./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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-0235-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:37:00,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:37:00,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:37:00,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:37:00,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:37:00,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:37:00,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:37:00,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:37:00,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:37:00,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:37:00,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:37:00,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:37:00,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:37:00,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:37:00,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:37:00,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:37:00,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:37:00,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:37:00,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:37:00,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:37:00,699 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:37:00,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:37:00,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:37:00,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:37:00,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:37:00,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:37:00,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:37:00,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:37:00,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:37:00,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:37:00,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:37:00,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:37:00,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:37:00,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:37:00,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:37:00,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:37:00,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:37:00,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:37:00,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:37:00,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:37:00,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:37:00,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:37:00,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:37:00,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:37:00,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:37:00,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:37:00,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:37:00,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:37:00,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:37:00,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:37:00,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:37:00,735 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:37:00,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:37:00,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:37:00,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:37:00,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:37:00,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:37:00,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:37:00,737 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:37:00,737 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:37:00,737 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:37:00,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:37:00,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:37:00,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:37:00,738 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:37:00,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:37:00,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:37:00,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:37:00,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:37:00,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:37:00,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:37:00,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:37:00,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:37:00,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2022-07-12 18:37:00,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:37:00,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:37:00,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:37:00,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:37:00,949 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:37:00,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-3.i [2022-07-12 18:37:01,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f47006b7/e65bb99f591e4c33a8504722800d1366/FLAG2d6cf2fb1 [2022-07-12 18:37:01,419 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:37:01,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-3.i [2022-07-12 18:37:01,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f47006b7/e65bb99f591e4c33a8504722800d1366/FLAG2d6cf2fb1 [2022-07-12 18:37:01,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f47006b7/e65bb99f591e4c33a8504722800d1366 [2022-07-12 18:37:01,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:37:01,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:37:01,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:37:01,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:37:01,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:37:01,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d4c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01, skipping insertion in model container [2022-07-12 18:37:01,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:37:01,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:37:01,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:37:01,733 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:37:01,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:37:01,820 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:37:01,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01 WrapperNode [2022-07-12 18:37:01,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:37:01,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:37:01,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:37:01,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:37:01,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,861 INFO L137 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2022-07-12 18:37:01,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:37:01,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:37:01,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:37:01,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:37:01,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:37:01,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:37:01,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:37:01,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:37:01,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (1/1) ... [2022-07-12 18:37:01,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:37:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:01,924 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 18:37:01,932 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 18:37:01,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:37:01,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:37:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:37:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:37:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-12 18:37:01,954 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-12 18:37:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:37:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:37:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-12 18:37:01,954 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-12 18:37:01,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 18:37:01,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:37:01,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:37:02,076 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:37:02,078 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:37:02,415 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:37:02,420 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:37:02,423 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-12 18:37:02,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:37:02 BoogieIcfgContainer [2022-07-12 18:37:02,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:37:02,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:37:02,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:37:02,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:37:02,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:37:01" (1/3) ... [2022-07-12 18:37:02,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1475bdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:37:02, skipping insertion in model container [2022-07-12 18:37:02,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:37:01" (2/3) ... [2022-07-12 18:37:02,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1475bdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:37:02, skipping insertion in model container [2022-07-12 18:37:02,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:37:02" (3/3) ... [2022-07-12 18:37:02,432 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2022-07-12 18:37:02,441 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:37:02,442 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2022-07-12 18:37:02,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:37:02,503 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@424a3580, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26bf7e73 [2022-07-12 18:37:02,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2022-07-12 18:37:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 18:37:02,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:02,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 18:37:02,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-12 18:37:02,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:02,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172721126] [2022-07-12 18:37:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:02,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:02,628 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 18:37:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:02,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172721126] [2022-07-12 18:37:02,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172721126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:02,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:02,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331552465] [2022-07-12 18:37:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:02,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 18:37:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 18:37:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 18:37:02,656 INFO L87 Difference]: Start difference. First operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:37:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:02,679 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2022-07-12 18:37:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 18:37:02,681 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 18:37:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:02,687 INFO L225 Difference]: With dead ends: 243 [2022-07-12 18:37:02,687 INFO L226 Difference]: Without dead ends: 241 [2022-07-12 18:37:02,688 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 18:37:02,690 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:02,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:37:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-12 18:37:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-07-12 18:37:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 225 states have internal predecessors, (246), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2022-07-12 18:37:02,725 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 4 [2022-07-12 18:37:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:02,726 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2022-07-12 18:37:02,726 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 18:37:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2022-07-12 18:37:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:37:02,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:02,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:37:02,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:37:02,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:02,728 INFO L85 PathProgramCache]: Analyzing trace with hash 889942911, now seen corresponding path program 1 times [2022-07-12 18:37:02,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:02,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126860899] [2022-07-12 18:37:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:02,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:02,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092648194] [2022-07-12 18:37:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:02,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:02,741 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 18:37:02,754 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 18:37:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:02,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:37:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:02,885 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 6 treesize of output 5 [2022-07-12 18:37:02,894 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 18:37:02,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:02,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:02,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126860899] [2022-07-12 18:37:02,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:02,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092648194] [2022-07-12 18:37:02,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092648194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:02,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:02,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145350480] [2022-07-12 18:37:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:37:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:37:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:37:02,903 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:37:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:03,017 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2022-07-12 18:37:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:37:03,018 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 18:37:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:03,019 INFO L225 Difference]: With dead ends: 240 [2022-07-12 18:37:03,023 INFO L226 Difference]: Without dead ends: 240 [2022-07-12 18:37:03,023 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 18:37:03,024 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:03,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 438 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-12 18:37:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-07-12 18:37:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 137 states have (on average 1.7883211678832116) internal successors, (245), 224 states have internal predecessors, (245), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2022-07-12 18:37:03,050 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 6 [2022-07-12 18:37:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:03,051 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2022-07-12 18:37:03,051 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 18:37:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2022-07-12 18:37:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:37:03,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:03,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:03,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 18:37:03,267 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 18:37:03,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1818426896, now seen corresponding path program 1 times [2022-07-12 18:37:03,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609991144] [2022-07-12 18:37:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:03,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:03,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:03,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992874838] [2022-07-12 18:37:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:03,281 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 18:37:03,281 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 18:37:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:03,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:37:03,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:03,402 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 18:37:03,465 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 18:37:03,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:03,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609991144] [2022-07-12 18:37:03,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992874838] [2022-07-12 18:37:03,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992874838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:03,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:03,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:03,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140961779] [2022-07-12 18:37:03,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:03,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:37:03,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:37:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:37:03,469 INFO L87 Difference]: Start difference. First operand 240 states and 271 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 18:37:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:03,481 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2022-07-12 18:37:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:37:03,481 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 18:37:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:03,482 INFO L225 Difference]: With dead ends: 239 [2022-07-12 18:37:03,482 INFO L226 Difference]: Without dead ends: 239 [2022-07-12 18:37:03,483 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 18:37:03,485 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:03,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 463 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-07-12 18:37:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-12 18:37:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-07-12 18:37:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 137 states have (on average 1.781021897810219) internal successors, (244), 223 states have internal predecessors, (244), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 270 transitions. [2022-07-12 18:37:03,509 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 270 transitions. Word has length 7 [2022-07-12 18:37:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:03,509 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 270 transitions. [2022-07-12 18:37:03,510 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 18:37:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 270 transitions. [2022-07-12 18:37:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:37:03,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:03,512 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 18:37:03,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:03,728 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 18:37:03,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash 946384938, now seen corresponding path program 1 times [2022-07-12 18:37:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:03,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421213148] [2022-07-12 18:37:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:03,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:03,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266609428] [2022-07-12 18:37:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:03,756 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 18:37:03,757 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 18:37:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:37:03,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:04,037 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:04,037 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 18:37:04,047 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 18:37:04,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:04,211 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:04,211 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 18:37:04,227 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 18:37:04,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421213148] [2022-07-12 18:37:04,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266609428] [2022-07-12 18:37:04,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266609428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:04,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:04,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-12 18:37:04,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641864728] [2022-07-12 18:37:04,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:04,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:04,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:04,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:37:04,231 INFO L87 Difference]: Start difference. First operand 239 states and 270 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 18:37:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:12,698 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2022-07-12 18:37:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:37:12,699 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 18:37:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:12,702 INFO L225 Difference]: With dead ends: 258 [2022-07-12 18:37:12,702 INFO L226 Difference]: Without dead ends: 258 [2022-07-12 18:37:12,703 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 18:37:12,705 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 99 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:12,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1966 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 681 Invalid, 0 Unknown, 262 Unchecked, 0.3s Time] [2022-07-12 18:37:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-12 18:37:12,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2022-07-12 18:37:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 146 states have (on average 1.7397260273972603) internal successors, (254), 230 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-12 18:37:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 281 transitions. [2022-07-12 18:37:12,714 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 281 transitions. Word has length 73 [2022-07-12 18:37:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:12,716 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 281 transitions. [2022-07-12 18:37:12,716 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 18:37:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 281 transitions. [2022-07-12 18:37:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:37:12,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:12,719 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 18:37:12,744 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 18:37:12,931 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 18:37:12,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash 946384939, now seen corresponding path program 1 times [2022-07-12 18:37:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:12,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058222519] [2022-07-12 18:37:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:12,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:12,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:12,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301950899] [2022-07-12 18:37:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:12,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:12,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:12,973 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 18:37:12,975 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 18:37:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:13,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 18:37:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:13,112 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 18:37:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:13,451 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 18:37:13,458 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:13,459 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 18:37:13,485 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 18:37:13,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:17,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:17,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058222519] [2022-07-12 18:37:17,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:17,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301950899] [2022-07-12 18:37:17,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301950899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:17,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:17,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-12 18:37:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060992359] [2022-07-12 18:37:17,620 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:37:17,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:37:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:37:17,621 INFO L87 Difference]: Start difference. First operand 248 states and 281 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 18:37:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:18,768 INFO L93 Difference]: Finished difference Result 348 states and 401 transitions. [2022-07-12 18:37:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:37:18,768 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 18:37:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:18,770 INFO L225 Difference]: With dead ends: 348 [2022-07-12 18:37:18,770 INFO L226 Difference]: Without dead ends: 348 [2022-07-12 18:37:18,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:37:18,770 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 112 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:18,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1027 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1211 Invalid, 0 Unknown, 796 Unchecked, 1.0s Time] [2022-07-12 18:37:18,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-12 18:37:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 247. [2022-07-12 18:37:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.726027397260274) internal successors, (252), 229 states have internal predecessors, (252), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-12 18:37:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 279 transitions. [2022-07-12 18:37:18,778 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 279 transitions. Word has length 73 [2022-07-12 18:37:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:18,780 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 279 transitions. [2022-07-12 18:37:18,781 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 18:37:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 279 transitions. [2022-07-12 18:37:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 18:37:18,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:18,785 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 18:37:18,805 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 18:37:18,995 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 18:37:18,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:18,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1752586491, now seen corresponding path program 1 times [2022-07-12 18:37:18,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:18,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513497417] [2022-07-12 18:37:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:18,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:19,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:19,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563970577] [2022-07-12 18:37:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:19,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:19,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:19,015 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 18:37:19,019 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 18:37:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:37:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:19,293 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:19,293 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 18:37:19,306 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 18:37:19,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:19,454 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:19,455 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 18:37:19,470 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 18:37:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513497417] [2022-07-12 18:37:19,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563970577] [2022-07-12 18:37:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563970577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:19,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-12 18:37:19,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235590228] [2022-07-12 18:37:19,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:37:19,473 INFO L87 Difference]: Start difference. First operand 247 states and 279 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 18:37:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:19,901 INFO L93 Difference]: Finished difference Result 393 states and 461 transitions. [2022-07-12 18:37:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:37:19,902 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 18:37:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:19,904 INFO L225 Difference]: With dead ends: 393 [2022-07-12 18:37:19,904 INFO L226 Difference]: Without dead ends: 393 [2022-07-12 18:37:19,904 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 18:37:19,904 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 222 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:19,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1721 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 915 Invalid, 0 Unknown, 273 Unchecked, 0.4s Time] [2022-07-12 18:37:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-12 18:37:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2022-07-12 18:37:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 145 states have (on average 1.7241379310344827) internal successors, (250), 228 states have internal predecessors, (250), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-12 18:37:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 277 transitions. [2022-07-12 18:37:19,912 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 277 transitions. Word has length 74 [2022-07-12 18:37:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 277 transitions. [2022-07-12 18:37:19,914 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 18:37:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 277 transitions. [2022-07-12 18:37:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:37:19,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:19,916 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 18:37:19,935 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 18:37:20,124 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 18:37:20,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1057141109, now seen corresponding path program 1 times [2022-07-12 18:37:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:20,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992636659] [2022-07-12 18:37:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:20,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:20,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469335666] [2022-07-12 18:37:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:20,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:20,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:20,142 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 18:37:20,143 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 18:37:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:37:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:20,376 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:20,377 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 18:37:20,439 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:20,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:37:20,452 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 18:37:20,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:20,702 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:20,702 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 18:37:20,712 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 18:37:20,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992636659] [2022-07-12 18:37:20,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469335666] [2022-07-12 18:37:20,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469335666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:20,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:20,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-12 18:37:20,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126419421] [2022-07-12 18:37:20,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:20,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:37:20,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:37:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:37:20,714 INFO L87 Difference]: Start difference. First operand 245 states and 277 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 18:37:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:29,219 INFO L93 Difference]: Finished difference Result 278 states and 318 transitions. [2022-07-12 18:37:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:29,220 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 18:37:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:29,221 INFO L225 Difference]: With dead ends: 278 [2022-07-12 18:37:29,221 INFO L226 Difference]: Without dead ends: 278 [2022-07-12 18:37:29,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:37:29,222 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 151 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:29,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1920 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 775 Invalid, 0 Unknown, 253 Unchecked, 0.3s Time] [2022-07-12 18:37:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-12 18:37:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 269. [2022-07-12 18:37:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 166 states have (on average 1.644578313253012) internal successors, (273), 248 states have internal predecessors, (273), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-07-12 18:37:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2022-07-12 18:37:29,231 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 75 [2022-07-12 18:37:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:29,232 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2022-07-12 18:37:29,232 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 18:37:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2022-07-12 18:37:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:37:29,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:29,234 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 18:37:29,253 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 18:37:29,441 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 18:37:29,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1057141108, now seen corresponding path program 1 times [2022-07-12 18:37:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:29,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292752909] [2022-07-12 18:37:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:29,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:29,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582916367] [2022-07-12 18:37:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:29,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:29,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:29,460 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 18:37:29,461 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 18:37:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 18:37:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:29,593 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 18:37:30,047 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:30,047 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 18:37:30,051 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 18:37:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:30,185 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 21 treesize of output 21 [2022-07-12 18:37:30,200 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:30,200 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 18:37:30,259 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 18:37:30,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:32,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292752909] [2022-07-12 18:37:32,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582916367] [2022-07-12 18:37:32,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582916367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:32,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:32,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-12 18:37:32,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117991311] [2022-07-12 18:37:32,384 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:32,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:37:32,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:32,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:37:32,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:37:32,385 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 18:37:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:33,561 INFO L93 Difference]: Finished difference Result 375 states and 435 transitions. [2022-07-12 18:37:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:37:33,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 18:37:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:33,562 INFO L225 Difference]: With dead ends: 375 [2022-07-12 18:37:33,563 INFO L226 Difference]: Without dead ends: 375 [2022-07-12 18:37:33,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:37:33,563 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 114 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1553 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:33,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1247 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1200 Invalid, 0 Unknown, 1553 Unchecked, 0.9s Time] [2022-07-12 18:37:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-12 18:37:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 274. [2022-07-12 18:37:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 170 states have (on average 1.6294117647058823) internal successors, (277), 251 states have internal predecessors, (277), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (20), 17 states have call predecessors, (20), 16 states have call successors, (20) [2022-07-12 18:37:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 313 transitions. [2022-07-12 18:37:33,570 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 313 transitions. Word has length 75 [2022-07-12 18:37:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:33,570 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 313 transitions. [2022-07-12 18:37:33,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 18:37:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 313 transitions. [2022-07-12 18:37:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:37:33,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:33,571 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 18:37:33,590 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 18:37:33,787 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 18:37:33,791 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1287213158, now seen corresponding path program 1 times [2022-07-12 18:37:33,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170171178] [2022-07-12 18:37:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:33,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:33,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:33,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910289984] [2022-07-12 18:37:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:33,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:33,818 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 18:37:33,820 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 18:37:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:37:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:34,064 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:34,065 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 18:37:34,127 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:34,127 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 18:37:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-12 18:37:34,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:34,379 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:34,379 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 18:37:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-12 18:37:34,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170171178] [2022-07-12 18:37:34,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910289984] [2022-07-12 18:37:34,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910289984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:34,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:34,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-12 18:37:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410194784] [2022-07-12 18:37:34,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:37:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:37:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:37:34,391 INFO L87 Difference]: Start difference. First operand 274 states and 313 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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 18:37:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:42,840 INFO L93 Difference]: Finished difference Result 297 states and 339 transitions. [2022-07-12 18:37:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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 76 [2022-07-12 18:37:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:42,842 INFO L225 Difference]: With dead ends: 297 [2022-07-12 18:37:42,842 INFO L226 Difference]: Without dead ends: 297 [2022-07-12 18:37:42,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:37:42,843 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 150 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:42,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1766 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 767 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-07-12 18:37:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-07-12 18:37:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 275. [2022-07-12 18:37:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 171 states have (on average 1.6257309941520468) internal successors, (278), 254 states have internal predecessors, (278), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-07-12 18:37:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 311 transitions. [2022-07-12 18:37:42,849 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 311 transitions. Word has length 76 [2022-07-12 18:37:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:42,849 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 311 transitions. [2022-07-12 18:37:42,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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 18:37:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 311 transitions. [2022-07-12 18:37:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:37:42,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:42,850 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 18:37:42,867 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 18:37:43,063 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 18:37:43,063 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1588364001, now seen corresponding path program 1 times [2022-07-12 18:37:43,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:43,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734511348] [2022-07-12 18:37:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:43,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:43,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:43,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370800662] [2022-07-12 18:37:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:43,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:43,084 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 18:37:43,085 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 18:37:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:43,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:37:43,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-12 18:37:43,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:43,265 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 18:37:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-12 18:37:43,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734511348] [2022-07-12 18:37:43,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370800662] [2022-07-12 18:37:43,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370800662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:43,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:43,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 18:37:43,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347520446] [2022-07-12 18:37:43,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:37:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:37:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:37:43,317 INFO L87 Difference]: Start difference. First operand 275 states and 311 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 18:37:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:43,551 INFO L93 Difference]: Finished difference Result 293 states and 336 transitions. [2022-07-12 18:37:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:37:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 76 [2022-07-12 18:37:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:43,561 INFO L225 Difference]: With dead ends: 293 [2022-07-12 18:37:43,562 INFO L226 Difference]: Without dead ends: 293 [2022-07-12 18:37:43,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 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 18:37:43,562 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 226 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:43,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1665 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:37:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-12 18:37:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 274. [2022-07-12 18:37:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 171 states have (on average 1.6198830409356726) internal successors, (277), 253 states have internal predecessors, (277), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-07-12 18:37:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 310 transitions. [2022-07-12 18:37:43,571 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 310 transitions. Word has length 76 [2022-07-12 18:37:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:43,571 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 310 transitions. [2022-07-12 18:37:43,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 18:37:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 310 transitions. [2022-07-12 18:37:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-12 18:37:43,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:43,572 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, 1, 1] [2022-07-12 18:37:43,589 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 18:37:43,787 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 18:37:43,787 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1704414370, now seen corresponding path program 1 times [2022-07-12 18:37:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:43,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182517867] [2022-07-12 18:37:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:43,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:43,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337745252] [2022-07-12 18:37:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:43,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:43,805 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 18:37:43,810 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 18:37:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:37:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-12 18:37:43,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182517867] [2022-07-12 18:37:43,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337745252] [2022-07-12 18:37:43,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337745252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:43,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:43,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:43,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629784946] [2022-07-12 18:37:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:43,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:37:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:37:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:37:43,954 INFO L87 Difference]: Start difference. First operand 274 states and 310 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 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 18:37:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:44,052 INFO L93 Difference]: Finished difference Result 281 states and 321 transitions. [2022-07-12 18:37:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:37:44,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 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 78 [2022-07-12 18:37:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:44,054 INFO L225 Difference]: With dead ends: 281 [2022-07-12 18:37:44,054 INFO L226 Difference]: Without dead ends: 281 [2022-07-12 18:37:44,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 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 18:37:44,054 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 98 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:44,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 361 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-07-12 18:37:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 273. [2022-07-12 18:37:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 171 states have (on average 1.6140350877192982) internal successors, (276), 252 states have internal predecessors, (276), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-07-12 18:37:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 309 transitions. [2022-07-12 18:37:44,060 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 309 transitions. Word has length 78 [2022-07-12 18:37:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:44,060 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 309 transitions. [2022-07-12 18:37:44,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 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 18:37:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 309 transitions. [2022-07-12 18:37:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:37:44,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:44,061 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, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:44,086 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 18:37:44,261 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 18:37:44,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:44,262 INFO L85 PathProgramCache]: Analyzing trace with hash -101250807, now seen corresponding path program 1 times [2022-07-12 18:37:44,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:44,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061293310] [2022-07-12 18:37:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:44,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:44,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:44,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245007370] [2022-07-12 18:37:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:44,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:44,279 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 18:37:44,280 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 18:37:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:37:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:44,523 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:44,524 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 18:37:44,582 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:44,582 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 18:37:44,649 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:44,650 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 18:37:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 18:37:44,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061293310] [2022-07-12 18:37:44,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245007370] [2022-07-12 18:37:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245007370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:44,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:44,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 18:37:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948679336] [2022-07-12 18:37:44,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:37:44,809 INFO L87 Difference]: Start difference. First operand 273 states and 309 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 18:37:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:45,328 INFO L93 Difference]: Finished difference Result 452 states and 532 transitions. [2022-07-12 18:37:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:37:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 82 [2022-07-12 18:37:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:45,330 INFO L225 Difference]: With dead ends: 452 [2022-07-12 18:37:45,330 INFO L226 Difference]: Without dead ends: 452 [2022-07-12 18:37:45,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 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 18:37:45,331 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 279 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:45,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2098 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1054 Invalid, 0 Unknown, 444 Unchecked, 0.4s Time] [2022-07-12 18:37:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-12 18:37:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 305. [2022-07-12 18:37:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 198 states have (on average 1.5505050505050506) internal successors, (307), 278 states have internal predecessors, (307), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (26), 20 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-12 18:37:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 353 transitions. [2022-07-12 18:37:45,339 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 353 transitions. Word has length 82 [2022-07-12 18:37:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:45,339 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 353 transitions. [2022-07-12 18:37:45,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 18:37:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 353 transitions. [2022-07-12 18:37:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:37:45,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:45,340 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, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:45,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:45,552 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 18:37:45,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash -101250806, now seen corresponding path program 1 times [2022-07-12 18:37:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:45,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818877257] [2022-07-12 18:37:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:45,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:45,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22260947] [2022-07-12 18:37:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:45,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:45,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:45,564 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 18:37:45,565 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 18:37:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:45,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 18:37:45,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:45,722 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 18:37:46,258 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:46,259 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 18:37:46,265 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 18:37:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:46,520 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 18:37:46,541 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:46,542 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 18:37:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:46,702 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 21 treesize of output 21 [2022-07-12 18:37:46,719 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:46,719 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 18:37:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 18:37:46,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:46,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:46,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818877257] [2022-07-12 18:37:46,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:46,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22260947] [2022-07-12 18:37:46,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22260947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:46,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:46,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-12 18:37:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134011277] [2022-07-12 18:37:46,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:37:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:37:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:37:46,993 INFO L87 Difference]: Start difference. First operand 305 states and 353 transitions. Second operand has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 18:37:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:48,582 INFO L93 Difference]: Finished difference Result 414 states and 484 transitions. [2022-07-12 18:37:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:37:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 82 [2022-07-12 18:37:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:48,584 INFO L225 Difference]: With dead ends: 414 [2022-07-12 18:37:48,584 INFO L226 Difference]: Without dead ends: 414 [2022-07-12 18:37:48,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:37:48,584 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 116 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1602 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:48,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1338 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1155 Invalid, 0 Unknown, 1602 Unchecked, 1.1s Time] [2022-07-12 18:37:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-12 18:37:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 312. [2022-07-12 18:37:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 205 states have (on average 1.5365853658536586) internal successors, (315), 285 states have internal predecessors, (315), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (26), 20 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-12 18:37:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 361 transitions. [2022-07-12 18:37:48,591 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 361 transitions. Word has length 82 [2022-07-12 18:37:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:48,591 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 361 transitions. [2022-07-12 18:37:48,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 18:37:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 361 transitions. [2022-07-12 18:37:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 18:37:48,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:48,592 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:48,611 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 18:37:48,805 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 18:37:48,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1156192312, now seen corresponding path program 1 times [2022-07-12 18:37:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225374430] [2022-07-12 18:37:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:48,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:48,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548095220] [2022-07-12 18:37:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:48,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:48,822 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 18:37:48,823 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 18:37:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:37:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-12 18:37:48,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:48,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225374430] [2022-07-12 18:37:48,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:48,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548095220] [2022-07-12 18:37:48,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548095220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:48,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:48,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:37:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075300527] [2022-07-12 18:37:48,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:48,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:37:48,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:37:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:37:48,980 INFO L87 Difference]: Start difference. First operand 312 states and 361 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 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 18:37:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:49,088 INFO L93 Difference]: Finished difference Result 325 states and 379 transitions. [2022-07-12 18:37:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:37:49,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 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 83 [2022-07-12 18:37:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:49,089 INFO L225 Difference]: With dead ends: 325 [2022-07-12 18:37:49,089 INFO L226 Difference]: Without dead ends: 325 [2022-07-12 18:37:49,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 18:37:49,090 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 165 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:49,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 537 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-12 18:37:49,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 311. [2022-07-12 18:37:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 205 states have (on average 1.5317073170731708) internal successors, (314), 284 states have internal predecessors, (314), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (26), 20 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-12 18:37:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 360 transitions. [2022-07-12 18:37:49,096 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 360 transitions. Word has length 83 [2022-07-12 18:37:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:49,096 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 360 transitions. [2022-07-12 18:37:49,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 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 18:37:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 360 transitions. [2022-07-12 18:37:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 18:37:49,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:49,097 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:49,116 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 18:37:49,304 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 18:37:49,305 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1156192313, now seen corresponding path program 1 times [2022-07-12 18:37:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:49,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104585493] [2022-07-12 18:37:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:49,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:49,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:49,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688325411] [2022-07-12 18:37:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:49,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:49,316 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 18:37:49,317 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 18:37:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:37:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:49,459 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 18:37:49,471 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 18:37:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:50,475 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 18:37:50,494 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:50,494 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 18:37:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:50,741 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 20 treesize of output 22 [2022-07-12 18:37:50,757 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:50,757 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 18:37:51,722 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 18:37:51,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:52,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104585493] [2022-07-12 18:37:52,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688325411] [2022-07-12 18:37:52,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688325411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:52,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:52,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 18:37:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312564995] [2022-07-12 18:37:52,029 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:52,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:37:52,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:37:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:37:52,030 INFO L87 Difference]: Start difference. First operand 311 states and 360 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 18:37:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:52,691 INFO L93 Difference]: Finished difference Result 515 states and 614 transitions. [2022-07-12 18:37:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 83 [2022-07-12 18:37:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:52,693 INFO L225 Difference]: With dead ends: 515 [2022-07-12 18:37:52,694 INFO L226 Difference]: Without dead ends: 515 [2022-07-12 18:37:52,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:37:52,694 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 172 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3305 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:52,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 2658 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 3305 Unchecked, 0.2s Time] [2022-07-12 18:37:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-12 18:37:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 354. [2022-07-12 18:37:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 242 states have (on average 1.475206611570248) internal successors, (357), 321 states have internal predecessors, (357), 24 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (41), 26 states have call predecessors, (41), 24 states have call successors, (41) [2022-07-12 18:37:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 422 transitions. [2022-07-12 18:37:52,702 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 422 transitions. Word has length 83 [2022-07-12 18:37:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:52,702 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 422 transitions. [2022-07-12 18:37:52,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 18:37:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 422 transitions. [2022-07-12 18:37:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 18:37:52,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:52,703 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:52,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 18:37:52,915 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 18:37:52,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:37:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 39396258, now seen corresponding path program 1 times [2022-07-12 18:37:52,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935056082] [2022-07-12 18:37:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:52,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:52,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157349115] [2022-07-12 18:37:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:52,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:52,937 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 18:37:52,938 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 18:37:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-12 18:37:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:53,120 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 18:37:53,134 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 18:38:01,426 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:01,427 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 18:38:01,925 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:01,925 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 18:38:11,576 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 49 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:38:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:15,248 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 18:38:15,330 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:38:15,330 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 18:38:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 18:38:18,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:19,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935056082] [2022-07-12 18:38:19,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157349115] [2022-07-12 18:38:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157349115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:19,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:19,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 18:38:19,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101344255] [2022-07-12 18:38:19,822 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:19,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:38:19,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:19,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:38:19,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:38:19,823 INFO L87 Difference]: Start difference. First operand 354 states and 422 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 18:38:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:20,230 INFO L93 Difference]: Finished difference Result 566 states and 707 transitions. [2022-07-12 18:38:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:38:20,231 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 84 [2022-07-12 18:38:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:20,233 INFO L225 Difference]: With dead ends: 566 [2022-07-12 18:38:20,233 INFO L226 Difference]: Without dead ends: 566 [2022-07-12 18:38:20,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:38:20,234 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 170 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2648 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3663 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:20,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2648 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 3663 Unchecked, 0.2s Time] [2022-07-12 18:38:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-07-12 18:38:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 361. [2022-07-12 18:38:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 248 states have (on average 1.471774193548387) internal successors, (365), 328 states have internal predecessors, (365), 24 states have call successors, (24), 6 states have call predecessors, (24), 10 states have return successors, (49), 26 states have call predecessors, (49), 24 states have call successors, (49) [2022-07-12 18:38:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 438 transitions. [2022-07-12 18:38:20,248 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 438 transitions. Word has length 84 [2022-07-12 18:38:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:20,248 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 438 transitions. [2022-07-12 18:38:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 18:38:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 438 transitions. [2022-07-12 18:38:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 18:38:20,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:20,249 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:20,267 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 18:38:20,459 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 18:38:20,459 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1872760596, now seen corresponding path program 2 times [2022-07-12 18:38:20,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:20,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631753098] [2022-07-12 18:38:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:20,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:20,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799121261] [2022-07-12 18:38:20,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:38:20,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:20,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:20,473 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 18:38:20,473 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 18:38:20,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:38:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 18:38:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:20,655 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 18:38:20,665 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 18:38:21,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:21,645 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 18:38:21,661 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:21,661 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 18:38:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:22,069 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 18:38:22,080 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:38:22,080 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 18:38:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 18:38:23,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:23,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631753098] [2022-07-12 18:38:23,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799121261] [2022-07-12 18:38:23,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799121261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:23,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:23,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-12 18:38:23,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34182837] [2022-07-12 18:38:23,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:23,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:38:23,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:38:23,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:38:23,425 INFO L87 Difference]: Start difference. First operand 361 states and 438 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 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 18:38:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:23,987 INFO L93 Difference]: Finished difference Result 532 states and 663 transitions. [2022-07-12 18:38:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:38:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 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 84 [2022-07-12 18:38:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:23,989 INFO L225 Difference]: With dead ends: 532 [2022-07-12 18:38:23,989 INFO L226 Difference]: Without dead ends: 532 [2022-07-12 18:38:23,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:38:23,990 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 114 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2449 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:23,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2045 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 227 Invalid, 0 Unknown, 2449 Unchecked, 0.2s Time] [2022-07-12 18:38:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-12 18:38:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 382. [2022-07-12 18:38:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 263 states have (on average 1.4486692015209126) internal successors, (381), 345 states have internal predecessors, (381), 28 states have call successors, (28), 6 states have call predecessors, (28), 12 states have return successors, (70), 30 states have call predecessors, (70), 28 states have call successors, (70) [2022-07-12 18:38:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 479 transitions. [2022-07-12 18:38:24,004 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 479 transitions. Word has length 84 [2022-07-12 18:38:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:24,004 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 479 transitions. [2022-07-12 18:38:24,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 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 18:38:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 479 transitions. [2022-07-12 18:38:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 18:38:24,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:24,005 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:24,027 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 18:38:24,219 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 18:38:24,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash -221543079, now seen corresponding path program 3 times [2022-07-12 18:38:24,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:24,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583413608] [2022-07-12 18:38:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:24,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:24,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090097198] [2022-07-12 18:38:24,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:38:24,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:24,237 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 18:38:24,238 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 18:38:24,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:38:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:38:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-12 18:38:24,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583413608] [2022-07-12 18:38:24,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090097198] [2022-07-12 18:38:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090097198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:24,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:24,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:38:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181998586] [2022-07-12 18:38:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:38:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:38:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:38:24,421 INFO L87 Difference]: Start difference. First operand 382 states and 479 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:24,472 INFO L93 Difference]: Finished difference Result 347 states and 407 transitions. [2022-07-12 18:38:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:38:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 85 [2022-07-12 18:38:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:24,476 INFO L225 Difference]: With dead ends: 347 [2022-07-12 18:38:24,476 INFO L226 Difference]: Without dead ends: 322 [2022-07-12 18:38:24,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:38:24,477 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 12 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 986 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:38:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-07-12 18:38:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 290. [2022-07-12 18:38:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 187 states have (on average 1.5668449197860963) internal successors, (293), 265 states have internal predecessors, (293), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 18:38:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 333 transitions. [2022-07-12 18:38:24,482 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 333 transitions. Word has length 85 [2022-07-12 18:38:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:24,482 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 333 transitions. [2022-07-12 18:38:24,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 333 transitions. [2022-07-12 18:38:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 18:38:24,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:24,483 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, 1] [2022-07-12 18:38:24,501 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 18:38:24,701 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 18:38:24,701 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:24,702 INFO L85 PathProgramCache]: Analyzing trace with hash 778945661, now seen corresponding path program 4 times [2022-07-12 18:38:24,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:24,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112657822] [2022-07-12 18:38:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:24,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:24,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:24,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478244573] [2022-07-12 18:38:24,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:38:24,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:24,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:24,717 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 18:38:24,719 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 18:38:24,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:38:24,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 18:38:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:24,924 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 6 treesize of output 5 [2022-07-12 18:38:24,927 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 18:38:24,937 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 18:38:32,805 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:32,805 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 18:38:32,888 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 23 treesize of output 25 [2022-07-12 18:38:36,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:36,242 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 18:38:36,331 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:38:36,332 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 18:38:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 102 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 18:38:39,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:40,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112657822] [2022-07-12 18:38:40,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478244573] [2022-07-12 18:38:40,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478244573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:40,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:40,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 18:38:40,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012690004] [2022-07-12 18:38:40,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:40,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:38:40,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:40,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:38:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:38:40,675 INFO L87 Difference]: Start difference. First operand 290 states and 333 transitions. Second operand has 24 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 18:38:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:45,831 INFO L93 Difference]: Finished difference Result 443 states and 531 transitions. [2022-07-12 18:38:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:38:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 89 [2022-07-12 18:38:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:45,833 INFO L225 Difference]: With dead ends: 443 [2022-07-12 18:38:45,833 INFO L226 Difference]: Without dead ends: 443 [2022-07-12 18:38:45,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:38:45,834 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 112 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2363 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:45,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1152 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 350 Invalid, 0 Unknown, 2363 Unchecked, 0.2s Time] [2022-07-12 18:38:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-12 18:38:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 333. [2022-07-12 18:38:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 224 states have (on average 1.5) internal successors, (336), 302 states have internal predecessors, (336), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (33), 26 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-12 18:38:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 393 transitions. [2022-07-12 18:38:45,848 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 393 transitions. Word has length 89 [2022-07-12 18:38:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:45,849 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 393 transitions. [2022-07-12 18:38:45,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 18:38:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 393 transitions. [2022-07-12 18:38:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 18:38:45,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:45,850 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 18:38:45,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-12 18:38:46,063 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 18:38:46,063 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1685299422, now seen corresponding path program 5 times [2022-07-12 18:38:46,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:46,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744813722] [2022-07-12 18:38:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:46,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:46,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:46,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974688507] [2022-07-12 18:38:46,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:38:46,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:46,077 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 18:38:46,094 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 18:38:46,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:38:46,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:38:46,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-12 18:38:46,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-12 18:38:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744813722] [2022-07-12 18:38:46,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974688507] [2022-07-12 18:38:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974688507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:46,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:46,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 18:38:46,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935245334] [2022-07-12 18:38:46,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:46,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:38:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:38:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:38:46,384 INFO L87 Difference]: Start difference. First operand 333 states and 393 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 18:38:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:46,581 INFO L93 Difference]: Finished difference Result 341 states and 391 transitions. [2022-07-12 18:38:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:38:46,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 90 [2022-07-12 18:38:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:46,583 INFO L225 Difference]: With dead ends: 341 [2022-07-12 18:38:46,583 INFO L226 Difference]: Without dead ends: 321 [2022-07-12 18:38:46,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:38:46,584 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 57 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:46,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1723 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-12 18:38:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2022-07-12 18:38:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 216 states have (on average 1.5185185185185186) internal successors, (328), 294 states have internal predecessors, (328), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 18:38:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 368 transitions. [2022-07-12 18:38:46,589 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 368 transitions. Word has length 90 [2022-07-12 18:38:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:46,589 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 368 transitions. [2022-07-12 18:38:46,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 18:38:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 368 transitions. [2022-07-12 18:38:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-12 18:38:46,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:46,590 INFO L195 NwaCegarLoop]: trace histogram [22, 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 18:38:46,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:46,808 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 18:38:46,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2069243993, now seen corresponding path program 6 times [2022-07-12 18:38:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835664060] [2022-07-12 18:38:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:46,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:46,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864432701] [2022-07-12 18:38:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:38:46,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:46,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:46,832 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 18:38:46,833 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 18:38:47,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 18:38:47,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:38:47,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:38:47,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-12 18:38:47,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-12 18:38:47,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:47,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835664060] [2022-07-12 18:38:47,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:47,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864432701] [2022-07-12 18:38:47,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864432701] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:47,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:47,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-12 18:38:47,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806230077] [2022-07-12 18:38:47,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:47,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:38:47,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:47,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:38:47,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:38:47,700 INFO L87 Difference]: Start difference. First operand 321 states and 368 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 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 18:38:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:47,991 INFO L93 Difference]: Finished difference Result 349 states and 400 transitions. [2022-07-12 18:38:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:38:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 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 105 [2022-07-12 18:38:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:47,994 INFO L225 Difference]: With dead ends: 349 [2022-07-12 18:38:47,994 INFO L226 Difference]: Without dead ends: 329 [2022-07-12 18:38:47,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:38:47,994 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 80 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:47,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1488 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-07-12 18:38:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-07-12 18:38:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 224 states have (on average 1.4821428571428572) internal successors, (332), 302 states have internal predecessors, (332), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 18:38:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 372 transitions. [2022-07-12 18:38:47,999 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 372 transitions. Word has length 105 [2022-07-12 18:38:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:47,999 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 372 transitions. [2022-07-12 18:38:47,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 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 18:38:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 372 transitions. [2022-07-12 18:38:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-12 18:38:48,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:48,000 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:38:48,006 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 18:38:48,206 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 18:38:48,206 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:48,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:48,207 INFO L85 PathProgramCache]: Analyzing trace with hash -928119015, now seen corresponding path program 7 times [2022-07-12 18:38:48,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:48,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916306428] [2022-07-12 18:38:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:48,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:48,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:48,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978149941] [2022-07-12 18:38:48,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:38:48,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:48,231 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 18:38:48,232 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 18:38:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:49,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-12 18:38:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:49,271 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 18:38:49,534 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:49,535 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 18:38:49,556 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:49,556 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 18:38:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:49,678 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 18:38:49,686 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:38:49,686 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 18:38:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-12 18:38:49,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:54,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:54,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916306428] [2022-07-12 18:38:54,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:54,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978149941] [2022-07-12 18:38:54,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978149941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:54,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:54,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 18:38:54,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691120611] [2022-07-12 18:38:54,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:54,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:38:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:38:54,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:38:54,474 INFO L87 Difference]: Start difference. First operand 329 states and 372 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 18:38:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:55,595 INFO L93 Difference]: Finished difference Result 574 states and 672 transitions. [2022-07-12 18:38:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:38:55,596 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 109 [2022-07-12 18:38:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:55,597 INFO L225 Difference]: With dead ends: 574 [2022-07-12 18:38:55,597 INFO L226 Difference]: Without dead ends: 574 [2022-07-12 18:38:55,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:38:55,598 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 290 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:55,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 890 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2308 Invalid, 0 Unknown, 884 Unchecked, 1.0s Time] [2022-07-12 18:38:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-07-12 18:38:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 337. [2022-07-12 18:38:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 232 states have (on average 1.478448275862069) internal successors, (343), 310 states have internal predecessors, (343), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 18:38:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 383 transitions. [2022-07-12 18:38:55,604 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 383 transitions. Word has length 109 [2022-07-12 18:38:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:55,604 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 383 transitions. [2022-07-12 18:38:55,604 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 18:38:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 383 transitions. [2022-07-12 18:38:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-12 18:38:55,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:55,605 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:38:55,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 18:38:55,823 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 18:38:55,824 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1430824346, now seen corresponding path program 1 times [2022-07-12 18:38:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:55,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46076655] [2022-07-12 18:38:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:55,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:55,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:55,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121794298] [2022-07-12 18:38:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:55,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:55,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:55,849 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 18:38:55,850 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 18:38:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:56,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:38:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:56,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:56,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46076655] [2022-07-12 18:38:56,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121794298] [2022-07-12 18:38:56,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121794298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:56,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:56,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:38:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562652716] [2022-07-12 18:38:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:38:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:38:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:56,125 INFO L87 Difference]: Start difference. First operand 337 states and 383 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 18:38:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:56,238 INFO L93 Difference]: Finished difference Result 342 states and 391 transitions. [2022-07-12 18:38:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:38:56,238 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 111 [2022-07-12 18:38:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:56,239 INFO L225 Difference]: With dead ends: 342 [2022-07-12 18:38:56,239 INFO L226 Difference]: Without dead ends: 342 [2022-07-12 18:38:56,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 18:38:56,240 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 84 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:56,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 366 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-12 18:38:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2022-07-12 18:38:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 232 states have (on average 1.4741379310344827) internal successors, (342), 309 states have internal predecessors, (342), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 18:38:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 382 transitions. [2022-07-12 18:38:56,245 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 382 transitions. Word has length 111 [2022-07-12 18:38:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:56,245 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 382 transitions. [2022-07-12 18:38:56,245 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 18:38:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 382 transitions. [2022-07-12 18:38:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-12 18:38:56,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:56,246 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:38:56,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:56,463 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 18:38:56,464 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:38:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1897038975, now seen corresponding path program 1 times [2022-07-12 18:38:56,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:56,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601806975] [2022-07-12 18:38:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:56,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:56,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149891932] [2022-07-12 18:38:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:56,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:56,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:56,484 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 18:38:56,485 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 18:38:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 18:38:56,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:56,861 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:56,861 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 18:38:56,918 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:56,918 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 18:38:57,039 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:57,040 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 18:38:57,161 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:57,161 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 18:38:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-12 18:38:57,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:57,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:57,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601806975] [2022-07-12 18:38:57,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149891932] [2022-07-12 18:38:57,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149891932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:57,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:57,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-12 18:38:57,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905322551] [2022-07-12 18:38:57,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:57,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:38:57,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:38:57,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:38:57,764 INFO L87 Difference]: Start difference. First operand 336 states and 382 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 18:39:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:02,325 INFO L93 Difference]: Finished difference Result 487 states and 556 transitions. [2022-07-12 18:39:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:39:02,325 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 115 [2022-07-12 18:39:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:02,326 INFO L225 Difference]: With dead ends: 487 [2022-07-12 18:39:02,326 INFO L226 Difference]: Without dead ends: 487 [2022-07-12 18:39:02,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 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 18:39:02,327 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 258 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2780 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:02,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2780 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 844 Invalid, 0 Unknown, 510 Unchecked, 0.3s Time] [2022-07-12 18:39:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-07-12 18:39:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 477. [2022-07-12 18:39:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 358 states have (on average 1.3631284916201116) internal successors, (488), 434 states have internal predecessors, (488), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-12 18:39:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 550 transitions. [2022-07-12 18:39:02,333 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 550 transitions. Word has length 115 [2022-07-12 18:39:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:02,334 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 550 transitions. [2022-07-12 18:39:02,334 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 18:39:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 550 transitions. [2022-07-12 18:39:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-12 18:39:02,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:02,335 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:39:02,370 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 18:39:02,553 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 18:39:02,553 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:02,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1897038974, now seen corresponding path program 1 times [2022-07-12 18:39:02,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:02,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821577196] [2022-07-12 18:39:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:02,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:02,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:02,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437705362] [2022-07-12 18:39:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:02,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:02,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:02,583 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 18:39:02,584 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 18:39:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 178 conjunts are in the unsatisfiable core [2022-07-12 18:39:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:03,701 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 18:39:03,715 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 18:39:04,961 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:04,961 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 18:39:04,997 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:04,998 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 18:39:05,627 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:05,627 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 18:39:05,633 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 18:39:06,312 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:06,312 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 18:39:06,356 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-07-12 18:39:06,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-07-12 18:39:06,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 15 treesize of output 11 [2022-07-12 18:39:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:39:06,734 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 29 treesize of output 29 [2022-07-12 18:39:06,749 INFO L356 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2022-07-12 18:39:06,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 25 [2022-07-12 18:39:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 120 proven. 445 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 18:39:07,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:07,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:07,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821577196] [2022-07-12 18:39:07,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:07,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437705362] [2022-07-12 18:39:07,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437705362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:39:07,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:39:07,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-07-12 18:39:07,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646230960] [2022-07-12 18:39:07,445 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 18:39:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 18:39:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1920, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:39:07,446 INFO L87 Difference]: Start difference. First operand 477 states and 550 transitions. Second operand has 43 states, 40 states have (on average 2.3) internal successors, (92), 37 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:39:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:11,846 INFO L93 Difference]: Finished difference Result 668 states and 782 transitions. [2022-07-12 18:39:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:39:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.3) internal successors, (92), 37 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2022-07-12 18:39:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:11,848 INFO L225 Difference]: With dead ends: 668 [2022-07-12 18:39:11,848 INFO L226 Difference]: Without dead ends: 668 [2022-07-12 18:39:11,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=222, Invalid=2640, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 18:39:11,849 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 188 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 6830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4188 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:11,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 2066 Invalid, 6830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2619 Invalid, 0 Unknown, 4188 Unchecked, 2.9s Time] [2022-07-12 18:39:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-12 18:39:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 487. [2022-07-12 18:39:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 368 states have (on average 1.361413043478261) internal successors, (501), 444 states have internal predecessors, (501), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-12 18:39:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 563 transitions. [2022-07-12 18:39:11,861 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 563 transitions. Word has length 115 [2022-07-12 18:39:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:11,862 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 563 transitions. [2022-07-12 18:39:11,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.3) internal successors, (92), 37 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:39:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 563 transitions. [2022-07-12 18:39:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 18:39:11,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:11,863 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:39:11,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:12,079 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 18:39:12,079 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1321333974, now seen corresponding path program 1 times [2022-07-12 18:39:12,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:12,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264655463] [2022-07-12 18:39:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:12,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:12,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:12,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740443990] [2022-07-12 18:39:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:12,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:12,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:12,101 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 18:39:12,131 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 18:39:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:39:12,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:12,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:12,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:12,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264655463] [2022-07-12 18:39:12,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:12,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740443990] [2022-07-12 18:39:12,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740443990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:12,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:12,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:39:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212391281] [2022-07-12 18:39:12,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:12,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:39:12,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:39:12,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:39:12,419 INFO L87 Difference]: Start difference. First operand 487 states and 563 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 18:39:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:12,532 INFO L93 Difference]: Finished difference Result 495 states and 573 transitions. [2022-07-12 18:39:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:39:12,532 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 116 [2022-07-12 18:39:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:12,533 INFO L225 Difference]: With dead ends: 495 [2022-07-12 18:39:12,533 INFO L226 Difference]: Without dead ends: 495 [2022-07-12 18:39:12,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 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 18:39:12,534 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 138 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:12,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 534 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:39:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-12 18:39:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 486. [2022-07-12 18:39:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 368 states have (on average 1.3559782608695652) internal successors, (499), 443 states have internal predecessors, (499), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-12 18:39:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 561 transitions. [2022-07-12 18:39:12,540 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 561 transitions. Word has length 116 [2022-07-12 18:39:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:12,540 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 561 transitions. [2022-07-12 18:39:12,540 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 18:39:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 561 transitions. [2022-07-12 18:39:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 18:39:12,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:12,541 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:39:12,561 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 18:39:12,756 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 18:39:12,757 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1321333975, now seen corresponding path program 1 times [2022-07-12 18:39:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:12,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218415136] [2022-07-12 18:39:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:12,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:12,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:12,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651519005] [2022-07-12 18:39:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:12,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:12,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:12,787 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 18:39:12,788 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 18:39:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:39:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:39:13,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:13,294 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:39:13,294 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 18:39:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:39:13,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:13,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218415136] [2022-07-12 18:39:13,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:13,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651519005] [2022-07-12 18:39:13,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651519005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:39:13,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:39:13,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-12 18:39:13,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185222821] [2022-07-12 18:39:13,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:13,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:39:13,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:39:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:39:13,508 INFO L87 Difference]: Start difference. First operand 486 states and 561 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 18:39:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:13,844 INFO L93 Difference]: Finished difference Result 494 states and 571 transitions. [2022-07-12 18:39:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:39:13,845 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 116 [2022-07-12 18:39:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:13,846 INFO L225 Difference]: With dead ends: 494 [2022-07-12 18:39:13,846 INFO L226 Difference]: Without dead ends: 494 [2022-07-12 18:39:13,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:39:13,846 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 195 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2623 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:13,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 2623 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:39:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-07-12 18:39:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 485. [2022-07-12 18:39:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 368 states have (on average 1.3505434782608696) internal successors, (497), 442 states have internal predecessors, (497), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-12 18:39:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 559 transitions. [2022-07-12 18:39:13,852 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 559 transitions. Word has length 116 [2022-07-12 18:39:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:13,852 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 559 transitions. [2022-07-12 18:39:13,852 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 18:39:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 559 transitions. [2022-07-12 18:39:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-12 18:39:13,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:13,853 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:39:13,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-12 18:39:14,062 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 18:39:14,062 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1991861505, now seen corresponding path program 1 times [2022-07-12 18:39:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:14,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870075545] [2022-07-12 18:39:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:14,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:14,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:14,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720078976] [2022-07-12 18:39:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:14,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:14,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:14,085 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 18:39:14,086 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 18:39:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:14,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 18:39:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:14,544 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:14,544 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 18:39:14,633 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:39:14,633 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 18:39:14,799 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-12 18:39:14,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-07-12 18:39:14,915 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-12 18:39:14,916 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 3 case distinctions, treesize of input 31 treesize of output 52 [2022-07-12 18:39:15,176 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-12 18:39:15,176 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 3 case distinctions, treesize of input 43 treesize of output 64 [2022-07-12 18:39:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 498 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-12 18:39:15,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:15,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870075545] [2022-07-12 18:39:15,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720078976] [2022-07-12 18:39:15,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720078976] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:39:15,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:39:15,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-12 18:39:15,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473313145] [2022-07-12 18:39:15,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:15,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:39:15,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:39:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:39:15,588 INFO L87 Difference]: Start difference. First operand 485 states and 559 transitions. Second operand has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:39:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:20,062 INFO L93 Difference]: Finished difference Result 795 states and 926 transitions. [2022-07-12 18:39:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:39:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2022-07-12 18:39:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:20,064 INFO L225 Difference]: With dead ends: 795 [2022-07-12 18:39:20,064 INFO L226 Difference]: Without dead ends: 795 [2022-07-12 18:39:20,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=174, Invalid=1230, Unknown=2, NotChecked=0, Total=1406 [2022-07-12 18:39:20,065 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 128 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:20,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 3371 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 578 Invalid, 0 Unknown, 642 Unchecked, 0.2s Time] [2022-07-12 18:39:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-07-12 18:39:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 789. [2022-07-12 18:39:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 639 states have (on average 1.2754303599374022) internal successors, (815), 713 states have internal predecessors, (815), 54 states have call successors, (54), 21 states have call predecessors, (54), 21 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-07-12 18:39:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 923 transitions. [2022-07-12 18:39:20,073 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 923 transitions. Word has length 122 [2022-07-12 18:39:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:20,073 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 923 transitions. [2022-07-12 18:39:20,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:39:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 923 transitions. [2022-07-12 18:39:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-12 18:39:20,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:20,074 INFO L195 NwaCegarLoop]: trace histogram [26, 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 18:39:20,095 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 18:39:20,291 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 18:39:20,291 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1991861504, now seen corresponding path program 1 times [2022-07-12 18:39:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42118777] [2022-07-12 18:39:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:20,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:20,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868059159] [2022-07-12 18:39:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:20,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:20,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:20,319 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 18:39:20,321 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 18:39:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 163 conjunts are in the unsatisfiable core [2022-07-12 18:39:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:21,242 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 18:39:21,267 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 18:39:22,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:39:22,132 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 18:39:22,156 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:22,157 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 18:39:22,618 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:39:22,618 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 18:39:22,627 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 18:39:23,505 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-12 18:39:23,506 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 18:39:23,519 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 18:39:28,176 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:28,176 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 18:39:28,242 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-07-12 18:39:28,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2022-07-12 18:39:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:39:28,517 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 18:39:28,549 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-07-12 18:39:28,550 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 18:39:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 101 proven. 438 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-12 18:39:28,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:29,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42118777] [2022-07-12 18:39:29,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868059159] [2022-07-12 18:39:29,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868059159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:39:29,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:39:29,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-07-12 18:39:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776251333] [2022-07-12 18:39:29,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:29,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 18:39:29,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 18:39:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1384, Unknown=2, NotChecked=0, Total=1560 [2022-07-12 18:39:29,171 INFO L87 Difference]: Start difference. First operand 789 states and 923 transitions. Second operand has 38 states, 35 states have (on average 2.6) internal successors, (91), 33 states have internal predecessors, (91), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:39:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:32,552 INFO L93 Difference]: Finished difference Result 925 states and 1083 transitions. [2022-07-12 18:39:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:39:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.6) internal successors, (91), 33 states have internal predecessors, (91), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2022-07-12 18:39:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:32,555 INFO L225 Difference]: With dead ends: 925 [2022-07-12 18:39:32,555 INFO L226 Difference]: Without dead ends: 925 [2022-07-12 18:39:32,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=246, Invalid=2008, Unknown=2, NotChecked=0, Total=2256 [2022-07-12 18:39:32,556 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 118 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2510 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:32,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1567 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1102 Invalid, 0 Unknown, 2510 Unchecked, 2.3s Time] [2022-07-12 18:39:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-07-12 18:39:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 808. [2022-07-12 18:39:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 656 states have (on average 1.271341463414634) internal successors, (834), 731 states have internal predecessors, (834), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-12 18:39:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 944 transitions. [2022-07-12 18:39:32,565 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 944 transitions. Word has length 122 [2022-07-12 18:39:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:32,565 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 944 transitions. [2022-07-12 18:39:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.6) internal successors, (91), 33 states have internal predecessors, (91), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:39:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 944 transitions. [2022-07-12 18:39:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 18:39:32,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:32,566 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1] [2022-07-12 18:39:32,589 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 18:39:32,779 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 18:39:32,779 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:32,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1618164434, now seen corresponding path program 1 times [2022-07-12 18:39:32,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:32,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773259631] [2022-07-12 18:39:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:32,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:32,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:32,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671345150] [2022-07-12 18:39:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:32,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:32,805 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 18:39:32,806 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 18:39:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:39:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:33,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:33,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773259631] [2022-07-12 18:39:33,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671345150] [2022-07-12 18:39:33,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671345150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:33,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:33,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:39:33,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167957716] [2022-07-12 18:39:33,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:33,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:39:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:39:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:39:33,174 INFO L87 Difference]: Start difference. First operand 808 states and 944 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 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 18:39:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:33,300 INFO L93 Difference]: Finished difference Result 811 states and 948 transitions. [2022-07-12 18:39:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:39:33,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 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 123 [2022-07-12 18:39:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:33,302 INFO L225 Difference]: With dead ends: 811 [2022-07-12 18:39:33,302 INFO L226 Difference]: Without dead ends: 811 [2022-07-12 18:39:33,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 18:39:33,303 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 112 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:33,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 531 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:39:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-07-12 18:39:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 807. [2022-07-12 18:39:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 656 states have (on average 1.2698170731707317) internal successors, (833), 730 states have internal predecessors, (833), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-12 18:39:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 943 transitions. [2022-07-12 18:39:33,311 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 943 transitions. Word has length 123 [2022-07-12 18:39:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:33,311 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 943 transitions. [2022-07-12 18:39:33,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 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 18:39:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 943 transitions. [2022-07-12 18:39:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 18:39:33,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:33,312 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1] [2022-07-12 18:39:33,333 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 18:39:33,527 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 18:39:33,527 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1618164433, now seen corresponding path program 1 times [2022-07-12 18:39:33,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:33,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107862231] [2022-07-12 18:39:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:33,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:33,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:33,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40966238] [2022-07-12 18:39:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:33,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:33,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:33,551 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 18:39:33,555 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 18:39:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-12 18:39:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:34,599 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 18:39:34,840 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:34,840 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 18:39:34,857 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:34,857 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 18:39:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:39:34,967 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 18:39:34,977 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:34,977 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 18:39:35,129 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:35,130 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 18:39:35,143 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:35,143 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 18:39:35,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:39:35,280 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:35,280 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 18:39:35,286 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:39:35,286 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 15 treesize of output 19 [2022-07-12 18:39:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 360 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-12 18:39:35,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:35,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:35,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107862231] [2022-07-12 18:39:35,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:35,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40966238] [2022-07-12 18:39:35,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40966238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:39:35,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:39:35,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-12 18:39:35,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925231298] [2022-07-12 18:39:35,781 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:35,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:39:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:39:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:39:35,782 INFO L87 Difference]: Start difference. First operand 807 states and 943 transitions. Second operand has 25 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 20 states have internal predecessors, (91), 3 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:39:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:37,313 INFO L93 Difference]: Finished difference Result 1026 states and 1216 transitions. [2022-07-12 18:39:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:39:37,314 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 20 states have internal predecessors, (91), 3 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 123 [2022-07-12 18:39:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:37,316 INFO L225 Difference]: With dead ends: 1026 [2022-07-12 18:39:37,316 INFO L226 Difference]: Without dead ends: 1026 [2022-07-12 18:39:37,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:39:37,321 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 325 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 4623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1712 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:37,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1194 Invalid, 4623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2826 Invalid, 0 Unknown, 1712 Unchecked, 1.3s Time] [2022-07-12 18:39:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-07-12 18:39:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 812. [2022-07-12 18:39:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 661 states have (on average 1.2723146747352496) internal successors, (841), 735 states have internal predecessors, (841), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-12 18:39:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 951 transitions. [2022-07-12 18:39:37,331 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 951 transitions. Word has length 123 [2022-07-12 18:39:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:37,332 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 951 transitions. [2022-07-12 18:39:37,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 20 states have internal predecessors, (91), 3 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:39:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 951 transitions. [2022-07-12 18:39:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 18:39:37,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:37,336 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1] [2022-07-12 18:39:37,366 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 18:39:37,559 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 18:39:37,559 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -277857361, now seen corresponding path program 1 times [2022-07-12 18:39:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839866512] [2022-07-12 18:39:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:37,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475965948] [2022-07-12 18:39:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:37,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:37,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:37,583 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 18:39:37,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 18:39:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:39:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:37,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:37,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839866512] [2022-07-12 18:39:37,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475965948] [2022-07-12 18:39:37,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475965948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:37,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:37,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:39:37,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261669573] [2022-07-12 18:39:37,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:37,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:39:37,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:37,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:39:37,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:39:37,970 INFO L87 Difference]: Start difference. First operand 812 states and 951 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:39:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:38,064 INFO L93 Difference]: Finished difference Result 813 states and 953 transitions. [2022-07-12 18:39:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:39:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:39:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:38,066 INFO L225 Difference]: With dead ends: 813 [2022-07-12 18:39:38,066 INFO L226 Difference]: Without dead ends: 813 [2022-07-12 18:39:38,067 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 18:39:38,068 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 25 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:38,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 408 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:39:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-07-12 18:39:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 811. [2022-07-12 18:39:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 661 states have (on average 1.2708018154311649) internal successors, (840), 734 states have internal predecessors, (840), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-12 18:39:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 950 transitions. [2022-07-12 18:39:38,079 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 950 transitions. Word has length 125 [2022-07-12 18:39:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:38,080 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 950 transitions. [2022-07-12 18:39:38,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:39:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 950 transitions. [2022-07-12 18:39:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 18:39:38,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:38,080 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1] [2022-07-12 18:39:38,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:38,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:38,297 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:38,297 INFO L85 PathProgramCache]: Analyzing trace with hash -277857360, now seen corresponding path program 1 times [2022-07-12 18:39:38,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:38,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794257819] [2022-07-12 18:39:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:38,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:38,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:38,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100925484] [2022-07-12 18:39:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:38,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:38,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:38,324 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:38,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 18:39:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:39:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:38,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:38,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:38,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794257819] [2022-07-12 18:39:38,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:38,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100925484] [2022-07-12 18:39:38,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100925484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:38,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:38,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:39:38,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13057646] [2022-07-12 18:39:38,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:38,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:39:38,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:39:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:39:38,744 INFO L87 Difference]: Start difference. First operand 811 states and 950 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:39:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:38,923 INFO L93 Difference]: Finished difference Result 812 states and 952 transitions. [2022-07-12 18:39:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:39:38,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:39:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:38,927 INFO L225 Difference]: With dead ends: 812 [2022-07-12 18:39:38,927 INFO L226 Difference]: Without dead ends: 812 [2022-07-12 18:39:38,927 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 18:39:38,928 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 54 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:38,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 378 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:39:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-07-12 18:39:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 810. [2022-07-12 18:39:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 661 states have (on average 1.2692889561270801) internal successors, (839), 733 states have internal predecessors, (839), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-12 18:39:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 949 transitions. [2022-07-12 18:39:38,936 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 949 transitions. Word has length 125 [2022-07-12 18:39:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:38,936 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 949 transitions. [2022-07-12 18:39:38,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:39:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 949 transitions. [2022-07-12 18:39:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 18:39:38,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:38,937 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:38,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-12 18:39:39,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:39,151 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash 10797464, now seen corresponding path program 1 times [2022-07-12 18:39:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:39,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676321092] [2022-07-12 18:39:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:39,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:39,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:39,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621126101] [2022-07-12 18:39:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:39,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:39,204 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 18:39:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:39,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-12 18:39:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:39,776 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:39,776 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 18:39:39,790 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:39:39,791 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 18:39:39,948 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:39,949 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 18:39:39,976 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:39:39,976 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 18:39:40,205 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:40,205 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 18:39:40,235 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-12 18:39:40,235 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 18:39:40,459 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:40,459 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 18:39:40,485 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-12 18:39:40,486 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 18:39:40,871 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:40,871 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 18:39:40,948 INFO L356 Elim1Store]: treesize reduction 40, result has 68.0 percent of original size [2022-07-12 18:39:40,948 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 18:39:44,700 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:39:44,700 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 19 treesize of output 25 [2022-07-12 18:39:44,785 INFO L356 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2022-07-12 18:39:44,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 165 [2022-07-12 18:39:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 32 proven. 466 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-12 18:39:45,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:45,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676321092] [2022-07-12 18:39:45,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621126101] [2022-07-12 18:39:45,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621126101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:39:45,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:39:45,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-07-12 18:39:45,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575308843] [2022-07-12 18:39:45,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 18:39:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 18:39:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:39:45,783 INFO L87 Difference]: Start difference. First operand 810 states and 949 transitions. Second operand has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 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 18:39:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:46,065 INFO L93 Difference]: Finished difference Result 931 states and 1084 transitions. [2022-07-12 18:39:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:39:46,065 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 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 129 [2022-07-12 18:39:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:46,068 INFO L225 Difference]: With dead ends: 931 [2022-07-12 18:39:46,068 INFO L226 Difference]: Without dead ends: 931 [2022-07-12 18:39:46,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:39:46,069 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 31 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2605 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:46,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2461 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 2605 Unchecked, 0.2s Time] [2022-07-12 18:39:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-07-12 18:39:46,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 924. [2022-07-12 18:39:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 764 states have (on average 1.2460732984293195) internal successors, (952), 836 states have internal predecessors, (952), 61 states have call successors, (61), 27 states have call predecessors, (61), 27 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2022-07-12 18:39:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1074 transitions. [2022-07-12 18:39:46,078 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1074 transitions. Word has length 129 [2022-07-12 18:39:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:46,079 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1074 transitions. [2022-07-12 18:39:46,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 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 18:39:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1074 transitions. [2022-07-12 18:39:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 18:39:46,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:46,084 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:46,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 18:39:46,307 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash 10797463, now seen corresponding path program 1 times [2022-07-12 18:39:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:46,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336304579] [2022-07-12 18:39:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:46,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:46,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022415733] [2022-07-12 18:39:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:46,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:46,332 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:46,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 18:39:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:46,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:39:46,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:46,820 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:46,821 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 18:39:46,874 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:46,874 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 18:39:46,939 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:46,939 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 18:39:46,989 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:46,989 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 18:39:47,037 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:47,038 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 18:39:47,089 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:47,089 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 18:39:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:47,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:47,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:47,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336304579] [2022-07-12 18:39:47,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:47,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022415733] [2022-07-12 18:39:47,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022415733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:47,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:47,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:39:47,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975408106] [2022-07-12 18:39:47,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:47,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:39:47,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:47,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:39:47,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:39:47,155 INFO L87 Difference]: Start difference. First operand 924 states and 1074 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 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 18:39:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:47,449 INFO L93 Difference]: Finished difference Result 1414 states and 1707 transitions. [2022-07-12 18:39:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:39:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 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 129 [2022-07-12 18:39:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:47,452 INFO L225 Difference]: With dead ends: 1414 [2022-07-12 18:39:47,453 INFO L226 Difference]: Without dead ends: 1414 [2022-07-12 18:39:47,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:39:47,453 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 171 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:47,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1012 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 421 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2022-07-12 18:39:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-07-12 18:39:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1253. [2022-07-12 18:39:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1050 states have (on average 1.2571428571428571) internal successors, (1320), 1123 states have internal predecessors, (1320), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2022-07-12 18:39:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1526 transitions. [2022-07-12 18:39:47,467 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1526 transitions. Word has length 129 [2022-07-12 18:39:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:47,467 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1526 transitions. [2022-07-12 18:39:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 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 18:39:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1526 transitions. [2022-07-12 18:39:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 18:39:47,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:47,469 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:47,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:47,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-12 18:39:47,691 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash 334721452, now seen corresponding path program 1 times [2022-07-12 18:39:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:47,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556852709] [2022-07-12 18:39:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:47,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:47,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:47,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596486988] [2022-07-12 18:39:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:47,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:47,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:47,716 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:47,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 18:39:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:48,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:39:48,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:48,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:48,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556852709] [2022-07-12 18:39:48,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596486988] [2022-07-12 18:39:48,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596486988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:48,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:48,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:39:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609993378] [2022-07-12 18:39:48,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:48,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:39:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:39:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:39:48,208 INFO L87 Difference]: Start difference. First operand 1253 states and 1526 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 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 18:39:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:48,311 INFO L93 Difference]: Finished difference Result 1252 states and 1524 transitions. [2022-07-12 18:39:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:39:48,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 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 130 [2022-07-12 18:39:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:48,314 INFO L225 Difference]: With dead ends: 1252 [2022-07-12 18:39:48,314 INFO L226 Difference]: Without dead ends: 1252 [2022-07-12 18:39:48,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 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 18:39:48,315 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 85 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:48,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 532 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:39:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-07-12 18:39:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1252. [2022-07-12 18:39:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1050 states have (on average 1.2552380952380953) internal successors, (1318), 1122 states have internal predecessors, (1318), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2022-07-12 18:39:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1524 transitions. [2022-07-12 18:39:48,326 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1524 transitions. Word has length 130 [2022-07-12 18:39:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:48,327 INFO L495 AbstractCegarLoop]: Abstraction has 1252 states and 1524 transitions. [2022-07-12 18:39:48,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 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 18:39:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1524 transitions. [2022-07-12 18:39:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 18:39:48,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:48,328 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:48,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:48,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-12 18:39:48,543 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:48,544 INFO L85 PathProgramCache]: Analyzing trace with hash 334721453, now seen corresponding path program 1 times [2022-07-12 18:39:48,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:48,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945228893] [2022-07-12 18:39:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:48,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:48,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:48,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433892998] [2022-07-12 18:39:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:48,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:48,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:48,569 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:48,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 18:39:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:49,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:39:49,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:39:49,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:49,355 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:39:49,355 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 18:39:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:39:49,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945228893] [2022-07-12 18:39:49,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433892998] [2022-07-12 18:39:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433892998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:39:49,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:39:49,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-12 18:39:49,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135706875] [2022-07-12 18:39:49,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:49,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:39:49,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:39:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:39:49,679 INFO L87 Difference]: Start difference. First operand 1252 states and 1524 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 18:39:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:49,975 INFO L93 Difference]: Finished difference Result 1251 states and 1522 transitions. [2022-07-12 18:39:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:39:49,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2022-07-12 18:39:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:49,979 INFO L225 Difference]: With dead ends: 1251 [2022-07-12 18:39:49,979 INFO L226 Difference]: Without dead ends: 1251 [2022-07-12 18:39:49,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 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 18:39:49,980 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 336 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:49,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 2316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:39:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-07-12 18:39:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1251. [2022-07-12 18:39:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1050 states have (on average 1.2533333333333334) internal successors, (1316), 1121 states have internal predecessors, (1316), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2022-07-12 18:39:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1522 transitions. [2022-07-12 18:39:49,993 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1522 transitions. Word has length 130 [2022-07-12 18:39:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:49,994 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1522 transitions. [2022-07-12 18:39:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 18:39:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1522 transitions. [2022-07-12 18:39:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-12 18:39:49,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:49,995 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:50,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:50,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:50,196 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash -455228562, now seen corresponding path program 1 times [2022-07-12 18:39:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:50,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390765601] [2022-07-12 18:39:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:50,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:50,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:50,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383224582] [2022-07-12 18:39:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:50,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:50,223 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:50,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 18:39:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:50,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:39:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:50,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390765601] [2022-07-12 18:39:50,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383224582] [2022-07-12 18:39:50,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383224582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:50,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:50,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:39:50,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562132269] [2022-07-12 18:39:50,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:50,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:39:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:39:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:39:50,689 INFO L87 Difference]: Start difference. First operand 1251 states and 1522 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 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 18:39:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:50,846 INFO L93 Difference]: Finished difference Result 1250 states and 1520 transitions. [2022-07-12 18:39:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:39:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 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 132 [2022-07-12 18:39:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:50,850 INFO L225 Difference]: With dead ends: 1250 [2022-07-12 18:39:50,850 INFO L226 Difference]: Without dead ends: 1250 [2022-07-12 18:39:50,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 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 18:39:50,850 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:50,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 384 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:39:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-07-12 18:39:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2022-07-12 18:39:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1050 states have (on average 1.2514285714285713) internal successors, (1314), 1120 states have internal predecessors, (1314), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2022-07-12 18:39:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1520 transitions. [2022-07-12 18:39:50,861 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1520 transitions. Word has length 132 [2022-07-12 18:39:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:50,862 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1520 transitions. [2022-07-12 18:39:50,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 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 18:39:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1520 transitions. [2022-07-12 18:39:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-12 18:39:50,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:50,862 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:50,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 18:39:51,075 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash -260665387, now seen corresponding path program 1 times [2022-07-12 18:39:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:51,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676597737] [2022-07-12 18:39:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:51,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:51,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787258591] [2022-07-12 18:39:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:51,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:51,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:51,102 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:51,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 18:39:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:39:51,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:51,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:51,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:51,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676597737] [2022-07-12 18:39:51,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:51,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787258591] [2022-07-12 18:39:51,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787258591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:51,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:51,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:39:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846397037] [2022-07-12 18:39:51,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:51,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:39:51,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:39:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:39:51,734 INFO L87 Difference]: Start difference. First operand 1250 states and 1520 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 18:39:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:51,930 INFO L93 Difference]: Finished difference Result 1369 states and 1660 transitions. [2022-07-12 18:39:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:39:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 136 [2022-07-12 18:39:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:51,934 INFO L225 Difference]: With dead ends: 1369 [2022-07-12 18:39:51,934 INFO L226 Difference]: Without dead ends: 1369 [2022-07-12 18:39:51,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:39:51,934 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 556 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:51,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 334 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:39:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-07-12 18:39:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 989. [2022-07-12 18:39:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 833 states have (on average 1.2665066026410565) internal successors, (1055), 893 states have internal predecessors, (1055), 61 states have call successors, (61), 28 states have call predecessors, (61), 29 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:39:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1184 transitions. [2022-07-12 18:39:51,945 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1184 transitions. Word has length 136 [2022-07-12 18:39:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:51,945 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1184 transitions. [2022-07-12 18:39:51,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 18:39:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1184 transitions. [2022-07-12 18:39:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-12 18:39:51,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:51,946 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:51,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:52,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-12 18:39:52,159 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash -260665386, now seen corresponding path program 1 times [2022-07-12 18:39:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:52,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145138340] [2022-07-12 18:39:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:52,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:52,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:52,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996694780] [2022-07-12 18:39:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:52,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:52,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:52,186 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:52,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 18:39:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:52,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:39:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:52,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:52,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145138340] [2022-07-12 18:39:52,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996694780] [2022-07-12 18:39:52,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996694780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:52,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:52,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:39:52,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839387397] [2022-07-12 18:39:52,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:52,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:39:52,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:39:52,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:39:52,999 INFO L87 Difference]: Start difference. First operand 989 states and 1184 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 18:39:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:53,162 INFO L93 Difference]: Finished difference Result 981 states and 1169 transitions. [2022-07-12 18:39:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:39:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 136 [2022-07-12 18:39:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:53,165 INFO L225 Difference]: With dead ends: 981 [2022-07-12 18:39:53,165 INFO L226 Difference]: Without dead ends: 981 [2022-07-12 18:39:53,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:39:53,165 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 243 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 333 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:39:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-07-12 18:39:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-07-12 18:39:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 833 states have (on average 1.2484993997599039) internal successors, (1040), 885 states have internal predecessors, (1040), 61 states have call successors, (61), 28 states have call predecessors, (61), 29 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:39:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1169 transitions. [2022-07-12 18:39:53,174 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1169 transitions. Word has length 136 [2022-07-12 18:39:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:53,175 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1169 transitions. [2022-07-12 18:39:53,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 18:39:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1169 transitions. [2022-07-12 18:39:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-12 18:39:53,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:53,177 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:53,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-12 18:39:53,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 18:39:53,379 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting l0_destroyErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1324841975, now seen corresponding path program 1 times [2022-07-12 18:39:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:53,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593331982] [2022-07-12 18:39:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:53,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412299794] [2022-07-12 18:39:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:53,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:53,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:53,418 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:53,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 18:39:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:39:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:53,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:53,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:53,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593331982] [2022-07-12 18:39:53,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:53,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412299794] [2022-07-12 18:39:53,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412299794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:53,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:53,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:39:53,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066380250] [2022-07-12 18:39:53,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:53,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:39:53,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:39:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:39:53,943 INFO L87 Difference]: Start difference. First operand 981 states and 1169 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:39:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:53,962 INFO L93 Difference]: Finished difference Result 1121 states and 1351 transitions. [2022-07-12 18:39:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:39:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-12 18:39:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:53,965 INFO L225 Difference]: With dead ends: 1121 [2022-07-12 18:39:53,965 INFO L226 Difference]: Without dead ends: 1121 [2022-07-12 18:39:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 18:39:53,966 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 215 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:53,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 702 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:39:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-07-12 18:39:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1086. [2022-07-12 18:39:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 936 states have (on average 1.3055555555555556) internal successors, (1222), 989 states have internal predecessors, (1222), 61 states have call successors, (61), 29 states have call predecessors, (61), 31 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:39:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1351 transitions. [2022-07-12 18:39:53,976 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1351 transitions. Word has length 140 [2022-07-12 18:39:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:53,976 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 1351 transitions. [2022-07-12 18:39:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:39:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1351 transitions. [2022-07-12 18:39:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-12 18:39:53,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:53,977 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:53,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:54,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-12 18:39:54,178 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:54,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1324847448, now seen corresponding path program 1 times [2022-07-12 18:39:54,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:54,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434424132] [2022-07-12 18:39:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:54,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:54,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687301746] [2022-07-12 18:39:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:54,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:54,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:54,206 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:54,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 18:39:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:54,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:39:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:55,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:39:55,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:39:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:55,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:55,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434424132] [2022-07-12 18:39:55,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687301746] [2022-07-12 18:39:55,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687301746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:55,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:55,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:39:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312648412] [2022-07-12 18:39:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:55,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:39:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:55,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:39:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:39:55,129 INFO L87 Difference]: Start difference. First operand 1086 states and 1351 transitions. Second operand has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:39:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:55,630 INFO L93 Difference]: Finished difference Result 1398 states and 1727 transitions. [2022-07-12 18:39:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:39:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-12 18:39:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:55,634 INFO L225 Difference]: With dead ends: 1398 [2022-07-12 18:39:55,634 INFO L226 Difference]: Without dead ends: 1398 [2022-07-12 18:39:55,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:39:55,634 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 886 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:55,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 1065 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:39:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-07-12 18:39:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1158. [2022-07-12 18:39:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1009 states have (on average 1.3369672943508424) internal successors, (1349), 1061 states have internal predecessors, (1349), 61 states have call successors, (61), 29 states have call predecessors, (61), 31 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:39:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1478 transitions. [2022-07-12 18:39:55,646 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1478 transitions. Word has length 140 [2022-07-12 18:39:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:55,646 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1478 transitions. [2022-07-12 18:39:55,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:39:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1478 transitions. [2022-07-12 18:39:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-12 18:39:55,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:55,648 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:39:55,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:55,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:55,863 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1324847447, now seen corresponding path program 1 times [2022-07-12 18:39:55,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:55,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125719484] [2022-07-12 18:39:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:55,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:55,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983700108] [2022-07-12 18:39:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:55,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:55,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:55,893 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:55,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 18:39:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:39:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:57,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:39:57,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:39:57,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-12 18:39:57,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 18:39:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:39:57,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:39:57,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125719484] [2022-07-12 18:39:57,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983700108] [2022-07-12 18:39:57,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983700108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:39:57,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:39:57,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:39:57,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114553055] [2022-07-12 18:39:57,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:39:57,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:39:57,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:39:57,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:39:57,366 INFO L87 Difference]: Start difference. First operand 1158 states and 1478 transitions. Second operand has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:39:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:58,124 INFO L93 Difference]: Finished difference Result 1318 states and 1640 transitions. [2022-07-12 18:39:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:39:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 140 [2022-07-12 18:39:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:58,128 INFO L225 Difference]: With dead ends: 1318 [2022-07-12 18:39:58,128 INFO L226 Difference]: Without dead ends: 1318 [2022-07-12 18:39:58,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:39:58,129 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 865 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 810 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:39:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-07-12 18:39:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1245. [2022-07-12 18:39:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1096 states have (on average 1.3731751824817517) internal successors, (1505), 1148 states have internal predecessors, (1505), 61 states have call successors, (61), 29 states have call predecessors, (61), 31 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:39:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1634 transitions. [2022-07-12 18:39:58,142 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1634 transitions. Word has length 140 [2022-07-12 18:39:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:58,142 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1634 transitions. [2022-07-12 18:39:58,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:39:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1634 transitions. [2022-07-12 18:39:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-12 18:39:58,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:58,144 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 18:39:58,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:58,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:58,364 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash 233936620, now seen corresponding path program 1 times [2022-07-12 18:39:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:58,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437982868] [2022-07-12 18:39:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:58,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:58,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:58,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075672653] [2022-07-12 18:39:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:58,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:58,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:58,398 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:58,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 18:39:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:39:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:39:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:39:59,063 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:59,063 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 18:39:59,119 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:39:59,120 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 18:39:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-12 18:39:59,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:59,311 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:39:59,311 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 18:39:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-12 18:39:59,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:39:59,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437982868] [2022-07-12 18:39:59,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:39:59,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075672653] [2022-07-12 18:39:59,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075672653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:39:59,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:39:59,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-12 18:39:59,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272272179] [2022-07-12 18:39:59,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:39:59,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:39:59,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:39:59,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:39:59,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:39:59,347 INFO L87 Difference]: Start difference. First operand 1245 states and 1634 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:39:59,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:39:59,524 INFO L93 Difference]: Finished difference Result 1296 states and 1678 transitions. [2022-07-12 18:39:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:39:59,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 142 [2022-07-12 18:39:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:39:59,531 INFO L225 Difference]: With dead ends: 1296 [2022-07-12 18:39:59,531 INFO L226 Difference]: Without dead ends: 1296 [2022-07-12 18:39:59,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 267 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:39:59,531 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 193 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:39:59,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1180 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 184 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2022-07-12 18:39:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-07-12 18:39:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1296. [2022-07-12 18:39:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1144 states have (on average 1.354020979020979) internal successors, (1549), 1195 states have internal predecessors, (1549), 61 states have call successors, (61), 33 states have call predecessors, (61), 35 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:39:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1678 transitions. [2022-07-12 18:39:59,544 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1678 transitions. Word has length 142 [2022-07-12 18:39:59,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:39:59,544 INFO L495 AbstractCegarLoop]: Abstraction has 1296 states and 1678 transitions. [2022-07-12 18:39:59,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:39:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1678 transitions. [2022-07-12 18:39:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-12 18:39:59,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:39:59,546 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 18:39:59,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:39:59,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-12 18:39:59,767 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:39:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:39:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash 233936621, now seen corresponding path program 1 times [2022-07-12 18:39:59,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:39:59,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77779004] [2022-07-12 18:39:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:59,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:39:59,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:39:59,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526991687] [2022-07-12 18:39:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:39:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:39:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:39:59,796 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:39:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 18:40:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:40:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 18:40:00,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:40:00,717 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:40:00,717 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 18:40:00,733 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:40:00,733 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 18:40:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:40:00,863 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 18:40:00,872 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:40:00,872 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 18:40:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 503 proven. 196 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-07-12 18:40:00,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:40:03,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:40:03,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77779004] [2022-07-12 18:40:03,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:40:03,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526991687] [2022-07-12 18:40:03,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526991687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:40:03,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:40:03,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-12 18:40:03,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141635793] [2022-07-12 18:40:03,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:40:03,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:40:03,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:40:03,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:40:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:40:03,039 INFO L87 Difference]: Start difference. First operand 1296 states and 1678 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 18:40:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:40:04,329 INFO L93 Difference]: Finished difference Result 1555 states and 2001 transitions. [2022-07-12 18:40:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:40:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2022-07-12 18:40:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:40:04,333 INFO L225 Difference]: With dead ends: 1555 [2022-07-12 18:40:04,333 INFO L226 Difference]: Without dead ends: 1555 [2022-07-12 18:40:04,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:40:04,334 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 461 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 4248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2048 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:40:04,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1847 Invalid, 4248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2045 Invalid, 0 Unknown, 2048 Unchecked, 1.1s Time] [2022-07-12 18:40:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2022-07-12 18:40:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1295. [2022-07-12 18:40:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1144 states have (on average 1.347027972027972) internal successors, (1541), 1194 states have internal predecessors, (1541), 61 states have call successors, (61), 33 states have call predecessors, (61), 35 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:40:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1670 transitions. [2022-07-12 18:40:04,349 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1670 transitions. Word has length 142 [2022-07-12 18:40:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:40:04,349 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1670 transitions. [2022-07-12 18:40:04,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 18:40:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1670 transitions. [2022-07-12 18:40:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-12 18:40:04,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:40:04,350 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:40:04,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-12 18:40:04,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-12 18:40:04,572 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting l0_destroyErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:40:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:40:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2075666235, now seen corresponding path program 1 times [2022-07-12 18:40:04,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:40:04,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9133928] [2022-07-12 18:40:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:40:04,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:40:04,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:40:04,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524070570] [2022-07-12 18:40:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:40:04,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:40:04,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:40:04,618 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:40:04,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 18:40:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:40:05,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:40:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:40:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:40:05,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:40:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:40:05,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9133928] [2022-07-12 18:40:05,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:40:05,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524070570] [2022-07-12 18:40:05,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524070570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:40:05,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:40:05,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:40:05,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275502126] [2022-07-12 18:40:05,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:40:05,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:40:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:40:05,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:40:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:40:05,208 INFO L87 Difference]: Start difference. First operand 1295 states and 1670 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:40:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:40:05,239 INFO L93 Difference]: Finished difference Result 1321 states and 1648 transitions. [2022-07-12 18:40:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:40:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 143 [2022-07-12 18:40:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:40:05,241 INFO L225 Difference]: With dead ends: 1321 [2022-07-12 18:40:05,241 INFO L226 Difference]: Without dead ends: 1321 [2022-07-12 18:40:05,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:40:05,242 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 295 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:40:05,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 921 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:40:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-07-12 18:40:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1289. [2022-07-12 18:40:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1138 states have (on average 1.334797891036907) internal successors, (1519), 1188 states have internal predecessors, (1519), 61 states have call successors, (61), 33 states have call predecessors, (61), 35 states have return successors, (68), 67 states have call predecessors, (68), 61 states have call successors, (68) [2022-07-12 18:40:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1648 transitions. [2022-07-12 18:40:05,254 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1648 transitions. Word has length 143 [2022-07-12 18:40:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:40:05,254 INFO L495 AbstractCegarLoop]: Abstraction has 1289 states and 1648 transitions. [2022-07-12 18:40:05,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:40:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1648 transitions. [2022-07-12 18:40:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-12 18:40:05,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:40:05,255 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:40:05,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-12 18:40:05,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-12 18:40:05,470 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-07-12 18:40:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:40:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2075670428, now seen corresponding path program 1 times [2022-07-12 18:40:05,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:40:05,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460571791] [2022-07-12 18:40:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:40:05,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:40:05,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:40:05,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543294820] [2022-07-12 18:40:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:40:05,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:40:05,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:40:05,500 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:40:05,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 18:40:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:40:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 18:40:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:40:06,292 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:40:06,292 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 18:40:06,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:40:07,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:40:07,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 [2022-07-12 18:40:07,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:40:07,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 [2022-07-12 18:40:07,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:40:07,186 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:40:07,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2022-07-12 18:40:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-07-12 18:40:07,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:40:07,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2022-07-12 18:40:45,371 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:40:45,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:40:45,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:40:45,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 5477 treesize of output 5184