./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_insert_equal.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/list-simple/dll2c_insert_equal.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 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:09:49,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:09:49,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:09:49,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:09:49,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:09:49,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:09:49,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:09:49,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:09:49,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:09:49,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:09:49,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:09:49,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:09:49,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:09:49,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:09:49,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:09:49,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:09:49,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:09:49,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:09:49,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:09:49,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:09:49,598 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:09:49,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:09:49,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:09:49,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:09:49,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:09:49,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:09:49,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:09:49,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:09:49,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:09:49,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:09:49,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:09:49,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:09:49,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:09:49,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:09:49,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:09:49,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:09:49,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:09:49,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:09:49,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:09:49,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:09:49,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:09:49,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:09:49,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 19:09:49,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:09:49,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:09:49,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:09:49,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:09:49,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:09:49,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:09:49,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:09:49,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:09:49,649 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:09:49,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:09:49,650 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:09:49,650 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:09:49,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:09:49,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:09:49,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:09:49,651 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:09:49,651 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:09:49,651 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:09:49,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:09:49,653 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:09:49,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:09:49,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:09:49,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:09:49,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:09:49,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:09:49,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:09:49,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:09:49,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:09:49,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 19:09:49,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 19:09:49,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2022-07-12 19:09:49,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:09:49,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:09:49,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:09:49,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:09:49,909 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:09:49,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2022-07-12 19:09:49,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d98554f8/4d3a547a3c4f444096e2a360965a3123/FLAG5e9b7d39b [2022-07-12 19:09:50,367 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:09:50,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2022-07-12 19:09:50,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d98554f8/4d3a547a3c4f444096e2a360965a3123/FLAG5e9b7d39b [2022-07-12 19:09:50,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d98554f8/4d3a547a3c4f444096e2a360965a3123 [2022-07-12 19:09:50,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:09:50,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:09:50,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:09:50,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:09:50,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:09:50,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe79eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50, skipping insertion in model container [2022-07-12 19:09:50,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:09:50,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:09:50,654 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2022-07-12 19:09:50,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:09:50,673 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:09:50,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2022-07-12 19:09:50,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:09:50,767 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:09:50,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50 WrapperNode [2022-07-12 19:09:50,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:09:50,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:09:50,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:09:50,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:09:50,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,830 INFO L137 Inliner]: procedures = 127, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 160 [2022-07-12 19:09:50,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:09:50,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:09:50,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:09:50,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:09:50,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:09:50,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:09:50,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:09:50,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:09:50,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (1/1) ... [2022-07-12 19:09:50,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:09:50,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:50,910 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 19:09:50,916 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 19:09:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 19:09:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 19:09:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-12 19:09:50,941 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-12 19:09:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:09:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:09:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 19:09:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 19:09:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:09:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:09:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 19:09:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 19:09:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:09:50,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:09:51,036 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:09:51,037 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:09:51,491 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:09:51,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:09:51,498 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 19:09:51,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:09:51 BoogieIcfgContainer [2022-07-12 19:09:51,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:09:51,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:09:51,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:09:51,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:09:51,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:09:50" (1/3) ... [2022-07-12 19:09:51,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124859a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:09:51, skipping insertion in model container [2022-07-12 19:09:51,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:50" (2/3) ... [2022-07-12 19:09:51,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124859a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:09:51, skipping insertion in model container [2022-07-12 19:09:51,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:09:51" (3/3) ... [2022-07-12 19:09:51,508 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2022-07-12 19:09:51,524 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:09:51,525 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2022-07-12 19:09:51,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:09:51,575 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@45932ddb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1782d4fe [2022-07-12 19:09:51,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2022-07-12 19:09:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:09:51,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:51,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:09:51,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:09:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash 896534515, now seen corresponding path program 1 times [2022-07-12 19:09:51,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:51,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043228684] [2022-07-12 19:09:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:51,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:51,802 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 19:09:51,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:51,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043228684] [2022-07-12 19:09:51,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043228684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:51,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:51,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112516949] [2022-07-12 19:09:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:51,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:51,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:51,839 INFO L87 Difference]: Start difference. First operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 19:09:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:52,003 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2022-07-12 19:09:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:52,005 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 19:09:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:52,016 INFO L225 Difference]: With dead ends: 151 [2022-07-12 19:09:52,017 INFO L226 Difference]: Without dead ends: 148 [2022-07-12 19:09:52,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:09:52,022 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:52,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 240 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-12 19:09:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-07-12 19:09:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 75 states have (on average 2.026666666666667) internal successors, (152), 143 states have internal predecessors, (152), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2022-07-12 19:09:52,092 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 6 [2022-07-12 19:09:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:52,092 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2022-07-12 19:09:52,093 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 19:09:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2022-07-12 19:09:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:09:52,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:52,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:09:52,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 19:09:52,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:09:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:52,095 INFO L85 PathProgramCache]: Analyzing trace with hash 896534514, now seen corresponding path program 1 times [2022-07-12 19:09:52,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:52,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698240871] [2022-07-12 19:09:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:52,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:52,155 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 19:09:52,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698240871] [2022-07-12 19:09:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698240871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:52,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:52,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:52,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750817604] [2022-07-12 19:09:52,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:52,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:52,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:52,165 INFO L87 Difference]: Start difference. First operand 148 states and 158 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 19:09:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:52,263 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2022-07-12 19:09:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:52,263 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 19:09:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:52,264 INFO L225 Difference]: With dead ends: 145 [2022-07-12 19:09:52,265 INFO L226 Difference]: Without dead ends: 145 [2022-07-12 19:09:52,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:09:52,270 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:52,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-12 19:09:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-07-12 19:09:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2022-07-12 19:09:52,283 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 6 [2022-07-12 19:09:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:52,284 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2022-07-12 19:09:52,284 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 19:09:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2022-07-12 19:09:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 19:09:52,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:52,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:52,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 19:09:52,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:09:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash 976905444, now seen corresponding path program 1 times [2022-07-12 19:09:52,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:52,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733282018] [2022-07-12 19:09:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:52,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:52,370 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 19:09:52,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:52,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733282018] [2022-07-12 19:09:52,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733282018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:52,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:52,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:09:52,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628000709] [2022-07-12 19:09:52,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:52,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:09:52,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:52,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:09:52,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:09:52,373 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:09:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:52,501 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-07-12 19:09:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:09:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-12 19:09:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:52,502 INFO L225 Difference]: With dead ends: 156 [2022-07-12 19:09:52,502 INFO L226 Difference]: Without dead ends: 156 [2022-07-12 19:09:52,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:09:52,506 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:52,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 352 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-12 19:09:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-07-12 19:09:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 141 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2022-07-12 19:09:52,532 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 14 [2022-07-12 19:09:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:52,533 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2022-07-12 19:09:52,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:09:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2022-07-12 19:09:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:09:52,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:52,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:52,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 19:09:52,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:09:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash 302098592, now seen corresponding path program 1 times [2022-07-12 19:09:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:52,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317099972] [2022-07-12 19:09:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:52,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:52,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:52,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 19:09:52,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:52,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317099972] [2022-07-12 19:09:52,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317099972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:52,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:52,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:09:52,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759531222] [2022-07-12 19:09:52,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:52,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:09:52,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:09:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:52,677 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:52,951 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2022-07-12 19:09:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:09:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:52,953 INFO L225 Difference]: With dead ends: 146 [2022-07-12 19:09:52,953 INFO L226 Difference]: Without dead ends: 146 [2022-07-12 19:09:52,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:52,955 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 21 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:52,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 484 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:09:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-12 19:09:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-07-12 19:09:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2022-07-12 19:09:52,965 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 24 [2022-07-12 19:09:52,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:52,966 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2022-07-12 19:09:52,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:52,966 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2022-07-12 19:09:52,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:09:52,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:52,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:52,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 19:09:52,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:09:52,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:52,970 INFO L85 PathProgramCache]: Analyzing trace with hash 302098593, now seen corresponding path program 1 times [2022-07-12 19:09:52,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:52,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170523766] [2022-07-12 19:09:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:52,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:53,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:53,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:53,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170523766] [2022-07-12 19:09:53,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170523766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:53,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:53,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:09:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392813746] [2022-07-12 19:09:53,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:53,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:09:53,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:53,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:09:53,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:53,138 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:53,399 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2022-07-12 19:09:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:53,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:09:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:53,401 INFO L225 Difference]: With dead ends: 145 [2022-07-12 19:09:53,401 INFO L226 Difference]: Without dead ends: 145 [2022-07-12 19:09:53,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:53,402 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 19 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:53,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 508 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-12 19:09:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-07-12 19:09:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 139 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2022-07-12 19:09:53,407 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 24 [2022-07-12 19:09:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:53,407 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2022-07-12 19:09:53,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2022-07-12 19:09:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:09:53,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:53,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:53,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 19:09:53,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:09:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029503, now seen corresponding path program 1 times [2022-07-12 19:09:53,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:53,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389714280] [2022-07-12 19:09:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:53,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:53,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:53,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:53,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389714280] [2022-07-12 19:09:53,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389714280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971067669] [2022-07-12 19:09:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:53,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:53,563 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 19:09:53,570 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 19:09:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 19:09:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:53,758 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 19:09:53,929 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:09:53,929 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 19:09:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:53,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:53,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971067669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:53,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:53,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-07-12 19:09:53,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967448731] [2022-07-12 19:09:53,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:53,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 19:09:53,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 19:09:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-12 19:09:53,990 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:54,281 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2022-07-12 19:09:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:54,281 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-12 19:09:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:54,282 INFO L225 Difference]: With dead ends: 169 [2022-07-12 19:09:54,282 INFO L226 Difference]: Without dead ends: 169 [2022-07-12 19:09:54,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:09:54,283 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 128 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:54,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 457 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 492 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-07-12 19:09:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-12 19:09:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2022-07-12 19:09:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.925) internal successors, (154), 143 states have internal predecessors, (154), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2022-07-12 19:09:54,295 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 26 [2022-07-12 19:09:54,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:54,296 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2022-07-12 19:09:54,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2022-07-12 19:09:54,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:09:54,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:54,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:54,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:54,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 19:09:54,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:09:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:54,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029502, now seen corresponding path program 1 times [2022-07-12 19:09:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:54,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559149368] [2022-07-12 19:09:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:54,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:54,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:54,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559149368] [2022-07-12 19:09:54,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559149368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234708376] [2022-07-12 19:09:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:54,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:54,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:54,731 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 19:09:54,762 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 19:09:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:09:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:54,853 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 19:09:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:55,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:09:55,103 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:09:55,103 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 19:09:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:55,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:59,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234708376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:59,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:59,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-07-12 19:09:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094677998] [2022-07-12 19:09:59,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 19:09:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 19:09:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-12 19:09:59,293 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:09:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:59,912 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2022-07-12 19:09:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:09:59,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-07-12 19:09:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:59,914 INFO L225 Difference]: With dead ends: 151 [2022-07-12 19:09:59,914 INFO L226 Difference]: Without dead ends: 151 [2022-07-12 19:09:59,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-12 19:09:59,915 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 18 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:59,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 944 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1048 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-07-12 19:09:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-12 19:09:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-07-12 19:09:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.9125) internal successors, (153), 143 states have internal predecessors, (153), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2022-07-12 19:09:59,919 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 26 [2022-07-12 19:09:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:59,919 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2022-07-12 19:09:59,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:09:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2022-07-12 19:09:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 19:09:59,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:59,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:59,945 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 19:10:00,131 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,SelfDestructingSolverStorable6 [2022-07-12 19:10:00,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1908047191, now seen corresponding path program 1 times [2022-07-12 19:10:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:00,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817359836] [2022-07-12 19:10:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:00,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817359836] [2022-07-12 19:10:00,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817359836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388740068] [2022-07-12 19:10:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:00,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:10:00,223 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 19:10:00,232 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 19:10:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 19:10:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:00,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:00,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388740068] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:00,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:10:00,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-12 19:10:00,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661013554] [2022-07-12 19:10:00,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:00,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:10:00,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:10:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:10:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:00,385 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:00,530 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2022-07-12 19:10:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:10:00,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-12 19:10:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:00,531 INFO L225 Difference]: With dead ends: 150 [2022-07-12 19:10:00,531 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 19:10:00,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:10:00,532 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 4 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:00,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 750 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:10:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 19:10:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-07-12 19:10:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.9) internal successors, (152), 143 states have internal predecessors, (152), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2022-07-12 19:10:00,536 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 28 [2022-07-12 19:10:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:00,536 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2022-07-12 19:10:00,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2022-07-12 19:10:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:10:00,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:00,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:00,556 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 19:10:00,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:00,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash -984859886, now seen corresponding path program 1 times [2022-07-12 19:10:00,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:00,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960306779] [2022-07-12 19:10:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:10:00,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:00,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960306779] [2022-07-12 19:10:00,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960306779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:00,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009166038] [2022-07-12 19:10:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:00,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:10:00,851 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 19:10:00,870 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 19:10:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:10:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:10:01,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:01,012 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:10:01,013 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 19:10:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:10:01,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009166038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:01,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:10:01,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-07-12 19:10:01,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707248207] [2022-07-12 19:10:01,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:01,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:01,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:10:01,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:01,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:01,034 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:01,219 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2022-07-12 19:10:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:10:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-07-12 19:10:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:01,220 INFO L225 Difference]: With dead ends: 154 [2022-07-12 19:10:01,220 INFO L226 Difference]: Without dead ends: 154 [2022-07-12 19:10:01,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:10:01,221 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 13 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:01,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 351 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:10:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-12 19:10:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-07-12 19:10:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.891566265060241) internal successors, (157), 146 states have internal predecessors, (157), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-07-12 19:10:01,225 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 29 [2022-07-12 19:10:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:01,226 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-07-12 19:10:01,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-07-12 19:10:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:10:01,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:01,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:01,243 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 19:10:01,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:01,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash -984859885, now seen corresponding path program 1 times [2022-07-12 19:10:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:01,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057672602] [2022-07-12 19:10:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:01,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:01,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:01,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:01,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057672602] [2022-07-12 19:10:01,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057672602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626958321] [2022-07-12 19:10:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:01,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:10:01,552 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 19:10:01,554 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 19:10:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:01,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 19:10:01,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:01,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:01,810 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:01,810 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 19:10:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626958321] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:01,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:10:01,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-07-12 19:10:01,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314967206] [2022-07-12 19:10:01,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:01,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 19:10:01,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:10:01,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 19:10:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-12 19:10:01,919 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 19:10:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:02,230 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2022-07-12 19:10:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 19:10:02,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-07-12 19:10:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:02,231 INFO L225 Difference]: With dead ends: 159 [2022-07-12 19:10:02,231 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 19:10:02,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-12 19:10:02,232 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 22 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:02,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1422 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:10:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 19:10:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2022-07-12 19:10:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.8795180722891567) internal successors, (156), 146 states have internal predecessors, (156), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2022-07-12 19:10:02,236 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 29 [2022-07-12 19:10:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:02,236 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2022-07-12 19:10:02,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 19:10:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2022-07-12 19:10:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:10:02,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:02,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:02,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 19:10:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 19:10:02,448 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash -465885389, now seen corresponding path program 1 times [2022-07-12 19:10:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:02,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060250384] [2022-07-12 19:10:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:02,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:02,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 19:10:02,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:02,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060250384] [2022-07-12 19:10:02,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060250384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:02,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:02,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 19:10:02,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514798444] [2022-07-12 19:10:02,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:02,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:10:02,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:10:02,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:10:02,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:10:02,523 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:02,802 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2022-07-12 19:10:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:10:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:10:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:02,804 INFO L225 Difference]: With dead ends: 152 [2022-07-12 19:10:02,804 INFO L226 Difference]: Without dead ends: 152 [2022-07-12 19:10:02,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:10:02,805 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 23 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:02,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 542 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:10:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-12 19:10:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-07-12 19:10:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 83 states have (on average 1.8674698795180722) internal successors, (155), 145 states have internal predecessors, (155), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2022-07-12 19:10:02,809 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 30 [2022-07-12 19:10:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:02,809 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2022-07-12 19:10:02,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2022-07-12 19:10:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:10:02,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:02,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:02,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 19:10:02,810 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash -465885388, now seen corresponding path program 1 times [2022-07-12 19:10:02,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:02,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21044831] [2022-07-12 19:10:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:02,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:02,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:02,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21044831] [2022-07-12 19:10:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21044831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:02,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:02,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 19:10:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130845924] [2022-07-12 19:10:02,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:02,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:10:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:10:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:10:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:10:02,921 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:03,207 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2022-07-12 19:10:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:10:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:10:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:03,209 INFO L225 Difference]: With dead ends: 150 [2022-07-12 19:10:03,209 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 19:10:03,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:10:03,210 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 20 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:03,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 572 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:10:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 19:10:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-07-12 19:10:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 83 states have (on average 1.855421686746988) internal successors, (154), 144 states have internal predecessors, (154), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2022-07-12 19:10:03,216 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 30 [2022-07-12 19:10:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:03,217 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2022-07-12 19:10:03,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2022-07-12 19:10:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 19:10:03,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:03,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:03,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 19:10:03,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:03,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1959133359, now seen corresponding path program 1 times [2022-07-12 19:10:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626715412] [2022-07-12 19:10:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:03,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 19:10:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 19:10:03,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626715412] [2022-07-12 19:10:03,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626715412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230203917] [2022-07-12 19:10:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:03,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:03,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:10:03,321 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 19:10:03,322 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 19:10:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:10:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:10:03,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:03,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230203917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:03,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:10:03,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-12 19:10:03,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991157061] [2022-07-12 19:10:03,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:03,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:10:03,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:10:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:10:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:03,499 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:03,509 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2022-07-12 19:10:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:10:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-12 19:10:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:03,510 INFO L225 Difference]: With dead ends: 138 [2022-07-12 19:10:03,510 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 19:10:03,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:03,511 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:03,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 170 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:10:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 19:10:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-07-12 19:10:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 133 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2022-07-12 19:10:03,515 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 41 [2022-07-12 19:10:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:03,516 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2022-07-12 19:10:03,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2022-07-12 19:10:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:10:03,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:03,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:10:03,545 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 19:10:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:03,720 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash -930567857, now seen corresponding path program 1 times [2022-07-12 19:10:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294297629] [2022-07-12 19:10:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:03,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 19:10:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:10:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294297629] [2022-07-12 19:10:03,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294297629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:03,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271240858] [2022-07-12 19:10:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:03,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:03,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:10:03,937 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 19:10:03,962 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 19:10:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 19:10:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:04,126 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 19:10:04,136 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 5 treesize of output 3 [2022-07-12 19:10:04,205 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:10:04,205 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 19:10:04,441 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:10:04,442 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 19:10:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 19:10:04,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:06,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271240858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:06,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:06,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 16 [2022-07-12 19:10:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028982962] [2022-07-12 19:10:06,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:06,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 19:10:06,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:10:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 19:10:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2022-07-12 19:10:06,652 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 17 states, 16 states have (on average 3.6875) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:10:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:07,112 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2022-07-12 19:10:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:10:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-07-12 19:10:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:07,113 INFO L225 Difference]: With dead ends: 147 [2022-07-12 19:10:07,113 INFO L226 Difference]: Without dead ends: 147 [2022-07-12 19:10:07,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=89, Invalid=416, Unknown=1, NotChecked=0, Total=506 [2022-07-12 19:10:07,114 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 200 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:07,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 678 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 571 Invalid, 0 Unknown, 228 Unchecked, 0.4s Time] [2022-07-12 19:10:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-12 19:10:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 129. [2022-07-12 19:10:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 124 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2022-07-12 19:10:07,117 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 43 [2022-07-12 19:10:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:07,118 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2022-07-12 19:10:07,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:10:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2022-07-12 19:10:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:10:07,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:07,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:10:07,147 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 19:10:07,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:07,319 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:07,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash -930567856, now seen corresponding path program 1 times [2022-07-12 19:10:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:10:07,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661936443] [2022-07-12 19:10:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:10:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:07,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:10:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:07,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:10:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:07,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 19:10:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 19:10:07,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:10:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661936443] [2022-07-12 19:10:07,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661936443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689301064] [2022-07-12 19:10:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:07,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:10:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:10:07,596 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 19:10:07,606 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 19:10:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 19:10:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:07,795 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 19:10:07,815 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 5 treesize of output 3 [2022-07-12 19:10:07,929 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-12 19:10:07,963 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 19:10:08,130 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,SelfDestructingSolverStorable14 [2022-07-12 19:10:08,130 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 113573 column 46: unknown constant v_#length_BEFORE_CALL_4 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.checkOrAddAxiom(DiffWrapperScript.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.convertApplicationTerm(DiffWrapperScript.java:171) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:109) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertTerm(ManagedScript.java:134) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:824) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-12 19:10:08,133 INFO L158 Benchmark]: Toolchain (without parser) took 17745.45ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 70.5MB in the beginning and 59.7MB in the end (delta: 10.8MB). Peak memory consumption was 86.6MB. Max. memory is 16.1GB. [2022-07-12 19:10:08,133 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 102.8MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 19:10:08,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 379.72ms. Allocated memory is still 102.8MB. Free memory was 70.5MB in the beginning and 68.8MB in the end (delta: 1.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 19:10:08,134 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.29ms. Allocated memory is still 102.8MB. Free memory was 68.8MB in the beginning and 66.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 19:10:08,134 INFO L158 Benchmark]: Boogie Preprocessor took 42.01ms. Allocated memory is still 102.8MB. Free memory was 66.4MB in the beginning and 64.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 19:10:08,134 INFO L158 Benchmark]: RCFGBuilder took 626.42ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 64.6MB in the beginning and 89.6MB in the end (delta: -25.0MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. [2022-07-12 19:10:08,134 INFO L158 Benchmark]: TraceAbstraction took 16631.35ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 89.0MB in the beginning and 59.7MB in the end (delta: 29.3MB). Peak memory consumption was 85.7MB. Max. memory is 16.1GB. [2022-07-12 19:10:08,136 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 102.8MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 379.72ms. Allocated memory is still 102.8MB. Free memory was 70.5MB in the beginning and 68.8MB in the end (delta: 1.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.29ms. Allocated memory is still 102.8MB. Free memory was 68.8MB in the beginning and 66.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.01ms. Allocated memory is still 102.8MB. Free memory was 66.4MB in the beginning and 64.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 626.42ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 64.6MB in the beginning and 89.6MB in the end (delta: -25.0MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. * TraceAbstraction took 16631.35ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 89.0MB in the beginning and 59.7MB in the end (delta: 29.3MB). Peak memory consumption was 85.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 113573 column 46: unknown constant v_#length_BEFORE_CALL_4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 113573 column 46: unknown constant v_#length_BEFORE_CALL_4: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-12 19:10:08,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/list-simple/dll2c_insert_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:10:10,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:10:10,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:10:10,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:10:10,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:10:10,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:10:10,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:10:10,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:10:10,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:10:10,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:10:10,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:10:10,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:10:10,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:10:10,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:10:10,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:10:10,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:10:10,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:10:10,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:10:10,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:10:10,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:10:10,095 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:10:10,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:10:10,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:10:10,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:10:10,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:10:10,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:10:10,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:10:10,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:10:10,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:10:10,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:10:10,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:10:10,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:10:10,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:10:10,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:10:10,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:10:10,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:10:10,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:10:10,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:10:10,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:10:10,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:10:10,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:10:10,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:10:10,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 19:10:10,154 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:10:10,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:10:10,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:10:10,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:10:10,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:10:10,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:10:10,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:10:10,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:10:10,157 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:10:10,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:10:10,158 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:10:10,158 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:10:10,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:10:10,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:10:10,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:10:10,159 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:10:10,159 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:10:10,159 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:10:10,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:10:10,160 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:10:10,160 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 19:10:10,160 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 19:10:10,160 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:10:10,160 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:10:10,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:10:10,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:10:10,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:10:10,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:10:10,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:10:10,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:10:10,162 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 19:10:10,162 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:10,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 19:10:10,163 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2022-07-12 19:10:10,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:10:10,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:10:10,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:10:10,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:10:10,472 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:10:10,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2022-07-12 19:10:10,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f73e6d6/949cb6579f734f9f98e1a9da4fbf3ff8/FLAG57563d52a [2022-07-12 19:10:11,046 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:10:11,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2022-07-12 19:10:11,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f73e6d6/949cb6579f734f9f98e1a9da4fbf3ff8/FLAG57563d52a [2022-07-12 19:10:11,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f73e6d6/949cb6579f734f9f98e1a9da4fbf3ff8 [2022-07-12 19:10:11,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:10:11,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:10:11,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:10:11,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:10:11,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:10:11,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:11,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da4a53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11, skipping insertion in model container [2022-07-12 19:10:11,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:11,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:10:11,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:10:11,836 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2022-07-12 19:10:11,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:10:11,853 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:10:11,903 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2022-07-12 19:10:11,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:10:11,934 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:10:11,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11 WrapperNode [2022-07-12 19:10:11,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:10:11,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:10:11,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:10:11,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:10:11,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:11,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,013 INFO L137 Inliner]: procedures = 130, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 161 [2022-07-12 19:10:12,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:10:12,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:10:12,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:10:12,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:10:12,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:10:12,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:10:12,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:10:12,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:10:12,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (1/1) ... [2022-07-12 19:10:12,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:10:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:10:12,076 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 19:10:12,097 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 19:10:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 19:10:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-12 19:10:12,113 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-12 19:10:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:10:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:10:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 19:10:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 19:10:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:10:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:10:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 19:10:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 19:10:12,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 19:10:12,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:10:12,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:10:12,224 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:10:12,225 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:10:12,792 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:10:12,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:10:12,798 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 19:10:12,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:10:12 BoogieIcfgContainer [2022-07-12 19:10:12,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:10:12,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:10:12,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:10:12,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:10:12,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:10:11" (1/3) ... [2022-07-12 19:10:12,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26098df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:10:12, skipping insertion in model container [2022-07-12 19:10:12,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:10:11" (2/3) ... [2022-07-12 19:10:12,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26098df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:10:12, skipping insertion in model container [2022-07-12 19:10:12,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:10:12" (3/3) ... [2022-07-12 19:10:12,811 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2022-07-12 19:10:12,823 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:10:12,823 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2022-07-12 19:10:12,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:10:12,885 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@7badf5dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@50659248 [2022-07-12 19:10:12,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2022-07-12 19:10:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:10:12,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:12,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:10:12,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash 896534515, now seen corresponding path program 1 times [2022-07-12 19:10:12,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:12,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572089780] [2022-07-12 19:10:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:12,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:12,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 19:10:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:10:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:13,063 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 19:10:13,082 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 19:10:13,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:13,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:13,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572089780] [2022-07-12 19:10:13,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572089780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:13,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:13,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:10:13,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755700668] [2022-07-12 19:10:13,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:13,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:10:13,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:10:13,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:10:13,120 INFO L87 Difference]: Start difference. First operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 19:10:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:13,433 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2022-07-12 19:10:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:10:13,438 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 19:10:13,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:13,444 INFO L225 Difference]: With dead ends: 151 [2022-07-12 19:10:13,444 INFO L226 Difference]: Without dead ends: 148 [2022-07-12 19:10:13,446 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 19:10:13,453 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:13,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 240 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:10:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-12 19:10:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-07-12 19:10:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 75 states have (on average 2.026666666666667) internal successors, (152), 143 states have internal predecessors, (152), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2022-07-12 19:10:13,497 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 6 [2022-07-12 19:10:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:13,498 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2022-07-12 19:10:13,498 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 19:10:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2022-07-12 19:10:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:10:13,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:13,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:10:13,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:13,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:13,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash 896534514, now seen corresponding path program 1 times [2022-07-12 19:10:13,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:13,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014910974] [2022-07-12 19:10:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:13,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:13,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:13,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:13,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 19:10:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:10:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:13,773 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 19:10:13,780 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 19:10:13,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:13,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:13,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014910974] [2022-07-12 19:10:13,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014910974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:13,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:13,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:10:13,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627296223] [2022-07-12 19:10:13,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:13,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:10:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:10:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:10:13,789 INFO L87 Difference]: Start difference. First operand 148 states and 158 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 19:10:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:13,993 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2022-07-12 19:10:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:10:13,993 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 19:10:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:13,995 INFO L225 Difference]: With dead ends: 145 [2022-07-12 19:10:13,995 INFO L226 Difference]: Without dead ends: 145 [2022-07-12 19:10:13,995 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 19:10:13,996 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:13,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:10:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-12 19:10:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-07-12 19:10:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2022-07-12 19:10:14,006 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 6 [2022-07-12 19:10:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:14,006 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2022-07-12 19:10:14,006 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 19:10:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2022-07-12 19:10:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 19:10:14,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:14,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:14,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:14,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash 976905444, now seen corresponding path program 1 times [2022-07-12 19:10:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494706202] [2022-07-12 19:10:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:14,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:14,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:14,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:14,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 19:10:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:10:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:14,310 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 19:10:14,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:14,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:14,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494706202] [2022-07-12 19:10:14,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494706202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:14,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:14,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:10:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183984223] [2022-07-12 19:10:14,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:10:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:10:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:10:14,313 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:10:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:14,323 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-07-12 19:10:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:10:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-12 19:10:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:14,326 INFO L225 Difference]: With dead ends: 156 [2022-07-12 19:10:14,326 INFO L226 Difference]: Without dead ends: 156 [2022-07-12 19:10:14,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 19:10:14,327 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:14,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 303 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:10:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-12 19:10:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-07-12 19:10:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 141 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2022-07-12 19:10:14,336 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 14 [2022-07-12 19:10:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:14,337 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2022-07-12 19:10:14,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:10:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2022-07-12 19:10:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:10:14,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:14,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:14,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:14,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:14,547 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 302098592, now seen corresponding path program 1 times [2022-07-12 19:10:14,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636175981] [2022-07-12 19:10:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:14,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:14,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:14,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:14,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 19:10:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:14,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:10:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:14,675 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 19:10:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:14,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:14,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:14,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636175981] [2022-07-12 19:10:14,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636175981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:14,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:14,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:10:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797884727] [2022-07-12 19:10:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:14,726 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:15,196 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2022-07-12 19:10:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:15,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:10:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:15,198 INFO L225 Difference]: With dead ends: 146 [2022-07-12 19:10:15,198 INFO L226 Difference]: Without dead ends: 146 [2022-07-12 19:10:15,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:15,199 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 20 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:15,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 439 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 19:10:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-12 19:10:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-07-12 19:10:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2022-07-12 19:10:15,207 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 24 [2022-07-12 19:10:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:15,208 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2022-07-12 19:10:15,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2022-07-12 19:10:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:10:15,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:15,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:15,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:15,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:15,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash 302098593, now seen corresponding path program 1 times [2022-07-12 19:10:15,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:15,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869477059] [2022-07-12 19:10:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:15,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:15,420 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:15,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 19:10:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:10:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:15,530 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 19:10:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:15,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:15,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869477059] [2022-07-12 19:10:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869477059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:15,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:10:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654915710] [2022-07-12 19:10:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:15,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:15,632 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:16,101 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2022-07-12 19:10:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:10:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:16,103 INFO L225 Difference]: With dead ends: 145 [2022-07-12 19:10:16,103 INFO L226 Difference]: Without dead ends: 145 [2022-07-12 19:10:16,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:16,104 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:16,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 463 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:10:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-12 19:10:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-07-12 19:10:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 139 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2022-07-12 19:10:16,110 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 24 [2022-07-12 19:10:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:16,110 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2022-07-12 19:10:16,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2022-07-12 19:10:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:10:16,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:16,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:16,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-12 19:10:16,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:16,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029503, now seen corresponding path program 1 times [2022-07-12 19:10:16,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:16,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190779563] [2022-07-12 19:10:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:16,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:16,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:16,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:16,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 19:10:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:10:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:16,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:10:16,577 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:10:16,577 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 24 [2022-07-12 19:10:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:16,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:16,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190779563] [2022-07-12 19:10:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190779563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:16,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:16,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-12 19:10:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947844548] [2022-07-12 19:10:16,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:16,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:10:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:10:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:10:16,808 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:17,324 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2022-07-12 19:10:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:10:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-12 19:10:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:17,325 INFO L225 Difference]: With dead ends: 159 [2022-07-12 19:10:17,326 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 19:10:17,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-12 19:10:17,326 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 7 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:17,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 499 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 327 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-07-12 19:10:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 19:10:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-07-12 19:10:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.8505747126436782) internal successors, (161), 150 states have internal predecessors, (161), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2022-07-12 19:10:17,333 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 26 [2022-07-12 19:10:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:17,333 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2022-07-12 19:10:17,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2022-07-12 19:10:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:10:17,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:17,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:17,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:17,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:17,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:17,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029502, now seen corresponding path program 1 times [2022-07-12 19:10:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:17,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100286564] [2022-07-12 19:10:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:17,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:17,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:17,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:17,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 19:10:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:10:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:17,698 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 19:10:17,703 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 19:10:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:17,911 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 19:10:17,923 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:10:17,923 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 19:10:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:17,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:20,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:20,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100286564] [2022-07-12 19:10:20,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100286564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:20,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1024497486] [2022-07-12 19:10:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:20,212 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:20,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:20,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-12 19:10:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:10:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:20,501 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 19:10:20,506 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 19:10:20,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:20,690 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 19:10:20,699 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:10:20,699 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 19:10:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:20,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:20,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1024497486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:20,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:20,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 19:10:20,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288423534] [2022-07-12 19:10:20,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:20,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:10:20,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:10:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 19:10:20,891 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:21,645 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2022-07-12 19:10:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:10:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-12 19:10:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:21,647 INFO L225 Difference]: With dead ends: 159 [2022-07-12 19:10:21,647 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 19:10:21,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-12 19:10:21,648 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 3 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:21,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 489 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 88 Unchecked, 0.7s Time] [2022-07-12 19:10:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 19:10:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-07-12 19:10:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.839080459770115) internal successors, (160), 150 states have internal predecessors, (160), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2022-07-12 19:10:21,653 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 26 [2022-07-12 19:10:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:21,654 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2022-07-12 19:10:21,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2022-07-12 19:10:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 19:10:21,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:21,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:21,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-07-12 19:10:21,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:22,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:22,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:22,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1908047191, now seen corresponding path program 1 times [2022-07-12 19:10:22,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:22,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829452228] [2022-07-12 19:10:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:22,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:22,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:22,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 19:10:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:10:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:22,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:22,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829452228] [2022-07-12 19:10:22,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829452228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:22,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:22,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-12 19:10:22,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535462359] [2022-07-12 19:10:22,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:22,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:22,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:22,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:22,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:22,243 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:22,374 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2022-07-12 19:10:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-12 19:10:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:22,383 INFO L225 Difference]: With dead ends: 158 [2022-07-12 19:10:22,384 INFO L226 Difference]: Without dead ends: 158 [2022-07-12 19:10:22,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:22,384 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 4 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:22,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 705 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:10:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-12 19:10:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-07-12 19:10:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.8275862068965518) internal successors, (159), 150 states have internal predecessors, (159), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 167 transitions. [2022-07-12 19:10:22,404 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 167 transitions. Word has length 28 [2022-07-12 19:10:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:22,405 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 167 transitions. [2022-07-12 19:10:22,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 167 transitions. [2022-07-12 19:10:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:10:22,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:22,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:22,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:22,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:22,606 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:22,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:22,607 INFO L85 PathProgramCache]: Analyzing trace with hash -984859886, now seen corresponding path program 1 times [2022-07-12 19:10:22,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:22,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537390885] [2022-07-12 19:10:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:22,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:22,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:22,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:22,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 19:10:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:22,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:10:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:10:22,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:22,774 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:10:22,775 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 19:10:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:10:22,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:22,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537390885] [2022-07-12 19:10:22,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537390885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:22,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:22,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-12 19:10:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671765001] [2022-07-12 19:10:22,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:22,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:10:22,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:10:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:10:22,792 INFO L87 Difference]: Start difference. First operand 157 states and 167 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:23,034 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2022-07-12 19:10:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:10:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-12 19:10:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:23,036 INFO L225 Difference]: With dead ends: 162 [2022-07-12 19:10:23,036 INFO L226 Difference]: Without dead ends: 162 [2022-07-12 19:10:23,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 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 19:10:23,037 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 9 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:23,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 363 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:10:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-12 19:10:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2022-07-12 19:10:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 90 states have (on average 1.8222222222222222) internal successors, (164), 153 states have internal predecessors, (164), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 172 transitions. [2022-07-12 19:10:23,041 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 172 transitions. Word has length 29 [2022-07-12 19:10:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:23,041 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 172 transitions. [2022-07-12 19:10:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:10:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 172 transitions. [2022-07-12 19:10:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:10:23,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:23,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:23,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:23,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:23,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash -984859885, now seen corresponding path program 1 times [2022-07-12 19:10:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:23,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472184279] [2022-07-12 19:10:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:23,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:23,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:23,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:23,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 19:10:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:10:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:23,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:23,554 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:23,554 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 22 treesize of output 26 [2022-07-12 19:10:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:23,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472184279] [2022-07-12 19:10:23,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472184279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:23,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:23,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-12 19:10:23,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171913101] [2022-07-12 19:10:23,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:23,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 19:10:23,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:23,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 19:10:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-12 19:10:23,870 INFO L87 Difference]: Start difference. First operand 160 states and 172 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:10:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:24,639 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2022-07-12 19:10:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:10:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-12 19:10:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:24,641 INFO L225 Difference]: With dead ends: 167 [2022-07-12 19:10:24,641 INFO L226 Difference]: Without dead ends: 167 [2022-07-12 19:10:24,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:10:24,641 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 16 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:24,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1156 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 19:10:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-12 19:10:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2022-07-12 19:10:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 90 states have (on average 1.8111111111111111) internal successors, (163), 153 states have internal predecessors, (163), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2022-07-12 19:10:24,646 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 29 [2022-07-12 19:10:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:24,646 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2022-07-12 19:10:24,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:10:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2022-07-12 19:10:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:10:24,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:24,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:24,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:24,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:24,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash -465885389, now seen corresponding path program 1 times [2022-07-12 19:10:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764165943] [2022-07-12 19:10:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:24,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:24,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:24,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:24,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 19:10:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:10:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:24,981 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 19:10:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:25,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:25,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764165943] [2022-07-12 19:10:25,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764165943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:25,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:25,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:10:25,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517110000] [2022-07-12 19:10:25,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:25,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:10:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:10:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:25,028 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:25,604 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2022-07-12 19:10:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:10:25,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:10:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:25,605 INFO L225 Difference]: With dead ends: 160 [2022-07-12 19:10:25,606 INFO L226 Difference]: Without dead ends: 160 [2022-07-12 19:10:25,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:10:25,606 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 22 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:25,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 498 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 19:10:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-12 19:10:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-07-12 19:10:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 90 states have (on average 1.8) internal successors, (162), 152 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2022-07-12 19:10:25,624 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 30 [2022-07-12 19:10:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:25,624 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2022-07-12 19:10:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2022-07-12 19:10:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:10:25,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:25,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:25,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:25,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:25,835 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash -465885388, now seen corresponding path program 1 times [2022-07-12 19:10:25,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250011916] [2022-07-12 19:10:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:25,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:25,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 19:10:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:25,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 19:10:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:25,967 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 19:10:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:26,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:26,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:26,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250011916] [2022-07-12 19:10:26,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250011916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:26,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:26,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:10:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233543795] [2022-07-12 19:10:26,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:26,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:10:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:10:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:26,067 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:26,695 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-12 19:10:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:10:26,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:10:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:26,697 INFO L225 Difference]: With dead ends: 158 [2022-07-12 19:10:26,697 INFO L226 Difference]: Without dead ends: 158 [2022-07-12 19:10:26,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:10:26,698 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 20 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:26,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 528 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 19:10:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-12 19:10:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-07-12 19:10:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.788888888888889) internal successors, (161), 151 states have internal predecessors, (161), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:10:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2022-07-12 19:10:26,703 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 30 [2022-07-12 19:10:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:26,704 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2022-07-12 19:10:26,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:10:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2022-07-12 19:10:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 19:10:26,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:26,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:26,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:26,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:26,915 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1959133359, now seen corresponding path program 1 times [2022-07-12 19:10:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:26,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432154355] [2022-07-12 19:10:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:26,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:26,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:26,917 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:26,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 19:10:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:27,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:10:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:10:27,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 19:10:27,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432154355] [2022-07-12 19:10:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432154355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:10:27,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:27,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-12 19:10:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038609486] [2022-07-12 19:10:27,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:27,119 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:10:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:27,143 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-07-12 19:10:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:10:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-07-12 19:10:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:27,152 INFO L225 Difference]: With dead ends: 146 [2022-07-12 19:10:27,152 INFO L226 Difference]: Without dead ends: 146 [2022-07-12 19:10:27,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:27,153 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 124 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:27,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 309 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:10:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-12 19:10:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-07-12 19:10:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 83 states have (on average 1.7710843373493976) internal successors, (147), 140 states have internal predecessors, (147), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 153 transitions. [2022-07-12 19:10:27,160 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 153 transitions. Word has length 41 [2022-07-12 19:10:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:27,160 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 153 transitions. [2022-07-12 19:10:27,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:10:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 153 transitions. [2022-07-12 19:10:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:10:27,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:27,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:10:27,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:27,367 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash -930567857, now seen corresponding path program 1 times [2022-07-12 19:10:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:27,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276783070] [2022-07-12 19:10:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:27,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:27,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:27,369 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:27,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 19:10:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:10:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:27,669 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 19:10:27,689 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 5 treesize of output 3 [2022-07-12 19:10:27,788 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:10:27,789 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 24 [2022-07-12 19:10:27,807 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 5 treesize of output 3 [2022-07-12 19:10:27,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:27,876 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 19:10:28,047 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 19:10:28,048 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 17 [2022-07-12 19:10:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:28,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:28,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276783070] [2022-07-12 19:10:28,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276783070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538005411] [2022-07-12 19:10:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:28,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:28,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:28,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:28,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-12 19:10:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 19:10:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:28,616 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 19:10:28,617 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 17 [2022-07-12 19:10:28,656 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:10:28,656 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 13 treesize of output 9 [2022-07-12 19:10:28,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:28,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:28,725 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 19:10:28,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2022-07-12 19:10:28,816 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:10:28,816 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 22 treesize of output 18 [2022-07-12 19:10:28,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:28,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:28,993 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 19:10:28,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-12 19:10:29,306 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:10:29,306 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 22 treesize of output 18 [2022-07-12 19:10:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:29,394 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 19:10:29,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-12 19:10:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 19:10:29,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:29,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [538005411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:29,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:29,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2022-07-12 19:10:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142162849] [2022-07-12 19:10:29,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 19:10:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 19:10:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-12 19:10:29,583 INFO L87 Difference]: Start difference. First operand 146 states and 153 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:10:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:40,475 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2022-07-12 19:10:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:10:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-12 19:10:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:40,477 INFO L225 Difference]: With dead ends: 153 [2022-07-12 19:10:40,477 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 19:10:40,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-07-12 19:10:40,478 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 14 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:40,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 901 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 417 Invalid, 0 Unknown, 370 Unchecked, 0.6s Time] [2022-07-12 19:10:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 19:10:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-07-12 19:10:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 90 states have (on average 1.7) internal successors, (153), 146 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 159 transitions. [2022-07-12 19:10:40,482 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 159 transitions. Word has length 43 [2022-07-12 19:10:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:40,482 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 159 transitions. [2022-07-12 19:10:40,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:10:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 159 transitions. [2022-07-12 19:10:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:10:40,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:40,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:10:40,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:40,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-12 19:10:40,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:40,888 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:10:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash -930567856, now seen corresponding path program 1 times [2022-07-12 19:10:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:40,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083324439] [2022-07-12 19:10:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:40,890 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:40,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 19:10:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:41,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:10:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:41,154 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 19:10:41,159 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 19:10:41,178 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 5 treesize of output 3 [2022-07-12 19:10:41,182 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 5 treesize of output 3 [2022-07-12 19:10:43,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:43,277 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 19:10:43,286 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:10:43,287 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 19:10:43,325 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 5 treesize of output 3 [2022-07-12 19:10:45,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:45,425 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 19:10:45,640 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:10:45,641 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 19:10:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:45,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:45,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:45,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083324439] [2022-07-12 19:10:45,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083324439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:45,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991815888] [2022-07-12 19:10:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:45,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:45,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:45,970 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:45,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-12 19:10:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:10:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:46,264 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 19:10:46,270 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 5 treesize of output 3 [2022-07-12 19:10:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:46,346 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 19:10:46,404 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 5 treesize of output 3 [2022-07-12 19:10:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:48,584 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 19:10:48,868 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 5 treesize of output 3 [2022-07-12 19:10:48,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:48,952 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 19:10:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 19:10:48,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1991815888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:55,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:55,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-12 19:10:55,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529421695] [2022-07-12 19:10:55,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:55,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 19:10:55,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 19:10:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=431, Unknown=6, NotChecked=0, Total=506 [2022-07-12 19:10:55,775 INFO L87 Difference]: Start difference. First operand 153 states and 159 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:11:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:00,624 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2022-07-12 19:11:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 19:11:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-12 19:11:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:00,626 INFO L225 Difference]: With dead ends: 152 [2022-07-12 19:11:00,626 INFO L226 Difference]: Without dead ends: 152 [2022-07-12 19:11:00,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=112, Invalid=692, Unknown=8, NotChecked=0, Total=812 [2022-07-12 19:11:00,627 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 14 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:00,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 878 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 296 Invalid, 0 Unknown, 459 Unchecked, 0.5s Time] [2022-07-12 19:11:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-12 19:11:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-07-12 19:11:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 90 states have (on average 1.6888888888888889) internal successors, (152), 145 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2022-07-12 19:11:00,631 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 43 [2022-07-12 19:11:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:00,631 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2022-07-12 19:11:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:11:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2022-07-12 19:11:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 19:11:00,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:00,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 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 19:11:00,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:00,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-12 19:11:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:01,044 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883970, now seen corresponding path program 1 times [2022-07-12 19:11:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356590675] [2022-07-12 19:11:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:01,046 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:01,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 19:11:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:01,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 19:11:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:01,359 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 19:11:01,530 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 12 treesize of output 8 [2022-07-12 19:11:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:01,800 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 19 treesize of output 21 [2022-07-12 19:11:01,825 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-12 19:11:01,825 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 24 treesize of output 35 [2022-07-12 19:11:01,889 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 29 treesize of output 17 [2022-07-12 19:11:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:11:01,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:02,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:02,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356590675] [2022-07-12 19:11:02,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356590675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:02,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1212089568] [2022-07-12 19:11:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:02,103 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:02,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:02,105 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:11:02,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-12 19:11:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 19:11:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:02,478 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 19:11:02,762 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 12 treesize of output 8 [2022-07-12 19:11:02,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:02,962 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 19 treesize of output 21 [2022-07-12 19:11:02,987 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-12 19:11:02,987 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 24 treesize of output 35 [2022-07-12 19:11:03,099 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 28 treesize of output 16 [2022-07-12 19:11:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:11:03,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:03,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1212089568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:03,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:03,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-12 19:11:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066512514] [2022-07-12 19:11:03,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:11:03,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 19:11:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 19:11:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=602, Unknown=5, NotChecked=0, Total=702 [2022-07-12 19:11:03,321 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand has 25 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:11:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:04,305 INFO L93 Difference]: Finished difference Result 255 states and 268 transitions. [2022-07-12 19:11:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 19:11:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-12 19:11:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:04,306 INFO L225 Difference]: With dead ends: 255 [2022-07-12 19:11:04,306 INFO L226 Difference]: Without dead ends: 255 [2022-07-12 19:11:04,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=958, Unknown=9, NotChecked=0, Total=1122 [2022-07-12 19:11:04,308 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 132 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:04,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 479 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 524 Invalid, 0 Unknown, 180 Unchecked, 0.8s Time] [2022-07-12 19:11:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-12 19:11:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 159. [2022-07-12 19:11:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.7422680412371134) internal successors, (169), 152 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2022-07-12 19:11:04,312 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 46 [2022-07-12 19:11:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:04,312 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2022-07-12 19:11:04,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:11:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2022-07-12 19:11:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 19:11:04,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:04,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 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 19:11:04,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-12 19:11:04,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:04,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:04,726 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883971, now seen corresponding path program 1 times [2022-07-12 19:11:04,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:04,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565867143] [2022-07-12 19:11:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:04,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:04,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:04,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 19:11:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:04,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 19:11:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:05,064 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 19:11:05,069 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 19:11:05,349 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 22 treesize of output 14 [2022-07-12 19:11:05,354 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 7 treesize of output 3 [2022-07-12 19:11:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:05,686 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 28 treesize of output 28 [2022-07-12 19:11:05,700 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 19:11:05,700 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 18 treesize of output 18 [2022-07-12 19:11:05,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:05,711 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 14 treesize of output 16 [2022-07-12 19:11:05,723 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 16 treesize of output 18 [2022-07-12 19:11:05,807 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 19:11:05,811 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 25 treesize of output 13 [2022-07-12 19:11:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:11:05,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:06,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:06,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565867143] [2022-07-12 19:11:06,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565867143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:06,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [949096879] [2022-07-12 19:11:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:06,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:06,410 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:11:06,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-12 19:11:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:06,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 19:11:06,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:06,890 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 19:11:06,895 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 19:11:07,363 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 22 treesize of output 14 [2022-07-12 19:11:07,367 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 7 treesize of output 3 [2022-07-12 19:11:07,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:07,624 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 16 treesize of output 18 [2022-07-12 19:11:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:07,641 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 14 treesize of output 16 [2022-07-12 19:11:07,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:07,652 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 28 treesize of output 28 [2022-07-12 19:11:07,666 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 19:11:07,667 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 18 treesize of output 18 [2022-07-12 19:11:07,765 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 19:11:07,768 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 25 treesize of output 13 [2022-07-12 19:11:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:11:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:08,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [949096879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:08,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:08,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 27 [2022-07-12 19:11:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168831452] [2022-07-12 19:11:08,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:11:08,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 19:11:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 19:11:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=934, Unknown=5, NotChecked=0, Total=1056 [2022-07-12 19:11:08,211 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 28 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:11:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:09,724 INFO L93 Difference]: Finished difference Result 256 states and 268 transitions. [2022-07-12 19:11:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 19:11:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-12 19:11:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:09,726 INFO L225 Difference]: With dead ends: 256 [2022-07-12 19:11:09,726 INFO L226 Difference]: Without dead ends: 256 [2022-07-12 19:11:09,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=188, Invalid=1443, Unknown=9, NotChecked=0, Total=1640 [2022-07-12 19:11:09,727 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 139 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:09,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 563 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 669 Invalid, 0 Unknown, 172 Unchecked, 1.1s Time] [2022-07-12 19:11:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-12 19:11:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 159. [2022-07-12 19:11:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.7216494845360826) internal successors, (167), 152 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 173 transitions. [2022-07-12 19:11:09,731 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 173 transitions. Word has length 46 [2022-07-12 19:11:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:09,732 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 173 transitions. [2022-07-12 19:11:09,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:11:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 173 transitions. [2022-07-12 19:11:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 19:11:09,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:09,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 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 19:11:09,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:09,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:10,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:10,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1771238793, now seen corresponding path program 1 times [2022-07-12 19:11:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:10,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928207397] [2022-07-12 19:11:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:10,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:10,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:10,147 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:10,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 19:11:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:11:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:11:10,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:10,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:10,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928207397] [2022-07-12 19:11:10,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928207397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:10,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:10,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:11:10,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751472608] [2022-07-12 19:11:10,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:11:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:11:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:11:10,361 INFO L87 Difference]: Start difference. First operand 159 states and 173 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:10,395 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2022-07-12 19:11:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:11:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-07-12 19:11:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:10,397 INFO L225 Difference]: With dead ends: 155 [2022-07-12 19:11:10,397 INFO L226 Difference]: Without dead ends: 155 [2022-07-12 19:11:10,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 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 19:11:10,398 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 122 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:10,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 284 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:11:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-12 19:11:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-07-12 19:11:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 92 states have (on average 1.673913043478261) internal successors, (154), 147 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2022-07-12 19:11:10,406 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 47 [2022-07-12 19:11:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:10,406 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2022-07-12 19:11:10,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2022-07-12 19:11:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 19:11:10,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:10,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:11:10,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:10,618 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1351857860, now seen corresponding path program 1 times [2022-07-12 19:11:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355499589] [2022-07-12 19:11:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:10,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:10,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:10,621 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:10,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 19:11:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:10,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:11:10,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:11:10,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:11:11,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355499589] [2022-07-12 19:11:11,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355499589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:11:11,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:11,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 19:11:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910321727] [2022-07-12 19:11:11,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:11:11,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:11:11,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:11,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:11:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:11:11,332 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:11:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:11,374 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2022-07-12 19:11:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:11:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2022-07-12 19:11:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:11,375 INFO L225 Difference]: With dead ends: 151 [2022-07-12 19:11:11,375 INFO L226 Difference]: Without dead ends: 151 [2022-07-12 19:11:11,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:11:11,375 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 224 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:11,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 372 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:11:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-12 19:11:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-07-12 19:11:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 144 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2022-07-12 19:11:11,378 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 49 [2022-07-12 19:11:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:11,379 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2022-07-12 19:11:11,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:11:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2022-07-12 19:11:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 19:11:11,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:11,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 19:11:11,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:11,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:11,587 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1042077693, now seen corresponding path program 1 times [2022-07-12 19:11:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:11,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743914097] [2022-07-12 19:11:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:11,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:11,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:11,589 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:11,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 19:11:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:11:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:11:11,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:11,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:11,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743914097] [2022-07-12 19:11:11,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743914097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:11,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:11,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:11:11,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757325735] [2022-07-12 19:11:11,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:11,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:11:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:11:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:11:11,805 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:12,027 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2022-07-12 19:11:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:11:12,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-12 19:11:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:12,029 INFO L225 Difference]: With dead ends: 168 [2022-07-12 19:11:12,029 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 19:11:12,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 19:11:12,029 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 103 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:12,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 197 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:11:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 19:11:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2022-07-12 19:11:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.6373626373626373) internal successors, (149), 143 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2022-07-12 19:11:12,033 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 50 [2022-07-12 19:11:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:12,034 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2022-07-12 19:11:12,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2022-07-12 19:11:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 19:11:12,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:12,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 19:11:12,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:12,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:12,239 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1042077694, now seen corresponding path program 1 times [2022-07-12 19:11:12,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:12,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904553786] [2022-07-12 19:11:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:12,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:12,241 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:12,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 19:11:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:12,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:11:12,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:11:12,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:12,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904553786] [2022-07-12 19:11:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904553786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:12,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:11:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276694357] [2022-07-12 19:11:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:11:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:11:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:11:12,519 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:12,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:12,855 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2022-07-12 19:11:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:11:12,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-12 19:11:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:12,856 INFO L225 Difference]: With dead ends: 149 [2022-07-12 19:11:12,857 INFO L226 Difference]: Without dead ends: 149 [2022-07-12 19:11:12,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 19:11:12,857 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 106 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:12,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 195 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:11:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-12 19:11:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-07-12 19:11:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.6263736263736264) internal successors, (148), 142 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-07-12 19:11:12,861 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 50 [2022-07-12 19:11:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:12,861 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-07-12 19:11:12,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-07-12 19:11:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 19:11:12,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:12,862 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 19:11:12,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-12 19:11:13,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:13,073 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1042078141, now seen corresponding path program 1 times [2022-07-12 19:11:13,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:13,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604327497] [2022-07-12 19:11:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:13,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:13,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:13,075 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:13,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 19:11:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 19:11:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:11:13,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:13,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:13,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604327497] [2022-07-12 19:11:13,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604327497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:13,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:13,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:11:13,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514751918] [2022-07-12 19:11:13,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:13,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:11:13,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:11:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:11:13,330 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:13,493 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2022-07-12 19:11:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:11:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-12 19:11:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:13,494 INFO L225 Difference]: With dead ends: 161 [2022-07-12 19:11:13,494 INFO L226 Difference]: Without dead ends: 161 [2022-07-12 19:11:13,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 19:11:13,495 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 95 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:13,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 112 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:11:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-12 19:11:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 143. [2022-07-12 19:11:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5604395604395604) internal successors, (142), 136 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2022-07-12 19:11:13,498 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 50 [2022-07-12 19:11:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:13,498 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2022-07-12 19:11:13,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2022-07-12 19:11:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 19:11:13,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:13,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 19:11:13,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:13,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:13,699 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:13,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1042078142, now seen corresponding path program 1 times [2022-07-12 19:11:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116919863] [2022-07-12 19:11:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:13,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:13,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:13,701 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:13,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 19:11:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:13,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:11:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:11:13,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:13,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116919863] [2022-07-12 19:11:13,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116919863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:13,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:13,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:11:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005238332] [2022-07-12 19:11:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:11:13,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:11:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:11:13,991 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:14,150 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-07-12 19:11:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:11:14,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-07-12 19:11:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:14,151 INFO L225 Difference]: With dead ends: 137 [2022-07-12 19:11:14,151 INFO L226 Difference]: Without dead ends: 137 [2022-07-12 19:11:14,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:11:14,152 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 293 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:14,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 124 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:11:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-12 19:11:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-12 19:11:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.4945054945054945) internal successors, (136), 130 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2022-07-12 19:11:14,155 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 50 [2022-07-12 19:11:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:14,156 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2022-07-12 19:11:14,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2022-07-12 19:11:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:11:14,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:14,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 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 19:11:14,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:14,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:14,363 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2055329846, now seen corresponding path program 1 times [2022-07-12 19:11:14,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:14,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99448962] [2022-07-12 19:11:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:14,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:14,366 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:14,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 19:11:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:14,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:11:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:14,584 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 19:11:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 19:11:14,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:14,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99448962] [2022-07-12 19:11:14,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99448962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:14,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:14,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:11:14,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437132390] [2022-07-12 19:11:14,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:14,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:11:14,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:14,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:11:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:11:14,623 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:15,022 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2022-07-12 19:11:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:11:15,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-12 19:11:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:15,023 INFO L225 Difference]: With dead ends: 149 [2022-07-12 19:11:15,023 INFO L226 Difference]: Without dead ends: 149 [2022-07-12 19:11:15,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:11:15,024 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:15,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 267 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:11:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-12 19:11:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2022-07-12 19:11:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 124 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2022-07-12 19:11:15,027 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 51 [2022-07-12 19:11:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:15,027 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2022-07-12 19:11:15,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2022-07-12 19:11:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:11:15,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:15,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 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 19:11:15,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:15,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:15,231 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2055329845, now seen corresponding path program 1 times [2022-07-12 19:11:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092871612] [2022-07-12 19:11:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:15,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:15,233 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:15,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 19:11:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:15,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:11:15,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:15,454 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 19:11:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 19:11:15,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:15,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092871612] [2022-07-12 19:11:15,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092871612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:15,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:15,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:11:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525876374] [2022-07-12 19:11:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:11:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:11:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:11:15,532 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:15,974 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2022-07-12 19:11:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:11:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-12 19:11:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:15,975 INFO L225 Difference]: With dead ends: 125 [2022-07-12 19:11:15,975 INFO L226 Difference]: Without dead ends: 125 [2022-07-12 19:11:15,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:11:15,976 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 82 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:15,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 278 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:11:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-12 19:11:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-12 19:11:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 118 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2022-07-12 19:11:15,979 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 51 [2022-07-12 19:11:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:15,979 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2022-07-12 19:11:15,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:11:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2022-07-12 19:11:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 19:11:15,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:15,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:15,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:16,193 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 512975501, now seen corresponding path program 1 times [2022-07-12 19:11:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075888999] [2022-07-12 19:11:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:16,196 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:16,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 19:11:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 19:11:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:16,614 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 19:11:16,807 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:11:16,807 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 20 treesize of output 27 [2022-07-12 19:11:16,893 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 11 treesize of output 7 [2022-07-12 19:11:16,967 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 14 treesize of output 16 [2022-07-12 19:11:17,095 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:11:17,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-07-12 19:11:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:17,137 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 35 treesize of output 30 [2022-07-12 19:11:17,248 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-12 19:11:17,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2022-07-12 19:11:17,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-07-12 19:11:17,260 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 7 treesize of output 3 [2022-07-12 19:11:17,563 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-12 19:11:17,563 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 41 treesize of output 70 [2022-07-12 19:11:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:17,586 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:11:17,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2022-07-12 19:11:17,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:17,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:11:17,726 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 19:11:17,994 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-12 19:11:17,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 44 [2022-07-12 19:11:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:11:18,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:18,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075888999] [2022-07-12 19:11:18,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075888999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031765782] [2022-07-12 19:11:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:18,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:18,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:18,665 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:11:18,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-12 19:11:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:19,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 19:11:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:19,298 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 19:11:19,538 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:11:19,538 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 20 treesize of output 27 [2022-07-12 19:11:19,733 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 11 treesize of output 7 [2022-07-12 19:11:19,867 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 14 treesize of output 16 [2022-07-12 19:11:20,112 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:11:20,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-07-12 19:11:20,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:20,204 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 35 treesize of output 30 [2022-07-12 19:11:20,412 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:11:20,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 29 [2022-07-12 19:11:20,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-07-12 19:11:20,421 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 7 treesize of output 3 [2022-07-12 19:11:20,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:20,652 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 14 treesize of output 16 [2022-07-12 19:11:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:20,671 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:11:20,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 50 [2022-07-12 19:11:20,710 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-12 19:11:20,710 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 41 treesize of output 70 [2022-07-12 19:11:20,910 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 19:11:21,369 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:11:21,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 39 [2022-07-12 19:11:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:11:21,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:21,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031765782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:21,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:21,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2022-07-12 19:11:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880020630] [2022-07-12 19:11:21,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:11:21,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 19:11:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 19:11:21,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2047, Unknown=6, NotChecked=0, Total=2256 [2022-07-12 19:11:21,875 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:11:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:22,793 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-07-12 19:11:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 19:11:22,793 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-07-12 19:11:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:22,794 INFO L225 Difference]: With dead ends: 124 [2022-07-12 19:11:22,794 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 19:11:22,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=266, Invalid=2587, Unknown=9, NotChecked=0, Total=2862 [2022-07-12 19:11:22,795 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 26 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:22,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 498 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 273 Invalid, 0 Unknown, 265 Unchecked, 0.4s Time] [2022-07-12 19:11:22,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 19:11:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-12 19:11:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 117 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2022-07-12 19:11:22,799 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 53 [2022-07-12 19:11:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:22,799 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2022-07-12 19:11:22,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:11:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2022-07-12 19:11:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 19:11:22,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:22,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:22,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-12 19:11:23,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-07-12 19:11:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:23,213 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:23,213 INFO L85 PathProgramCache]: Analyzing trace with hash 512975502, now seen corresponding path program 1 times [2022-07-12 19:11:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:23,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894702276] [2022-07-12 19:11:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:23,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:23,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:23,215 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:23,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 19:11:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-12 19:11:23,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:23,621 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 19:11:23,625 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 19:11:23,903 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:11:23,903 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 20 treesize of output 27 [2022-07-12 19:11:23,921 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 19:11:24,043 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 11 treesize of output 7 [2022-07-12 19:11:24,049 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 11 treesize of output 7 [2022-07-12 19:11:24,155 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 14 treesize of output 16 [2022-07-12 19:11:24,161 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 14 treesize of output 16 [2022-07-12 19:11:24,335 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:11:24,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 46 [2022-07-12 19:11:24,340 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 18 treesize of output 20 [2022-07-12 19:11:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:24,400 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 42 treesize of output 33 [2022-07-12 19:11:24,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:24,410 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 19:11:24,565 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-12 19:11:24,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2022-07-12 19:11:24,576 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 19:11:24,576 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:11:24,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-12 19:11:24,587 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 19:11:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:24,934 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:11:24,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2022-07-12 19:11:24,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:24,957 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 19:11:24,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-12 19:11:24,985 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-12 19:11:24,985 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 33 treesize of output 35 [2022-07-12 19:11:24,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 19:11:25,395 INFO L356 Elim1Store]: treesize reduction 15, result has 53.1 percent of original size [2022-07-12 19:11:25,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 58 [2022-07-12 19:11:25,420 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-12 19:11:25,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2022-07-12 19:11:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:11:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:26,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:26,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894702276] [2022-07-12 19:11:26,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894702276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:26,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1291178606] [2022-07-12 19:11:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:26,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:26,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:26,531 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:11:26,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-12 19:11:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 19:11:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:27,263 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 19:11:27,269 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 19:11:27,621 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:11:27,621 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 19:11:27,645 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:11:27,645 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 20 treesize of output 27 [2022-07-12 19:11:27,964 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 11 treesize of output 7 [2022-07-12 19:11:27,970 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 11 treesize of output 7 [2022-07-12 19:11:28,147 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 14 treesize of output 16 [2022-07-12 19:11:28,158 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 14 treesize of output 16 [2022-07-12 19:11:28,469 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:11:28,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 46 [2022-07-12 19:11:28,479 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 18 treesize of output 20 [2022-07-12 19:11:28,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:28,613 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 42 treesize of output 33 [2022-07-12 19:11:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:28,628 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 19:11:28,899 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:11:28,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 39 [2022-07-12 19:11:28,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-12 19:11:28,918 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 19:11:28,925 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:11:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:29,223 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 19:11:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:29,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:29,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:29,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-12 19:11:29,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:29,253 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:11:29,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2022-07-12 19:11:29,275 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-12 19:11:29,275 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 33 treesize of output 35 [2022-07-12 19:11:29,855 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 19:11:29,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 49 [2022-07-12 19:11:29,872 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:11:29,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-12 19:11:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:11:29,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:30,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1291178606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:30,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:30,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2022-07-12 19:11:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057220536] [2022-07-12 19:11:30,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:11:30,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 19:11:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 19:11:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2062, Unknown=3, NotChecked=0, Total=2256 [2022-07-12 19:11:30,514 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:11:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:31,671 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-07-12 19:11:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 19:11:31,672 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-07-12 19:11:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:31,673 INFO L225 Difference]: With dead ends: 123 [2022-07-12 19:11:31,673 INFO L226 Difference]: Without dead ends: 123 [2022-07-12 19:11:31,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=261, Invalid=2702, Unknown=7, NotChecked=0, Total=2970 [2022-07-12 19:11:31,674 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 100 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:31,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 530 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 228 Invalid, 0 Unknown, 330 Unchecked, 0.4s Time] [2022-07-12 19:11:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-12 19:11:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-07-12 19:11:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 91 states have (on average 1.3406593406593406) internal successors, (122), 116 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2022-07-12 19:11:31,677 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 53 [2022-07-12 19:11:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:31,677 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2022-07-12 19:11:31,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:11:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2022-07-12 19:11:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 19:11:31,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:31,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:31,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:31,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-12 19:11:32,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:32,091 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash -951779474, now seen corresponding path program 1 times [2022-07-12 19:11:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875784941] [2022-07-12 19:11:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:32,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:32,093 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:32,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-12 19:11:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:32,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:11:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:11:32,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:32,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:32,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875784941] [2022-07-12 19:11:32,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875784941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:32,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:32,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:11:32,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284880740] [2022-07-12 19:11:32,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:11:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:11:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:11:32,378 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:32,589 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-07-12 19:11:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:11:32,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-07-12 19:11:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:32,590 INFO L225 Difference]: With dead ends: 138 [2022-07-12 19:11:32,590 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 19:11:32,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 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 19:11:32,590 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 164 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:32,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 122 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:11:32,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 19:11:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2022-07-12 19:11:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 113 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-07-12 19:11:32,593 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 55 [2022-07-12 19:11:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:32,593 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-07-12 19:11:32,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-07-12 19:11:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 19:11:32,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:32,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:32,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:32,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:32,804 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash -951779473, now seen corresponding path program 1 times [2022-07-12 19:11:32,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792759676] [2022-07-12 19:11:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:32,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:32,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:32,806 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:32,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 19:11:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:33,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:11:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:11:33,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:33,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:33,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792759676] [2022-07-12 19:11:33,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792759676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:33,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:33,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:11:33,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101529925] [2022-07-12 19:11:33,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:33,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:11:33,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:33,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:11:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:11:33,178 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:33,345 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-07-12 19:11:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:11:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-07-12 19:11:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:33,346 INFO L225 Difference]: With dead ends: 117 [2022-07-12 19:11:33,347 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 19:11:33,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 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 19:11:33,347 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:33,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 124 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:11:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 19:11:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-12 19:11:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 110 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:11:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2022-07-12 19:11:33,350 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 55 [2022-07-12 19:11:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:33,351 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2022-07-12 19:11:33,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:11:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2022-07-12 19:11:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 19:11:33,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:33,352 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:33,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:33,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:33,563 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:11:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash 167962770, now seen corresponding path program 1 times [2022-07-12 19:11:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:33,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522922407] [2022-07-12 19:11:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:33,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:33,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:33,566 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:11:33,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-12 19:11:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 19:11:34,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:34,038 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 19:11:34,042 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 19:11:34,059 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 5 treesize of output 3 [2022-07-12 19:11:34,062 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 5 treesize of output 3 [2022-07-12 19:11:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:34,159 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 19:11:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:34,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:11:34,216 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 5 treesize of output 3 [2022-07-12 19:11:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:36,335 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 19:11:36,489 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 6 treesize of output 5 [2022-07-12 19:11:36,600 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 7 treesize of output 3 [2022-07-12 19:11:36,603 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 5 treesize of output 3 [2022-07-12 19:11:36,640 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 19:11:36,923 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:11:36,923 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 19:11:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:36,942 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 14 treesize of output 16 [2022-07-12 19:11:37,501 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:11:37,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-07-12 19:11:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:37,592 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 23 treesize of output 23 [2022-07-12 19:11:37,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:37,622 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 23 treesize of output 23 [2022-07-12 19:11:37,676 INFO L356 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-07-12 19:11:37,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 29 [2022-07-12 19:11:37,694 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:11:37,694 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 13 treesize of output 17 [2022-07-12 19:11:38,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:11:38,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-07-12 19:11:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:11:38,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:46,492 INFO L356 Elim1Store]: treesize reduction 5, result has 91.8 percent of original size [2022-07-12 19:11:46,493 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 188 treesize of output 187 [2022-07-12 19:11:46,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:46,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522922407] [2022-07-12 19:11:46,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522922407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:46,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1066765318] [2022-07-12 19:11:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:46,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:46,804 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:11:46,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-12 19:11:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:47,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 19:11:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:47,398 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 19:11:47,476 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 5 treesize of output 3 [2022-07-12 19:11:47,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:47,706 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 19:11:47,735 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 5 treesize of output 3 [2022-07-12 19:11:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:47,806 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 19:11:47,908 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 7 treesize of output 3 [2022-07-12 19:11:47,911 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 5 treesize of output 3 [2022-07-12 19:11:47,929 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 19:11:48,167 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:11:48,167 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 19:11:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:48,190 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 14 treesize of output 16 [2022-07-12 19:11:48,653 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:11:48,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 33 [2022-07-12 19:11:48,661 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 5 treesize of output 3 [2022-07-12 19:11:48,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:48,684 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 23 treesize of output 23 [2022-07-12 19:11:48,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:48,715 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 23 treesize of output 23 [2022-07-12 19:11:48,763 INFO L356 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-07-12 19:11:48,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 29 [2022-07-12 19:11:48,779 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:11:48,779 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 13 treesize of output 17 [2022-07-12 19:11:49,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:11:49,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-07-12 19:11:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:11:49,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:58,410 INFO L356 Elim1Store]: treesize reduction 5, result has 94.4 percent of original size [2022-07-12 19:11:58,410 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 272 treesize of output 271 [2022-07-12 19:11:59,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1066765318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:59,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:59,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 32 [2022-07-12 19:11:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637336754] [2022-07-12 19:11:59,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:11:59,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 19:11:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 19:11:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2697, Unknown=74, NotChecked=0, Total=2970 [2022-07-12 19:11:59,015 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand has 33 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:12:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:12:00,670 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2022-07-12 19:12:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 19:12:00,670 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-12 19:12:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:12:00,671 INFO L225 Difference]: With dead ends: 121 [2022-07-12 19:12:00,671 INFO L226 Difference]: Without dead ends: 121 [2022-07-12 19:12:00,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=250, Invalid=3456, Unknown=76, NotChecked=0, Total=3782 [2022-07-12 19:12:00,672 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 19 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:12:00,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 893 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 520 Unchecked, 0.6s Time] [2022-07-12 19:12:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-12 19:12:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-12 19:12:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 114 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:12:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2022-07-12 19:12:00,675 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 57 [2022-07-12 19:12:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:12:00,675 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2022-07-12 19:12:00,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:12:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2022-07-12 19:12:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 19:12:00,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:12:00,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:00,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-12 19:12:00,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-07-12 19:12:01,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:12:01,077 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-07-12 19:12:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:12:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash 167962771, now seen corresponding path program 1 times [2022-07-12 19:12:01,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:12:01,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351146726] [2022-07-12 19:12:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:12:01,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:12:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:12:01,078 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:12:01,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-12 19:12:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:12:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-12 19:12:01,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:12:01,588 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 19:12:01,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:01,593 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 19:12:01,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:01,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:12:01,620 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 5 treesize of output 3 [2022-07-12 19:12:01,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:01,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 19:12:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:01,770 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-12 19:12:01,770 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 39 [2022-07-12 19:12:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:01,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:12:01,817 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 5 treesize of output 3 [2022-07-12 19:12:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:02,012 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 19:12:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:02,040 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:12:02,040 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 2 case distinctions, treesize of input 22 treesize of output 32 [2022-07-12 19:12:02,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:12:02,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:12:02,615 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 42 treesize of output 22 [2022-07-12 19:12:02,620 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 7 treesize of output 3 [2022-07-12 19:12:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:02,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-07-12 19:12:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:02,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:12:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:03,169 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 48 treesize of output 42 [2022-07-12 19:12:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:03,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:03,216 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-12 19:12:03,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 27 [2022-07-12 19:12:03,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:03,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-12 19:12:03,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:03,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:12:04,223 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:12:04,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2022-07-12 19:12:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:04,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 20 [2022-07-12 19:12:04,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:04,380 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 47 treesize of output 41 [2022-07-12 19:12:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:04,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:12:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:04,440 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 47 treesize of output 41 [2022-07-12 19:12:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:12:04,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:12:04,536 INFO L356 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-07-12 19:12:04,536 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 1 case distinctions, treesize of input 54 treesize of output 41 [2022-07-12 19:12:04,573 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-12 19:12:04,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 [2022-07-12 19:12:05,966 INFO L356 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2022-07-12 19:12:05,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 156 [2022-07-12 19:12:05,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:12:05,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 170 treesize of output 170 [2022-07-12 19:12:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:12:10,963 INFO L328 TraceCheckSpWp]: Computing backward predicates...