operand 624 states and 685 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:39:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:48,159 INFO L93 Difference]: Finished difference Result 627 states and 690 transitions. [2022-07-12 18:39:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:39:48,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 133 [2022-07-12 18:39:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:48,161 INFO L225 Difference]: With dead ends: 627 [2022-07-12 18:39:48,161 INFO L226 Difference]: Without dead ends: 627 [2022-07-12 18:39:48,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:39:48,162 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 121 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:48,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 196 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:39:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-07-12 18:39:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 623. [2022-07-12 18:39:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 523 states have (on average 1.2160611854684513) internal successors, (636), 578 states have internal predecessors, (636), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:39:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 684 transitions. [2022-07-12 18:39:48,171 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 684 transitions. Word has length 133 [2022-07-12 18:39:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:48,171 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 684 transitions. [2022-07-12 18:39:48,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:39:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 684 transitions. [2022-07-12 18:39:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-12 18:39:48,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:48,172 INFO L195 NwaCegarLoop]: trace histogram [41, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:48,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:48,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:48,399 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:39:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:48,399 INFO L85 PathProgramCache]: Analyzing trace with hash 851962130, now seen corresponding path program 1 times [2022-07-12 18:39:48,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:48,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753868090] [2022-07-12 18:39:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:48,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:48,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:48,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184177557] [2022-07-12 18:39:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:48,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:48,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:48,442 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:48,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 18:39:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-12 18:39:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:49,231 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:49,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 18:39:49,404 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:39:49,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 18:39:49,711 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-12 18:39:49,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-12 18:39:49,972 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-12 18:39:49,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-07-12 18:39:58,337 INFO L356 Elim1Store]: treesize reduction 40, result has 68.0 percent of original size [2022-07-12 18:39:58,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 133 [2022-07-12 18:40:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 117 proven. 851 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-12 18:40:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:40:03,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:40:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753868090] [2022-07-12 18:40:03,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:40:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184177557] [2022-07-12 18:40:03,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184177557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:40:03,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:40:03,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-07-12 18:40:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409029748] [2022-07-12 18:40:03,623 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:40:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:40:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:40:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:40:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1185, Unknown=4, NotChecked=0, Total=1332 [2022-07-12 18:40:03,624 INFO L87 Difference]: Start difference. First operand 623 states and 684 transitions. Second operand has 35 states, 32 states have (on average 2.53125) internal successors, (81), 29 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:40:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:40:08,010 INFO L93 Difference]: Finished difference Result 927 states and 1018 transitions. [2022-07-12 18:40:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:40:08,011 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.53125) internal successors, (81), 29 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 137 [2022-07-12 18:40:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:40:08,014 INFO L225 Difference]: With dead ends: 927 [2022-07-12 18:40:08,014 INFO L226 Difference]: Without dead ends: 927 [2022-07-12 18:40:08,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=211, Invalid=1853, Unknown=6, NotChecked=0, Total=2070 [2022-07-12 18:40:08,015 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 114 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:40:08,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2105 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 767 Unchecked, 0.2s Time] [2022-07-12 18:40:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-07-12 18:40:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 893. [2022-07-12 18:40:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 770 states have (on average 1.1883116883116882) internal successors, (915), 825 states have internal predecessors, (915), 37 states have call successors, (37), 30 states have call predecessors, (37), 30 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-12 18:40:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 989 transitions. [2022-07-12 18:40:08,028 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 989 transitions. Word has length 137 [2022-07-12 18:40:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:40:08,028 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 989 transitions. [2022-07-12 18:40:08,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.53125) internal successors, (81), 29 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:40:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 989 transitions. [2022-07-12 18:40:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-12 18:40:08,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:40:08,029 INFO L195 NwaCegarLoop]: trace histogram [41, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:40:08,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:40:08,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-12 18:40:08,243 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-12 18:40:08,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:40:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash 851962131, now seen corresponding path program 1 times [2022-07-12 18:40:08,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:40:08,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901541962] [2022-07-12 18:40:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:40:08,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:40:08,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:40:08,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553584622] [2022-07-12 18:40:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:40:08,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:40:08,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:40:08,288 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:40:08,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process