./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/dll2n_append_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 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:43:20,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:43:20,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:43:20,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:43:20,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:43:20,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:43:20,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:43:20,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:43:20,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:43:20,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:43:20,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:43:20,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:43:20,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:43:20,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:43:20,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:43:20,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:43:20,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:43:20,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:43:20,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:43:20,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:43:20,655 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:43:20,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:43:20,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:43:20,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:43:20,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:43:20,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:43:20,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:43:20,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:43:20,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:43:20,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:43:20,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:43:20,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:43:20,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:43:20,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:43:20,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:43:20,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:43:20,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:43:20,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:43:20,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:43:20,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:43:20,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:43:20,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:43:20,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:43:20,713 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:43:20,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:43:20,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:43:20,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:43:20,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:43:20,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:43:20,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:43:20,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:43:20,717 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:43:20,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:43:20,718 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:43:20,718 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:43:20,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:43:20,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:43:20,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:43:20,719 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:43:20,719 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:43:20,719 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:43:20,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:43:20,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:43:20,720 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:43:20,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:43:20,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:43:20,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:43:20,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:43:20,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:43:20,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:43:20,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:43:20,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:43:20,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:43:20,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2022-07-21 17:43:21,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:43:21,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:43:21,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:43:21,073 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:43:21,073 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:43:21,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2022-07-21 17:43:21,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d1bfaa7/4998658a52e24ea58bdbc00a660ad31a/FLAG57376f7fd [2022-07-21 17:43:21,612 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:43:21,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2022-07-21 17:43:21,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d1bfaa7/4998658a52e24ea58bdbc00a660ad31a/FLAG57376f7fd [2022-07-21 17:43:21,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d1bfaa7/4998658a52e24ea58bdbc00a660ad31a [2022-07-21 17:43:21,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:43:21,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:43:21,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:43:21,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:43:21,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:43:21,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:43:21" (1/1) ... [2022-07-21 17:43:21,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d837a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:21, skipping insertion in model container [2022-07-21 17:43:21,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:43:21" (1/1) ... [2022-07-21 17:43:21,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:43:22,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:43:22,326 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/dll2n_append_equal.i[24333,24346] [2022-07-21 17:43:22,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:43:22,344 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:43:22,398 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/dll2n_append_equal.i[24333,24346] [2022-07-21 17:43:22,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:43:22,433 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:43:22,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22 WrapperNode [2022-07-21 17:43:22,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:43:22,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:43:22,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:43:22,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:43:22,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,503 INFO L137 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 125 [2022-07-21 17:43:22,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:43:22,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:43:22,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:43:22,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:43:22,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:43:22,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:43:22,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:43:22,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:43:22,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (1/1) ... [2022-07-21 17:43:22,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:43:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:22,605 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) [2022-07-21 17:43:22,627 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 [2022-07-21 17:43:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:43:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:43:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-21 17:43:22,646 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-21 17:43:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:43:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:43:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:43:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:43:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:43:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:43:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:43:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:43:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:43:22,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:43:22,794 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:43:22,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:43:23,115 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:43:23,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:43:23,122 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 17:43:23,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:43:23 BoogieIcfgContainer [2022-07-21 17:43:23,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:43:23,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:43:23,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:43:23,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:43:23,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:43:21" (1/3) ... [2022-07-21 17:43:23,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49cf8f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:43:23, skipping insertion in model container [2022-07-21 17:43:23,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:22" (2/3) ... [2022-07-21 17:43:23,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49cf8f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:43:23, skipping insertion in model container [2022-07-21 17:43:23,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:43:23" (3/3) ... [2022-07-21 17:43:23,131 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2022-07-21 17:43:23,143 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:43:23,153 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2022-07-21 17:43:23,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:43:23,213 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@4f676f20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5919d0d8 [2022-07-21 17:43:23,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-07-21 17:43:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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) [2022-07-21 17:43:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:43:23,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:23,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:23,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348631, now seen corresponding path program 1 times [2022-07-21 17:43:23,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:23,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139904750] [2022-07-21 17:43:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:23,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139904750] [2022-07-21 17:43:23,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139904750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:23,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:23,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:43:23,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448564845] [2022-07-21 17:43:23,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:23,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:43:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:43:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:23,493 INFO L87 Difference]: Start difference. First operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:23,581 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-07-21 17:43:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:43:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:43:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:23,591 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:43:23,592 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:43:23,593 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 [2022-07-21 17:43:23,597 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:23,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:43:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:43:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-21 17:43:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.88) internal successors, (94), 87 states have internal predecessors, (94), 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) [2022-07-21 17:43:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-07-21 17:43:23,635 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 7 [2022-07-21 17:43:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-07-21 17:43:23,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-07-21 17:43:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:43:23,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:23,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:43:23,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348632, now seen corresponding path program 1 times [2022-07-21 17:43:23,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466183023] [2022-07-21 17:43:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:23,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:23,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466183023] [2022-07-21 17:43:23,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466183023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:23,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:23,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:43:23,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468463135] [2022-07-21 17:43:23,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:23,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:43:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:43:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:23,713 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:23,815 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-07-21 17:43:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:43:23,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:43:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:23,817 INFO L225 Difference]: With dead ends: 88 [2022-07-21 17:43:23,817 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:43:23,817 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 [2022-07-21 17:43:23,818 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:23,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:43:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:43:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-21 17:43:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.82) internal successors, (91), 84 states have internal predecessors, (91), 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) [2022-07-21 17:43:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-07-21 17:43:23,826 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 7 [2022-07-21 17:43:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:23,826 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-07-21 17:43:23,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-07-21 17:43:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:43:23,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:23,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:23,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:43:23,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash 927333361, now seen corresponding path program 1 times [2022-07-21 17:43:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:23,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935877800] [2022-07-21 17:43:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:24,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:24,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935877800] [2022-07-21 17:43:24,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935877800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:24,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:24,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:43:24,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202670707] [2022-07-21 17:43:24,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:24,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:43:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:43:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:43:24,037 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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) [2022-07-21 17:43:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:24,280 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2022-07-21 17:43:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:43:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 [2022-07-21 17:43:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:24,283 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:43:24,283 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:43:24,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:43:24,285 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 22 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:24,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 364 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:43:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:43:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-21 17:43:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.78) internal successors, (89), 82 states have internal predecessors, (89), 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) [2022-07-21 17:43:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-07-21 17:43:24,298 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 14 [2022-07-21 17:43:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:24,298 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-07-21 17:43:24,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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) [2022-07-21 17:43:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-07-21 17:43:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:43:24,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:24,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:24,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:43:24,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash 927333360, now seen corresponding path program 1 times [2022-07-21 17:43:24,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759226957] [2022-07-21 17:43:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:24,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:24,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759226957] [2022-07-21 17:43:24,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759226957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:24,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:24,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:43:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76073673] [2022-07-21 17:43:24,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:43:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:43:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:43:24,412 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-07-21 17:43:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:24,612 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-07-21 17:43:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:43:24,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 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 [2022-07-21 17:43:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:24,614 INFO L225 Difference]: With dead ends: 89 [2022-07-21 17:43:24,614 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 17:43:24,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:43:24,628 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 15 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:24,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 316 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:43:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 17:43:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2022-07-21 17:43:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.74) internal successors, (87), 80 states have internal predecessors, (87), 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) [2022-07-21 17:43:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2022-07-21 17:43:24,634 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 14 [2022-07-21 17:43:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:24,634 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2022-07-21 17:43:24,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-07-21 17:43:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2022-07-21 17:43:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:43:24,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:24,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:24,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:43:24,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1763306156, now seen corresponding path program 1 times [2022-07-21 17:43:24,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:24,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684404537] [2022-07-21 17:43:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:24,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 17:43:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:24,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:24,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684404537] [2022-07-21 17:43:24,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684404537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:24,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:24,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:43:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231364626] [2022-07-21 17:43:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:43:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:43:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:43:24,721 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 17:43:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:24,799 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-07-21 17:43:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:43:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2022-07-21 17:43:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:24,805 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:43:24,805 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 17:43:24,805 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 [2022-07-21 17:43:24,810 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:24,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 211 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:43:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 17:43:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-21 17:43:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 81 states have internal predecessors, (88), 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) [2022-07-21 17:43:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-07-21 17:43:24,828 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 16 [2022-07-21 17:43:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:24,828 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-07-21 17:43:24,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 17:43:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-07-21 17:43:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:43:24,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:24,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:24,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:43:24,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:24,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash 958467140, now seen corresponding path program 1 times [2022-07-21 17:43:24,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:24,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842139199] [2022-07-21 17:43:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:24,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:24,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842139199] [2022-07-21 17:43:24,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842139199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:24,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:24,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:43:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585535571] [2022-07-21 17:43:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:24,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:43:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:43:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:43:24,915 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-07-21 17:43:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:24,988 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-07-21 17:43:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:43:24,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 17 [2022-07-21 17:43:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:24,991 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:43:24,991 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:43:24,991 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 [2022-07-21 17:43:24,997 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:24,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 207 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:43:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:43:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-07-21 17:43:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 85 states have internal predecessors, (92), 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) [2022-07-21 17:43:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-07-21 17:43:25,009 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 17 [2022-07-21 17:43:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:25,009 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-07-21 17:43:25,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-07-21 17:43:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-07-21 17:43:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:43:25,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:25,010 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, 1] [2022-07-21 17:43:25,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 17:43:25,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash 239866037, now seen corresponding path program 1 times [2022-07-21 17:43:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:25,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856544684] [2022-07-21 17:43:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:25,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 17:43:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:43:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856544684] [2022-07-21 17:43:25,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856544684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:25,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988678051] [2022-07-21 17:43:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:25,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:25,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:25,163 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) [2022-07-21 17:43:25,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:43:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:43:25,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:25,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:43:25,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988678051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:43:25,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:43:25,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-07-21 17:43:25,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890057830] [2022-07-21 17:43:25,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:43:25,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:43:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:43:25,372 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:25,455 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-07-21 17:43:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:43:25,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-07-21 17:43:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:25,457 INFO L225 Difference]: With dead ends: 92 [2022-07-21 17:43:25,457 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 17:43:25,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:43:25,458 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 14 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:25,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:43:25,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 17:43:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-21 17:43:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 87 states have internal predecessors, (94), 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) [2022-07-21 17:43:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-21 17:43:25,470 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 31 [2022-07-21 17:43:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:25,471 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-21 17:43:25,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-21 17:43:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:43:25,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:25,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:25,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:25,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704317, now seen corresponding path program 1 times [2022-07-21 17:43:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483074765] [2022-07-21 17:43:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:25,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:25,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 17:43:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:43:25,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:25,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483074765] [2022-07-21 17:43:25,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483074765] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826795179] [2022-07-21 17:43:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:25,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:25,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:25,878 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) [2022-07-21 17:43:25,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:43:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:43:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:26,053 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 [2022-07-21 17:43:26,206 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:43:26,207 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 [2022-07-21 17:43:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:26,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826795179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:26,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:26,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-07-21 17:43:26,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228654345] [2022-07-21 17:43:26,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:26,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:43:26,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:43:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:43:26,284 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-21 17:43:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:26,565 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-07-21 17:43:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:43:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 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 32 [2022-07-21 17:43:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:26,566 INFO L225 Difference]: With dead ends: 103 [2022-07-21 17:43:26,567 INFO L226 Difference]: Without dead ends: 103 [2022-07-21 17:43:26,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:43:26,567 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 146 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:26,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 317 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 359 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-07-21 17:43:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-21 17:43:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2022-07-21 17:43:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.631578947368421) internal successors, (93), 86 states have internal predecessors, (93), 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) [2022-07-21 17:43:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2022-07-21 17:43:26,570 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 32 [2022-07-21 17:43:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:26,571 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2022-07-21 17:43:26,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-21 17:43:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2022-07-21 17:43:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:43:26,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:26,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:26,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:26,779 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,SelfDestructingSolverStorable7 [2022-07-21 17:43:26,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:26,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704316, now seen corresponding path program 1 times [2022-07-21 17:43:26,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:26,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459868034] [2022-07-21 17:43:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:26,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:26,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 17:43:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:43:26,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459868034] [2022-07-21 17:43:26,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459868034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967944839] [2022-07-21 17:43:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:26,997 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) [2022-07-21 17:43:27,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:43:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:43:27,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:27,150 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 [2022-07-21 17:43:27,363 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-07-21 17:43:27,364 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 14 treesize of output 13 [2022-07-21 17:43:27,386 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:43:27,386 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 [2022-07-21 17:43:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:27,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:27,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967944839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:27,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:27,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-07-21 17:43:27,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031580732] [2022-07-21 17:43:27,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:27,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:43:27,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:27,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:43:27,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:43:27,546 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:43:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:28,071 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-07-21 17:43:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:43:28,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-21 17:43:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:28,072 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:43:28,072 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:43:28,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:43:28,073 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:28,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 515 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:43:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:43:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-07-21 17:43:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 85 states have internal predecessors, (92), 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) [2022-07-21 17:43:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-07-21 17:43:28,075 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 32 [2022-07-21 17:43:28,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:28,076 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-07-21 17:43:28,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:43:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-07-21 17:43:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 17:43:28,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:28,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:28,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:28,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:28,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1122646220, now seen corresponding path program 2 times [2022-07-21 17:43:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:28,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471842592] [2022-07-21 17:43:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:28,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:28,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 17:43:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:28,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 17:43:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:43:28,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:28,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471842592] [2022-07-21 17:43:28,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471842592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:28,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782215301] [2022-07-21 17:43:28,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:43:28,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:28,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:28,394 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) [2022-07-21 17:43:28,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:43:28,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:43:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:43:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:43:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:43:28,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:43:28,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782215301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:43:28,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:43:28,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-07-21 17:43:28,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481342309] [2022-07-21 17:43:28,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:28,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:43:28,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:28,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:43:28,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:43:28,615 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:28,745 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-07-21 17:43:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:43:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-07-21 17:43:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:28,746 INFO L225 Difference]: With dead ends: 90 [2022-07-21 17:43:28,747 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 17:43:28,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:43:28,748 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 144 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:28,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 355 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:43:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 17:43:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-21 17:43:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 85 states have internal predecessors, (91), 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) [2022-07-21 17:43:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-07-21 17:43:28,751 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 46 [2022-07-21 17:43:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:28,751 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-07-21 17:43:28,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-07-21 17:43:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:43:28,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:28,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:28,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:28,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:28,959 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 186649324, now seen corresponding path program 1 times [2022-07-21 17:43:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501010053] [2022-07-21 17:43:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:29,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:29,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 17:43:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:29,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 17:43:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:43:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:29,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501010053] [2022-07-21 17:43:29,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501010053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:29,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340346928] [2022-07-21 17:43:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:29,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:29,196 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) [2022-07-21 17:43:29,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:43:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:43:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:29,375 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 [2022-07-21 17:43:29,393 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 [2022-07-21 17:43:29,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:29,447 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 9 [2022-07-21 17:43:29,571 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:43:29,571 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 [2022-07-21 17:43:29,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:29,720 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-07-21 17:43:29,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-07-21 17:43:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:43:29,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:29,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340346928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:29,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:29,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2022-07-21 17:43:29,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651094072] [2022-07-21 17:43:29,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:29,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:43:29,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:43:29,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:43:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:43:29,933 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:43:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:30,255 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-07-21 17:43:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:43:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2022-07-21 17:43:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:30,256 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:43:30,256 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:43:30,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:43:30,258 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:30,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 420 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 300 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-07-21 17:43:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:43:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2022-07-21 17:43:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 83 states have internal predecessors, (89), 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) [2022-07-21 17:43:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-07-21 17:43:30,262 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 47 [2022-07-21 17:43:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:30,262 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-07-21 17:43:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:43:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-07-21 17:43:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:43:30,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:30,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:30,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:30,479 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,SelfDestructingSolverStorable10 [2022-07-21 17:43:30,480 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash 186649325, now seen corresponding path program 1 times [2022-07-21 17:43:30,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:43:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590972741] [2022-07-21 17:43:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:43:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:43:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:30,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 17:43:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:30,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 17:43:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 17:43:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:43:30,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590972741] [2022-07-21 17:43:30,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590972741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8837002] [2022-07-21 17:43:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:30,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:30,738 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) [2022-07-21 17:43:30,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:43:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:30,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:43:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:30,941 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 [2022-07-21 17:43:30,964 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 [2022-07-21 17:43:31,120 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-21 17:43:31,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:43:31,321 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 75629 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) [2022-07-21 17:43:31,323 INFO L158 Benchmark]: Toolchain (without parser) took 9370.98ms. Allocated memory was 48.2MB in the beginning and 125.8MB in the end (delta: 77.6MB). Free memory was 22.9MB in the beginning and 88.0MB in the end (delta: -65.1MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2022-07-21 17:43:31,323 INFO L158 Benchmark]: CDTParser took 1.12ms. Allocated memory is still 48.2MB. Free memory was 30.7MB in the beginning and 30.6MB in the end (delta: 54.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:43:31,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 481.82ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 22.7MB in the beginning and 34.6MB in the end (delta: -11.9MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2022-07-21 17:43:31,324 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.55ms. Allocated memory is still 58.7MB. Free memory was 34.6MB in the beginning and 32.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:43:31,324 INFO L158 Benchmark]: Boogie Preprocessor took 62.92ms. Allocated memory is still 58.7MB. Free memory was 32.4MB in the beginning and 42.2MB in the end (delta: -9.8MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2022-07-21 17:43:31,324 INFO L158 Benchmark]: RCFGBuilder took 555.95ms. Allocated memory is still 58.7MB. Free memory was 42.2MB in the beginning and 37.1MB in the end (delta: 5.1MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-07-21 17:43:31,325 INFO L158 Benchmark]: TraceAbstraction took 8197.41ms. Allocated memory was 58.7MB in the beginning and 125.8MB in the end (delta: 67.1MB). Free memory was 36.6MB in the beginning and 88.0MB in the end (delta: -51.4MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2022-07-21 17:43:31,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12ms. Allocated memory is still 48.2MB. Free memory was 30.7MB in the beginning and 30.6MB in the end (delta: 54.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 481.82ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 22.7MB in the beginning and 34.6MB in the end (delta: -11.9MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.55ms. Allocated memory is still 58.7MB. Free memory was 34.6MB in the beginning and 32.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.92ms. Allocated memory is still 58.7MB. Free memory was 32.4MB in the beginning and 42.2MB in the end (delta: -9.8MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * RCFGBuilder took 555.95ms. Allocated memory is still 58.7MB. Free memory was 42.2MB in the beginning and 37.1MB in the end (delta: 5.1MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8197.41ms. Allocated memory was 58.7MB in the beginning and 125.8MB in the end (delta: 67.1MB). Free memory was 36.6MB in the beginning and 88.0MB in the end (delta: -51.4MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 75629 column 46: unknown constant v_#length_BEFORE_CALL_4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 75629 column 46: unknown constant v_#length_BEFORE_CALL_4: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 17:43:31,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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/dll2n_append_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 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:43:33,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:43:33,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:43:33,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:43:33,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:43:33,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:43:33,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:43:33,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:43:33,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:43:33,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:43:33,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:43:33,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:43:33,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:43:33,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:43:33,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:43:33,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:43:33,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:43:33,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:43:33,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:43:33,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:43:33,222 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:43:33,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:43:33,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:43:33,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:43:33,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:43:33,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:43:33,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:43:33,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:43:33,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:43:33,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:43:33,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:43:33,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:43:33,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:43:33,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:43:33,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:43:33,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:43:33,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:43:33,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:43:33,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:43:33,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:43:33,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:43:33,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:43:33,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:43:33,279 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:43:33,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:43:33,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:43:33,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:43:33,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:43:33,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:43:33,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:43:33,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:43:33,283 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:43:33,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:43:33,284 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:43:33,285 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:43:33,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:43:33,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:43:33,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:43:33,285 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:43:33,286 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:43:33,286 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:43:33,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:43:33,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:43:33,287 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:43:33,287 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:43:33,287 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:43:33,287 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:43:33,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:43:33,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:43:33,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:43:33,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:43:33,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:43:33,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:43:33,289 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:43:33,289 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:43:33,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:43:33,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2022-07-21 17:43:33,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:43:33,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:43:33,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:43:33,658 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:43:33,659 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:43:33,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2022-07-21 17:43:33,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/725bfdf81/07d8e5dafc0944c29ce2bf47d4a1ce48/FLAGca7356539 [2022-07-21 17:43:34,301 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:43:34,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2022-07-21 17:43:34,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/725bfdf81/07d8e5dafc0944c29ce2bf47d4a1ce48/FLAGca7356539 [2022-07-21 17:43:34,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/725bfdf81/07d8e5dafc0944c29ce2bf47d4a1ce48 [2022-07-21 17:43:34,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:43:34,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:43:34,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:43:34,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:43:34,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:43:34,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:43:34" (1/1) ... [2022-07-21 17:43:34,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ddb356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:34, skipping insertion in model container [2022-07-21 17:43:34,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:43:34" (1/1) ... [2022-07-21 17:43:34,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:43:34,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:43:34,980 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/dll2n_append_equal.i[24333,24346] [2022-07-21 17:43:34,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:43:35,001 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:43:35,043 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/dll2n_append_equal.i[24333,24346] [2022-07-21 17:43:35,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:43:35,075 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:43:35,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35 WrapperNode [2022-07-21 17:43:35,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:43:35,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:43:35,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:43:35,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:43:35,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,141 INFO L137 Inliner]: procedures = 130, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 126 [2022-07-21 17:43:35,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:43:35,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:43:35,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:43:35,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:43:35,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:43:35,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:43:35,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:43:35,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:43:35,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (1/1) ... [2022-07-21 17:43:35,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:43:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:43:35,239 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) [2022-07-21 17:43:35,245 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 [2022-07-21 17:43:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 17:43:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-21 17:43:35,290 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-21 17:43:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:43:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:43:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:43:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:43:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:43:35,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:43:35,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 17:43:35,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:43:35,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:43:35,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:43:35,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:43:35,460 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:43:35,461 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:43:35,950 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:43:35,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:43:35,957 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 17:43:35,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:43:35 BoogieIcfgContainer [2022-07-21 17:43:35,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:43:35,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:43:35,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:43:35,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:43:35,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:43:34" (1/3) ... [2022-07-21 17:43:35,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0bfb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:43:35, skipping insertion in model container [2022-07-21 17:43:35,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:43:35" (2/3) ... [2022-07-21 17:43:35,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0bfb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:43:35, skipping insertion in model container [2022-07-21 17:43:35,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:43:35" (3/3) ... [2022-07-21 17:43:35,968 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2022-07-21 17:43:35,983 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:43:35,984 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2022-07-21 17:43:36,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:43:36,045 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@2cc2bb69, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c27a5aa [2022-07-21 17:43:36,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-07-21 17:43:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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) [2022-07-21 17:43:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:43:36,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:36,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:36,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348631, now seen corresponding path program 1 times [2022-07-21 17:43:36,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:36,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771456604] [2022-07-21 17:43:36,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:36,082 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) [2022-07-21 17:43:36,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:43:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:36,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:43:36,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:36,235 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 [2022-07-21 17:43:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:36,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:43:36,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:36,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771456604] [2022-07-21 17:43:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771456604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:36,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:36,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:43:36,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856115640] [2022-07-21 17:43:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:36,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:43:36,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:43:36,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:36,297 INFO L87 Difference]: Start difference. First operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:36,459 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-07-21 17:43:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:43:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:43:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:36,469 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:43:36,470 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:43:36,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:36,474 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:36,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:43:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:43:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-21 17:43:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.88) internal successors, (94), 87 states have internal predecessors, (94), 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) [2022-07-21 17:43:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-07-21 17:43:36,521 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 7 [2022-07-21 17:43:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:36,521 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-07-21 17:43:36,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-07-21 17:43:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:43:36,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:36,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:36,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:36,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:36,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:36,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348632, now seen corresponding path program 1 times [2022-07-21 17:43:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048494387] [2022-07-21 17:43:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:36,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:36,736 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) [2022-07-21 17:43:36,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:43:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:43:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:36,823 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 [2022-07-21 17:43:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:36,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:43:36,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048494387] [2022-07-21 17:43:36,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048494387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:36,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:36,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:43:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451342191] [2022-07-21 17:43:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:36,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:43:36,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:43:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:36,851 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:37,040 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-07-21 17:43:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:43:37,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:43:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:37,046 INFO L225 Difference]: With dead ends: 88 [2022-07-21 17:43:37,046 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:43:37,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:37,047 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:37,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:43:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:43:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-21 17:43:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.82) internal successors, (91), 84 states have internal predecessors, (91), 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) [2022-07-21 17:43:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-07-21 17:43:37,055 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 7 [2022-07-21 17:43:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:37,055 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-07-21 17:43:37,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:43:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-07-21 17:43:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:43:37,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:37,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:37,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:37,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:37,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash 927333361, now seen corresponding path program 1 times [2022-07-21 17:43:37,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:37,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136367725] [2022-07-21 17:43:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:37,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:37,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:37,269 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) [2022-07-21 17:43:37,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:43:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:37,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:43:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:37,366 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 [2022-07-21 17:43:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:37,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:43:37,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:37,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136367725] [2022-07-21 17:43:37,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136367725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:37,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:37,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:43:37,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074186731] [2022-07-21 17:43:37,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:37,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:43:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:43:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:43:37,483 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-21 17:43:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:37,904 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2022-07-21 17:43:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:43:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2022-07-21 17:43:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:37,907 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:43:37,907 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:43:37,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:43:37,908 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 16 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:37,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 299 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:43:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:43:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-21 17:43:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.78) internal successors, (89), 82 states have internal predecessors, (89), 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) [2022-07-21 17:43:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-07-21 17:43:37,925 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 14 [2022-07-21 17:43:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:37,926 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-07-21 17:43:37,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-21 17:43:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-07-21 17:43:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:43:37,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:37,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:37,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-21 17:43:38,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:38,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash 927333360, now seen corresponding path program 1 times [2022-07-21 17:43:38,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:38,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566512026] [2022-07-21 17:43:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:38,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:38,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:38,141 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) [2022-07-21 17:43:38,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:43:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:43:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:38,235 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 [2022-07-21 17:43:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:38,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:43:38,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:38,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566512026] [2022-07-21 17:43:38,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566512026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:38,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:38,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:43:38,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265483094] [2022-07-21 17:43:38,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:38,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:43:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:38,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:43:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:43:38,292 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-21 17:43:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:38,593 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-07-21 17:43:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:43:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2022-07-21 17:43:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:38,595 INFO L225 Difference]: With dead ends: 89 [2022-07-21 17:43:38,595 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 17:43:38,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:43:38,596 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 14 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:38,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 283 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:43:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 17:43:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2022-07-21 17:43:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.74) internal successors, (87), 80 states have internal predecessors, (87), 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) [2022-07-21 17:43:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2022-07-21 17:43:38,609 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 14 [2022-07-21 17:43:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:38,609 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2022-07-21 17:43:38,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-21 17:43:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2022-07-21 17:43:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:43:38,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:38,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:38,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:38,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1763306156, now seen corresponding path program 1 times [2022-07-21 17:43:38,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:38,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478517421] [2022-07-21 17:43:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:38,823 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) [2022-07-21 17:43:38,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:43:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:43:38,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:38,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:43:38,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:38,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478517421] [2022-07-21 17:43:38,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478517421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:38,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:38,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:43:38,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918911725] [2022-07-21 17:43:38,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:38,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:43:38,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:43:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:38,923 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 17:43:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:38,934 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-07-21 17:43:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:43:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2022-07-21 17:43:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:38,937 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:43:38,937 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 17:43:38,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:38,939 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 177 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 [2022-07-21 17:43:38,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 177 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:43:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 17:43:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-21 17:43:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 81 states have internal predecessors, (88), 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) [2022-07-21 17:43:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-07-21 17:43:38,958 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 16 [2022-07-21 17:43:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:38,958 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-07-21 17:43:38,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 17:43:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-07-21 17:43:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:43:38,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:38,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:38,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:39,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash 958467140, now seen corresponding path program 1 times [2022-07-21 17:43:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854494291] [2022-07-21 17:43:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:39,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:39,172 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) [2022-07-21 17:43:39,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:43:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:39,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:43:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:39,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:43:39,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854494291] [2022-07-21 17:43:39,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854494291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:43:39,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:43:39,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:43:39,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078033450] [2022-07-21 17:43:39,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:43:39,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:43:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:43:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:39,283 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-07-21 17:43:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:39,311 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-07-21 17:43:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:43:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 17 [2022-07-21 17:43:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:39,312 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:43:39,312 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:43:39,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:43:39,314 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:39,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 172 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:43:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:43:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-07-21 17:43:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 85 states have internal predecessors, (92), 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) [2022-07-21 17:43:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-07-21 17:43:39,318 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 17 [2022-07-21 17:43:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:39,319 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-07-21 17:43:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-07-21 17:43:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-07-21 17:43:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:43:39,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:39,320 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, 1] [2022-07-21 17:43:39,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:39,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:39,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:39,535 INFO L85 PathProgramCache]: Analyzing trace with hash 239866037, now seen corresponding path program 1 times [2022-07-21 17:43:39,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:39,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167138267] [2022-07-21 17:43:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:39,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:39,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:39,536 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) [2022-07-21 17:43:39,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:43:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:43:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:39,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:43:39,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:39,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167138267] [2022-07-21 17:43:39,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167138267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:43:39,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:39,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-21 17:43:39,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407696720] [2022-07-21 17:43:39,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:39,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:43:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:43:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:43:39,757 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:39,782 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-07-21 17:43:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:43:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-07-21 17:43:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:39,785 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:43:39,786 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:43:39,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:43:39,787 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 31 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:39,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 270 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:43:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:43:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-07-21 17:43:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 87 states have internal predecessors, (94), 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) [2022-07-21 17:43:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-21 17:43:39,795 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 31 [2022-07-21 17:43:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:39,796 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-21 17:43:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-21 17:43:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:43:39,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:39,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:39,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:40,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:40,012 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704317, now seen corresponding path program 1 times [2022-07-21 17:43:40,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:40,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011041307] [2022-07-21 17:43:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:40,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:40,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:40,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:43:40,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:43:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:40,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:43:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:40,182 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 [2022-07-21 17:43:40,319 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:43:40,320 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 [2022-07-21 17:43:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:40,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:40,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:40,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011041307] [2022-07-21 17:43:40,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011041307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:43:40,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:40,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2022-07-21 17:43:40,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509912462] [2022-07-21 17:43:40,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:40,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:43:40,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:40,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:43:40,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:43:40,542 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-07-21 17:43:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:40,954 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-07-21 17:43:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:43:40,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 32 [2022-07-21 17:43:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:40,956 INFO L225 Difference]: With dead ends: 99 [2022-07-21 17:43:40,956 INFO L226 Difference]: Without dead ends: 99 [2022-07-21 17:43:40,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:43:40,957 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 16 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:40,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 380 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 259 Invalid, 0 Unknown, 132 Unchecked, 0.3s Time] [2022-07-21 17:43:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-21 17:43:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-21 17:43:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.5625) internal successors, (100), 93 states have internal predecessors, (100), 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) [2022-07-21 17:43:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2022-07-21 17:43:40,967 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 32 [2022-07-21 17:43:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:40,968 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2022-07-21 17:43:40,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-07-21 17:43:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2022-07-21 17:43:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:43:40,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:40,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:40,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:41,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:41,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:41,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704316, now seen corresponding path program 1 times [2022-07-21 17:43:41,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:41,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995007451] [2022-07-21 17:43:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:41,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:41,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:41,185 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) [2022-07-21 17:43:41,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:43:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:43:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:41,372 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 [2022-07-21 17:43:41,379 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 [2022-07-21 17:43:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:43,631 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 [2022-07-21 17:43:43,642 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:43:43,642 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 [2022-07-21 17:43:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:43,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:48,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:48,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995007451] [2022-07-21 17:43:48,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995007451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:48,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [697791817] [2022-07-21 17:43:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:48,010 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:43:48,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:43:48,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:43:48,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-07-21 17:43:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:43:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:48,303 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 [2022-07-21 17:43:48,311 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 [2022-07-21 17:43:50,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:50,602 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 [2022-07-21 17:43:50,616 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:43:50,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-07-21 17:43:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:43:50,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:53,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [697791817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:53,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:53,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-21 17:43:53,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653663242] [2022-07-21 17:43:53,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:53,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:43:53,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:53,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:43:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=104, Unknown=3, NotChecked=0, Total=132 [2022-07-21 17:43:53,105 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-07-21 17:43:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:54,118 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-07-21 17:43:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:43:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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 32 [2022-07-21 17:43:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:54,119 INFO L225 Difference]: With dead ends: 99 [2022-07-21 17:43:54,120 INFO L226 Difference]: Without dead ends: 99 [2022-07-21 17:43:54,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=51, Invalid=218, Unknown=3, NotChecked=0, Total=272 [2022-07-21 17:43:54,122 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 12 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:54,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 349 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 375 Invalid, 0 Unknown, 54 Unchecked, 0.8s Time] [2022-07-21 17:43:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-21 17:43:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-07-21 17:43:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.546875) internal successors, (99), 92 states have internal predecessors, (99), 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) [2022-07-21 17:43:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-07-21 17:43:54,126 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 32 [2022-07-21 17:43:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:54,126 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-07-21 17:43:54,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-07-21 17:43:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-07-21 17:43:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 17:43:54,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:54,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:54,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:54,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:54,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:54,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1122646220, now seen corresponding path program 2 times [2022-07-21 17:43:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:54,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722476350] [2022-07-21 17:43:54,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:43:54,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:54,535 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) [2022-07-21 17:43:54,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:43:54,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:43:54,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:43:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:43:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:43:54,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:43:55,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722476350] [2022-07-21 17:43:55,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722476350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:43:55,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:55,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 17:43:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060178220] [2022-07-21 17:43:55,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:55,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:43:55,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:43:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:43:55,007 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:43:55,422 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-07-21 17:43:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:43:55,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-07-21 17:43:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:43:55,433 INFO L225 Difference]: With dead ends: 98 [2022-07-21 17:43:55,433 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 17:43:55,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:43:55,434 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 144 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:43:55,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 327 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:43:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 17:43:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-21 17:43:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.53125) internal successors, (98), 92 states have internal predecessors, (98), 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) [2022-07-21 17:43:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2022-07-21 17:43:55,437 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 46 [2022-07-21 17:43:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:43:55,438 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2022-07-21 17:43:55,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:43:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2022-07-21 17:43:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:43:55,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:43:55,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:43:55,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:43:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:43:55,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:43:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:43:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash 186649324, now seen corresponding path program 1 times [2022-07-21 17:43:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:43:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667702555] [2022-07-21 17:43:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:55,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:43:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:43:55,643 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) [2022-07-21 17:43:55,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:43:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:43:55,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:55,969 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 [2022-07-21 17:43:56,009 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 [2022-07-21 17:43:56,199 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:43:56,200 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 [2022-07-21 17:43:56,254 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 [2022-07-21 17:43:56,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:56,369 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 [2022-07-21 17:43:56,657 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:43:56,657 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 [2022-07-21 17:43:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:43:56,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:57,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:43:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667702555] [2022-07-21 17:43:57,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667702555] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61048597] [2022-07-21 17:43:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:43:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:43:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:43:57,064 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:43:57,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-21 17:43:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:43:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:43:57,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:43:57,489 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:43:57,490 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 [2022-07-21 17:43:57,572 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:43:57,573 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 [2022-07-21 17:43:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:57,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:57,704 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:43:57,704 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 [2022-07-21 17:43:57,914 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:43:57,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-21 17:43:58,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:58,133 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:43:58,134 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 [2022-07-21 17:43:58,509 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:43:58,510 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 [2022-07-21 17:43:58,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:43:58,655 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:43:58,656 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 [2022-07-21 17:43:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:43:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:43:59,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61048597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:43:59,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:43:59,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-07-21 17:43:59,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424061692] [2022-07-21 17:43:59,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:43:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:43:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:43:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:43:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:43:59,006 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:44:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:01,769 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-07-21 17:44:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:44:01,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2022-07-21 17:44:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:01,771 INFO L225 Difference]: With dead ends: 100 [2022-07-21 17:44:01,771 INFO L226 Difference]: Without dead ends: 100 [2022-07-21 17:44:01,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:44:01,772 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:01,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 545 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 191 Unchecked, 0.5s Time] [2022-07-21 17:44:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-21 17:44:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-07-21 17:44:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.515625) internal successors, (97), 91 states have internal predecessors, (97), 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) [2022-07-21 17:44:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2022-07-21 17:44:01,775 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 47 [2022-07-21 17:44:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:01,776 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2022-07-21 17:44:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:44:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2022-07-21 17:44:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:44:01,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:01,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:01,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:01,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:02,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:02,186 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash 186649325, now seen corresponding path program 1 times [2022-07-21 17:44:02,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:02,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677322796] [2022-07-21 17:44:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:02,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:02,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:02,188 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) [2022-07-21 17:44:02,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:44:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:44:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:02,518 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 [2022-07-21 17:44:02,530 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 [2022-07-21 17:44:02,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-21 17:44:02,593 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 [2022-07-21 17:44:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:04,767 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 [2022-07-21 17:44:04,778 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:44:04,779 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 11 treesize of output 11 [2022-07-21 17:44:04,874 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 [2022-07-21 17:44:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:07,023 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 [2022-07-21 17:44:07,398 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:44:07,398 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 [2022-07-21 17:44:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:44:07,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:07,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677322796] [2022-07-21 17:44:07,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677322796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1234605625] [2022-07-21 17:44:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:07,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:44:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:44:07,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:44:07,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-07-21 17:44:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:44:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:08,385 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 [2022-07-21 17:44:08,405 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 [2022-07-21 17:44:08,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:08,541 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 [2022-07-21 17:44:08,673 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 [2022-07-21 17:44:10,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:10,870 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 [2022-07-21 17:44:11,039 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 [2022-07-21 17:44:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:11,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-21 17:44:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:44:11,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:11,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1234605625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:11,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:44:11,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 15 [2022-07-21 17:44:11,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671412611] [2022-07-21 17:44:11,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:11,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:44:11,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:11,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:44:11,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2022-07-21 17:44:11,200 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:44:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:11,708 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-07-21 17:44:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:44:11,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-07-21 17:44:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:11,709 INFO L225 Difference]: With dead ends: 97 [2022-07-21 17:44:11,709 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 17:44:11,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=59, Invalid=280, Unknown=3, NotChecked=0, Total=342 [2022-07-21 17:44:11,710 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 10 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:11,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 345 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-07-21 17:44:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 17:44:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-07-21 17:44:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.5) internal successors, (96), 90 states have internal predecessors, (96), 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) [2022-07-21 17:44:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-07-21 17:44:11,713 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 47 [2022-07-21 17:44:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:11,714 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-07-21 17:44:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:44:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-07-21 17:44:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:44:11,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:11,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:11,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:11,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-21 17:44:12,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:12,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1018625491, now seen corresponding path program 1 times [2022-07-21 17:44:12,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:12,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427445254] [2022-07-21 17:44:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:12,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:12,126 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:44:12,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:44:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 17:44:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 17:44:12,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:12,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:12,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427445254] [2022-07-21 17:44:12,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427445254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:12,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:12,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:44:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281448517] [2022-07-21 17:44:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:12,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:44:12,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:12,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:44:12,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:44:12,316 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:44:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:12,487 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-07-21 17:44:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:44:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-07-21 17:44:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:12,489 INFO L225 Difference]: With dead ends: 106 [2022-07-21 17:44:12,489 INFO L226 Difference]: Without dead ends: 106 [2022-07-21 17:44:12,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:44:12,490 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 55 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:12,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 83 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:44:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-21 17:44:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2022-07-21 17:44:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.46875) internal successors, (94), 88 states have internal predecessors, (94), 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) [2022-07-21 17:44:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-07-21 17:44:12,493 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 49 [2022-07-21 17:44:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:12,494 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-07-21 17:44:12,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:44:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-07-21 17:44:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:44:12,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:12,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:12,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:12,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:12,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1018625490, now seen corresponding path program 1 times [2022-07-21 17:44:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:12,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926802968] [2022-07-21 17:44:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:12,702 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) [2022-07-21 17:44:12,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 17:44:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:44:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 17:44:12,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:12,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:12,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926802968] [2022-07-21 17:44:12,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926802968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:12,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:12,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:44:12,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176838239] [2022-07-21 17:44:12,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:12,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:44:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:44:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:44:12,956 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-21 17:44:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:13,053 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-07-21 17:44:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:44:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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 49 [2022-07-21 17:44:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:13,054 INFO L225 Difference]: With dead ends: 92 [2022-07-21 17:44:13,054 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 17:44:13,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:44:13,055 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 172 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:13,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:44:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 17:44:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-21 17:44:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.4375) internal successors, (92), 86 states have internal predecessors, (92), 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) [2022-07-21 17:44:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2022-07-21 17:44:13,058 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 49 [2022-07-21 17:44:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:13,059 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2022-07-21 17:44:13,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-21 17:44:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2022-07-21 17:44:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:44:13,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:13,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:13,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:13,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:13,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 353447346, now seen corresponding path program 1 times [2022-07-21 17:44:13,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:13,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877588566] [2022-07-21 17:44:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:13,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:13,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:13,265 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:44:13,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 17:44:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 17:44:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:13,663 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 [2022-07-21 17:44:13,766 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 [2022-07-21 17:44:13,856 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 11 treesize of output 7 [2022-07-21 17:44:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:14,183 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 [2022-07-21 17:44:14,227 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-21 17:44:14,227 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 23 treesize of output 34 [2022-07-21 17:44:14,363 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 27 treesize of output 15 [2022-07-21 17:44:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:44:14,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:14,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:14,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877588566] [2022-07-21 17:44:14,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877588566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740996076] [2022-07-21 17:44:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:14,669 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:44:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:44:14,670 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:44:14,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-21 17:44:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:44:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:15,211 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 [2022-07-21 17:44:15,646 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 11 treesize of output 7 [2022-07-21 17:44:15,961 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-21 17:44:15,961 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 23 treesize of output 34 [2022-07-21 17:44:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:15,972 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 27 treesize of output 27 [2022-07-21 17:44:16,179 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 [2022-07-21 17:44:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:44:16,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740996076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:16,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:44:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-21 17:44:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398407887] [2022-07-21 17:44:16,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:44:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:44:16,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:44:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=602, Unknown=5, NotChecked=0, Total=702 [2022-07-21 17:44:16,432 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:44:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:17,658 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2022-07-21 17:44:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:44:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2022-07-21 17:44:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:17,659 INFO L225 Difference]: With dead ends: 125 [2022-07-21 17:44:17,659 INFO L226 Difference]: Without dead ends: 125 [2022-07-21 17:44:17,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=958, Unknown=9, NotChecked=0, Total=1122 [2022-07-21 17:44:17,660 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 65 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:17,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 796 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 530 Invalid, 0 Unknown, 170 Unchecked, 0.9s Time] [2022-07-21 17:44:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-21 17:44:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2022-07-21 17:44:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 85 states have internal predecessors, (92), 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) [2022-07-21 17:44:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-07-21 17:44:17,663 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 51 [2022-07-21 17:44:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:17,664 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-07-21 17:44:17,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:44:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-07-21 17:44:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:44:17,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:17,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:17,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:17,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:18,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:18,065 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash 353447347, now seen corresponding path program 1 times [2022-07-21 17:44:18,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:18,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438402751] [2022-07-21 17:44:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:18,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:18,067 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:44:18,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 17:44:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 17:44:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:18,453 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 [2022-07-21 17:44:18,460 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 [2022-07-21 17:44:18,624 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 [2022-07-21 17:44:18,629 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 [2022-07-21 17:44:18,779 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 21 treesize of output 13 [2022-07-21 17:44:18,785 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 [2022-07-21 17:44:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:19,109 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 [2022-07-21 17:44:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:19,129 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 27 treesize of output 27 [2022-07-21 17:44:19,150 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:44:19,150 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 17 treesize of output 17 [2022-07-21 17:44:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:19,162 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 [2022-07-21 17:44:19,266 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 [2022-07-21 17:44:19,272 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 [2022-07-21 17:44:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:44:19,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:19,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:19,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438402751] [2022-07-21 17:44:19,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438402751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:19,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1934845621] [2022-07-21 17:44:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:44:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:44:19,890 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:44:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-07-21 17:44:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 17:44:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:20,412 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 [2022-07-21 17:44:20,418 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 [2022-07-21 17:44:20,921 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 21 treesize of output 13 [2022-07-21 17:44:20,928 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 [2022-07-21 17:44:21,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:21,225 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 [2022-07-21 17:44:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:21,239 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 27 treesize of output 27 [2022-07-21 17:44:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:21,253 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 [2022-07-21 17:44:21,269 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:44:21,269 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 17 treesize of output 17 [2022-07-21 17:44:21,434 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 [2022-07-21 17:44:21,439 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 [2022-07-21 17:44:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:44:21,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:21,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1934845621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:21,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:44:21,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-21 17:44:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665310391] [2022-07-21 17:44:21,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:44:21,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:44:21,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:44:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=747, Unknown=18, NotChecked=0, Total=870 [2022-07-21 17:44:21,891 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:44:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:22,995 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-07-21 17:44:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:44:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2022-07-21 17:44:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:22,996 INFO L225 Difference]: With dead ends: 133 [2022-07-21 17:44:22,996 INFO L226 Difference]: Without dead ends: 133 [2022-07-21 17:44:22,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=166, Invalid=1144, Unknown=22, NotChecked=0, Total=1332 [2022-07-21 17:44:22,997 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 72 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:22,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 689 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 376 Invalid, 0 Unknown, 106 Unchecked, 0.6s Time] [2022-07-21 17:44:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-21 17:44:23,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 94. [2022-07-21 17:44:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 88 states have internal predecessors, (95), 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) [2022-07-21 17:44:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2022-07-21 17:44:23,001 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 51 [2022-07-21 17:44:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:23,001 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2022-07-21 17:44:23,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:44:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2022-07-21 17:44:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:44:23,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:23,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:23,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:23,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:23,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:23,408 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash 353294446, now seen corresponding path program 1 times [2022-07-21 17:44:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:23,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922332356] [2022-07-21 17:44:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:23,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:23,410 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:44:23,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 17:44:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:23,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:44:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 17:44:23,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:23,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922332356] [2022-07-21 17:44:23,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922332356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:23,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:23,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:44:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955647027] [2022-07-21 17:44:23,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:44:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:44:23,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:44:23,623 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-07-21 17:44:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:23,745 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2022-07-21 17:44:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:44:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 51 [2022-07-21 17:44:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:23,746 INFO L225 Difference]: With dead ends: 104 [2022-07-21 17:44:23,746 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 17:44:23,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:44:23,747 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 111 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:23,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:44:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 17:44:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2022-07-21 17:44:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 86 states have internal predecessors, (93), 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) [2022-07-21 17:44:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2022-07-21 17:44:23,750 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 51 [2022-07-21 17:44:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:23,750 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2022-07-21 17:44:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-07-21 17:44:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2022-07-21 17:44:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:44:23,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:23,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:23,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:23,952 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash 353294447, now seen corresponding path program 1 times [2022-07-21 17:44:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:23,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725078519] [2022-07-21 17:44:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:23,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:23,956 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) [2022-07-21 17:44:23,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:44:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:44:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 17:44:24,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:24,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725078519] [2022-07-21 17:44:24,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725078519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:24,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:24,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:44:24,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896432754] [2022-07-21 17:44:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:24,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:44:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:44:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:44:24,302 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-07-21 17:44:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:24,447 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-07-21 17:44:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:44:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 51 [2022-07-21 17:44:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:24,448 INFO L225 Difference]: With dead ends: 90 [2022-07-21 17:44:24,448 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 17:44:24,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:44:24,449 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 149 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:24,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 86 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:44:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 17:44:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-21 17:44:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.338235294117647) internal successors, (91), 84 states have internal predecessors, (91), 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) [2022-07-21 17:44:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-07-21 17:44:24,452 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 51 [2022-07-21 17:44:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:24,452 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-07-21 17:44:24,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-07-21 17:44:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-07-21 17:44:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:44:24,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:24,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:24,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:24,653 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1709893007, now seen corresponding path program 1 times [2022-07-21 17:44:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:24,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452864123] [2022-07-21 17:44:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:24,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:24,655 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) [2022-07-21 17:44:24,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:44:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:24,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:44:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:24,859 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 [2022-07-21 17:44:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:44:24,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:24,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:24,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452864123] [2022-07-21 17:44:24,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452864123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:24,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:24,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:44:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653914391] [2022-07-21 17:44:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:44:24,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:44:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:44:24,906 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-07-21 17:44:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:25,185 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2022-07-21 17:44:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:44:25,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 54 [2022-07-21 17:44:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:25,186 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:44:25,186 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:44:25,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:44:25,187 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:25,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 188 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:44:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:44:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2022-07-21 17:44:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 83 states have internal predecessors, (90), 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) [2022-07-21 17:44:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2022-07-21 17:44:25,191 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 54 [2022-07-21 17:44:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:25,191 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2022-07-21 17:44:25,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-07-21 17:44:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2022-07-21 17:44:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:44:25,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:25,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:25,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-21 17:44:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:25,392 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1709893006, now seen corresponding path program 1 times [2022-07-21 17:44:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58870484] [2022-07-21 17:44:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:25,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:25,395 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) [2022-07-21 17:44:25,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:44:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:44:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:25,671 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 [2022-07-21 17:44:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:44:25,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:25,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:25,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58870484] [2022-07-21 17:44:25,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58870484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:25,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:25,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:44:25,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453072302] [2022-07-21 17:44:25,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:25,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:44:25,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:25,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:44:25,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:44:25,789 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-07-21 17:44:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:26,048 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-07-21 17:44:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:44:26,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 54 [2022-07-21 17:44:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:26,049 INFO L225 Difference]: With dead ends: 88 [2022-07-21 17:44:26,050 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:44:26,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:44:26,050 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 45 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:26,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 187 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:44:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:44:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-21 17:44:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 82 states have internal predecessors, (89), 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) [2022-07-21 17:44:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-07-21 17:44:26,054 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 54 [2022-07-21 17:44:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:26,054 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-07-21 17:44:26,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-07-21 17:44:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-07-21 17:44:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:44:26,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:26,055 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:26,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:26,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:26,270 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1969948792, now seen corresponding path program 1 times [2022-07-21 17:44:26,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:26,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323813515] [2022-07-21 17:44:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:26,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:26,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:26,272 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) [2022-07-21 17:44:26,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:44:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:26,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:44:26,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:26,496 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 [2022-07-21 17:44:26,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:44:26,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:44:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:44:26,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:26,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:26,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323813515] [2022-07-21 17:44:26,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323813515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:26,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:26,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:44:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403987108] [2022-07-21 17:44:26,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:26,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:44:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:26,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:44:26,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:44:26,614 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 10 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 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) [2022-07-21 17:44:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:27,198 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-07-21 17:44:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:44:27,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 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 54 [2022-07-21 17:44:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:27,200 INFO L225 Difference]: With dead ends: 149 [2022-07-21 17:44:27,200 INFO L226 Difference]: Without dead ends: 149 [2022-07-21 17:44:27,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:44:27,201 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 162 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:27,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 306 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:44:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-21 17:44:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 92. [2022-07-21 17:44:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 86 states have internal predecessors, (95), 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) [2022-07-21 17:44:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-07-21 17:44:27,204 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 54 [2022-07-21 17:44:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:27,205 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-07-21 17:44:27,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 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) [2022-07-21 17:44:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-07-21 17:44:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:44:27,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:27,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:27,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:27,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1969948791, now seen corresponding path program 1 times [2022-07-21 17:44:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:27,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034843224] [2022-07-21 17:44:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:27,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:27,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:27,420 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) [2022-07-21 17:44:27,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:44:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:27,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:44:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:27,680 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 [2022-07-21 17:44:27,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:44:27,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:44:27,851 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 [2022-07-21 17:44:27,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:44:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:44:27,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:27,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034843224] [2022-07-21 17:44:27,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034843224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:27,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:27,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:44:27,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664780345] [2022-07-21 17:44:27,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:27,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:44:27,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:44:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:44:27,896 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 10 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 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) [2022-07-21 17:44:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:28,525 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2022-07-21 17:44:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:44:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 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 54 [2022-07-21 17:44:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:28,527 INFO L225 Difference]: With dead ends: 139 [2022-07-21 17:44:28,527 INFO L226 Difference]: Without dead ends: 139 [2022-07-21 17:44:28,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:44:28,528 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 150 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:28,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 320 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:44:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-21 17:44:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 94. [2022-07-21 17:44:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 88 states have internal predecessors, (97), 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) [2022-07-21 17:44:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2022-07-21 17:44:28,531 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 54 [2022-07-21 17:44:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:28,532 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2022-07-21 17:44:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 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) [2022-07-21 17:44:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2022-07-21 17:44:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:44:28,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:28,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:28,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:28,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:28,748 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1467023000, now seen corresponding path program 1 times [2022-07-21 17:44:28,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:28,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925868177] [2022-07-21 17:44:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:28,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:28,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:28,751 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) [2022-07-21 17:44:28,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 17:44:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:29,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 17:44:29,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:29,085 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 [2022-07-21 17:44:29,365 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:44:29,365 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 19 treesize of output 26 [2022-07-21 17:44:29,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:44:29,582 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:44:29,582 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 60 treesize of output 57 [2022-07-21 17:44:29,588 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 12 treesize of output 11 [2022-07-21 17:44:29,890 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:44:29,890 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 42 treesize of output 30 [2022-07-21 17:44:29,896 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 14 treesize of output 10 [2022-07-21 17:44:29,902 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 [2022-07-21 17:44:30,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:30,278 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:44:30,278 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 48 treesize of output 46 [2022-07-21 17:44:30,335 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-21 17:44:30,336 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 37 treesize of output 66 [2022-07-21 17:44:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:30,349 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 [2022-07-21 17:44:30,561 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 [2022-07-21 17:44:30,908 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:44:30,908 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 75 treesize of output 43 [2022-07-21 17:44:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:44:31,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:31,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925868177] [2022-07-21 17:44:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925868177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [251076045] [2022-07-21 17:44:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:31,713 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:44:31,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:44:31,714 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:44:31,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-21 17:44:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:32,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 17:44:32,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:32,268 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 [2022-07-21 17:44:32,653 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:44:32,653 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 19 treesize of output 26 [2022-07-21 17:44:32,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:44:33,114 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:44:33,114 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 48 treesize of output 47 [2022-07-21 17:44:33,636 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:44:33,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 21 [2022-07-21 17:44:33,642 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 [2022-07-21 17:44:34,272 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-21 17:44:34,273 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 37 treesize of output 66 [2022-07-21 17:44:34,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:34,316 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:44:34,317 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 70 treesize of output 60 [2022-07-21 17:44:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:34,335 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 [2022-07-21 17:44:34,647 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 [2022-07-21 17:44:35,114 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:44:35,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 34 [2022-07-21 17:44:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:44:35,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:35,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [251076045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:35,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:44:35,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2022-07-21 17:44:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296549112] [2022-07-21 17:44:35,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:44:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 17:44:35,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 17:44:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2607, Unknown=13, NotChecked=0, Total=2862 [2022-07-21 17:44:35,982 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:44:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:38,177 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-07-21 17:44:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:44:38,178 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2022-07-21 17:44:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:38,179 INFO L225 Difference]: With dead ends: 97 [2022-07-21 17:44:38,179 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 17:44:38,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=348, Invalid=3666, Unknown=18, NotChecked=0, Total=4032 [2022-07-21 17:44:38,180 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:38,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 852 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 487 Invalid, 0 Unknown, 287 Unchecked, 1.0s Time] [2022-07-21 17:44:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 17:44:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-07-21 17:44:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 90 states have internal predecessors, (100), 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) [2022-07-21 17:44:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-07-21 17:44:38,184 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 55 [2022-07-21 17:44:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:38,184 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-07-21 17:44:38,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:44:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-07-21 17:44:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:44:38,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:38,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:38,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:38,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:38,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:38,592 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1467022999, now seen corresponding path program 1 times [2022-07-21 17:44:38,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:38,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001799380] [2022-07-21 17:44:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:38,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:38,594 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) [2022-07-21 17:44:38,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 17:44:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 17:44:38,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:38,957 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 [2022-07-21 17:44:38,963 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 [2022-07-21 17:44:39,344 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:44:39,345 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 [2022-07-21 17:44:39,378 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:44:39,378 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 19 treesize of output 26 [2022-07-21 17:44:39,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:44:39,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:44:39,696 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:44:39,696 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 60 treesize of output 57 [2022-07-21 17:44:39,703 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 22 treesize of output 24 [2022-07-21 17:44:40,073 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:44:40,074 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 69 treesize of output 45 [2022-07-21 17:44:40,090 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:44:40,090 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 [2022-07-21 17:44:40,098 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 17 treesize of output 13 [2022-07-21 17:44:40,107 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 [2022-07-21 17:44:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:40,599 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:44:40,599 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 75 treesize of output 65 [2022-07-21 17:44:40,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:40,625 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:44:40,625 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 [2022-07-21 17:44:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:40,637 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 [2022-07-21 17:44:40,669 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:44:40,670 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 34 treesize of output 36 [2022-07-21 17:44:41,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:44:41,337 INFO L356 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2022-07-21 17:44:41,337 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 95 treesize of output 56 [2022-07-21 17:44:41,369 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-21 17:44:41,370 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 28 treesize of output 18 [2022-07-21 17:44:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:44:41,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:42,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:42,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001799380] [2022-07-21 17:44:42,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001799380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:42,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [577928093] [2022-07-21 17:44:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:42,682 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:44:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:44:42,683 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:44:42,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-07-21 17:44:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 17:44:43,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:43,328 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 [2022-07-21 17:44:43,333 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 [2022-07-21 17:44:44,018 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:44:44,018 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 [2022-07-21 17:44:44,044 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:44:44,045 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 19 treesize of output 26 [2022-07-21 17:44:44,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:44:44,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:44:44,566 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:44:44,567 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 60 treesize of output 57 [2022-07-21 17:44:44,572 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 22 treesize of output 24 [2022-07-21 17:44:45,205 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:44:45,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-07-21 17:44:45,216 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:44:45,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:44:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:45,536 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 [2022-07-21 17:44:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:45,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:45,558 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:44:45,559 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 [2022-07-21 17:44:45,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:45,591 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:44:45,592 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 75 treesize of output 65 [2022-07-21 17:44:45,634 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:44:45,635 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 34 treesize of output 36 [2022-07-21 17:44:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:44:46,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:44:46,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-07-21 17:44:46,487 INFO L356 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-07-21 17:44:46,487 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 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 17:44:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:44:46,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:47,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [577928093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:47,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:44:47,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2022-07-21 17:44:47,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860606931] [2022-07-21 17:44:47,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:44:47,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:44:47,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:47,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:44:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2058, Unknown=10, NotChecked=0, Total=2256 [2022-07-21 17:44:47,015 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 42 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 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) [2022-07-21 17:44:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:50,238 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2022-07-21 17:44:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:44:50,239 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 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 55 [2022-07-21 17:44:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:50,239 INFO L225 Difference]: With dead ends: 132 [2022-07-21 17:44:50,240 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 17:44:50,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=316, Invalid=3092, Unknown=14, NotChecked=0, Total=3422 [2022-07-21 17:44:50,241 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 92 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:50,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1262 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 815 Invalid, 0 Unknown, 354 Unchecked, 1.6s Time] [2022-07-21 17:44:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 17:44:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2022-07-21 17:44:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 92 states have internal predecessors, (102), 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) [2022-07-21 17:44:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2022-07-21 17:44:50,245 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 55 [2022-07-21 17:44:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:50,246 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2022-07-21 17:44:50,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 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) [2022-07-21 17:44:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2022-07-21 17:44:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:44:50,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:50,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:50,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:50,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:44:50,656 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash -938871693, now seen corresponding path program 1 times [2022-07-21 17:44:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:50,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002494624] [2022-07-21 17:44:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:50,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:50,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:50,658 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:44:50,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:44:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:44:50,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:50,989 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 [2022-07-21 17:44:51,005 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 16 treesize of output 8 [2022-07-21 17:44:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:44:51,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:44:51,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002494624] [2022-07-21 17:44:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002494624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:44:51,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:44:51,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:44:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159927124] [2022-07-21 17:44:51,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:44:51,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:44:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:44:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:44:51,031 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-07-21 17:44:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:51,430 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-07-21 17:44:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:44:51,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 55 [2022-07-21 17:44:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:51,431 INFO L225 Difference]: With dead ends: 126 [2022-07-21 17:44:51,431 INFO L226 Difference]: Without dead ends: 126 [2022-07-21 17:44:51,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:44:51,432 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 99 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:51,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 495 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:44:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-21 17:44:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2022-07-21 17:44:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 92 states have internal predecessors, (101), 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) [2022-07-21 17:44:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-07-21 17:44:51,436 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 55 [2022-07-21 17:44:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:51,436 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-07-21 17:44:51,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-07-21 17:44:51,436 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-07-21 17:44:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:44:51,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:51,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:51,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-21 17:44:51,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:44:51,643 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:51,644 INFO L85 PathProgramCache]: Analyzing trace with hash 959790642, now seen corresponding path program 1 times [2022-07-21 17:44:51,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:51,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237571721] [2022-07-21 17:44:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:51,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:51,646 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) [2022-07-21 17:44:51,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 17:44:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:44:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:52,216 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 [2022-07-21 17:44:52,311 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 8 treesize of output 4 [2022-07-21 17:44:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:52,560 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 15 treesize of output 17 [2022-07-21 17:44:52,623 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 16 treesize of output 8 [2022-07-21 17:44:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:44:52,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:52,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:44:52,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237571721] [2022-07-21 17:44:52,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237571721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1784852131] [2022-07-21 17:44:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:44:52,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:44:52,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:44:52,752 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) [2022-07-21 17:44:52,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-21 17:44:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:44:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:44:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:53,764 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 8 treesize of output 4 [2022-07-21 17:44:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:54,112 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 15 treesize of output 17 [2022-07-21 17:44:54,185 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 16 treesize of output 8 [2022-07-21 17:44:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:44:54,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:44:54,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1784852131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:44:54,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:44:54,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-21 17:44:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040141111] [2022-07-21 17:44:54,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:44:54,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 17:44:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:44:54,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 17:44:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=998, Unknown=35, NotChecked=0, Total=1190 [2022-07-21 17:44:54,288 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:44:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:44:55,205 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-07-21 17:44:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:44:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2022-07-21 17:44:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:44:55,206 INFO L225 Difference]: With dead ends: 102 [2022-07-21 17:44:55,207 INFO L226 Difference]: Without dead ends: 102 [2022-07-21 17:44:55,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=260, Invalid=1585, Unknown=47, NotChecked=0, Total=1892 [2022-07-21 17:44:55,208 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 61 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:44:55,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 671 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-07-21 17:44:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-21 17:44:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2022-07-21 17:44:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 84 states have internal predecessors, (91), 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) [2022-07-21 17:44:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-07-21 17:44:55,211 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 56 [2022-07-21 17:44:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:44:55,211 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-07-21 17:44:55,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:44:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-07-21 17:44:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:44:55,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:44:55,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:44:55,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:55,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:44:55,626 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 [2022-07-21 17:44:55,626 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:44:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:44:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash -588248546, now seen corresponding path program 2 times [2022-07-21 17:44:55,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:44:55,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130913046] [2022-07-21 17:44:55,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:44:55,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:44:55,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:44:55,628 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) [2022-07-21 17:44:55,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 17:44:56,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:44:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:44:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 17:44:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:44:56,073 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 [2022-07-21 17:44:56,200 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 13 treesize of output 9 [2022-07-21 17:44:56,207 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 13 treesize of output 9 [2022-07-21 17:44:56,706 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:44:56,706 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 16 treesize of output 22 [2022-07-21 17:44:56,712 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 7 treesize of output 3 [2022-07-21 17:44:56,749 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:44:56,749 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 19 treesize of output 26 [2022-07-21 17:44:56,765 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 16 treesize of output 18 [2022-07-21 17:44:56,932 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 16 treesize of output 18 [2022-07-21 17:44:56,939 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 16 treesize of output 18 [2022-07-21 17:44:56,968 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 22 [2022-07-21 17:44:56,979 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 22 [2022-07-21 17:44:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:44:57,122 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:44:57,123 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 1 case distinctions, treesize of input 97 treesize of output 60 [2022-07-21 17:44:57,131 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 0 case distinctions, treesize of input 46 treesize of output 42 [2022-07-21 17:44:57,539 INFO L356 Elim1Store]: treesize reduction 11, result has 66.7 percent of original size [2022-07-21 17:44:57,539 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 65 [2022-07-21 17:44:57,555 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-21 17:44:57,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 10 [2022-07-21 17:44:57,562 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 17 treesize of output 13 [2022-07-21 17:44:58,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:58,095 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-21 17:44:58,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 82 [2022-07-21 17:44:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:58,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:44:58,124 INFO L356 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-07-21 17:44:58,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2022-07-21 17:44:58,154 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:44:58,154 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 34 treesize of output 36 [2022-07-21 17:44:59,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:44:59,090 INFO L356 Elim1Store]: treesize reduction 82, result has 29.3 percent of original size [2022-07-21 17:44:59,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 109 [2022-07-21 17:44:59,166 INFO L356 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-07-21 17:44:59,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 54 [2022-07-21 17:44:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:44:59,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:00,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:45:00,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130913046] [2022-07-21 17:45:00,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130913046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:00,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806964720] [2022-07-21 17:45:00,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:45:00,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:45:00,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:45:00,191 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:45:00,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-07-21 17:45:00,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:45:00,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:45:00,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-21 17:45:00,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:00,878 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 [2022-07-21 17:45:01,143 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 13 treesize of output 9 [2022-07-21 17:45:01,158 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 13 treesize of output 9 [2022-07-21 17:45:01,834 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:45:01,834 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 19 treesize of output 26 [2022-07-21 17:45:01,854 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 16 treesize of output 18 [2022-07-21 17:45:01,867 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 16 treesize of output 18 [2022-07-21 17:45:02,218 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 16 treesize of output 18 [2022-07-21 17:45:02,226 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 16 treesize of output 18 [2022-07-21 17:45:02,263 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 22 [2022-07-21 17:45:02,283 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 22 [2022-07-21 17:45:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:02,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:45:02,554 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:45:02,554 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 1 case distinctions, treesize of input 97 treesize of output 60 [2022-07-21 17:45:02,561 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 0 case distinctions, treesize of input 46 treesize of output 42 [2022-07-21 17:45:03,268 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:45:03,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 44 [2022-07-21 17:45:03,279 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:45:03,279 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2022-07-21 17:45:03,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:03,590 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-21 17:45:03,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 82 [2022-07-21 17:45:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:03,618 INFO L356 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-07-21 17:45:03,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2022-07-21 17:45:03,656 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:45:03,656 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 34 treesize of output 36 [2022-07-21 17:45:05,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:45:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:05,903 INFO L356 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2022-07-21 17:45:05,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 82 [2022-07-21 17:45:05,941 INFO L356 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-07-21 17:45:05,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 29 [2022-07-21 17:45:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:45:05,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:06,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806964720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:06,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:45:06,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 49 [2022-07-21 17:45:06,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422984327] [2022-07-21 17:45:06,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:06,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:45:06,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:45:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:45:06,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2716, Unknown=7, NotChecked=0, Total=2970 [2022-07-21 17:45:06,416 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 49 states, 47 states have (on average 1.702127659574468) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:45:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:08,763 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2022-07-21 17:45:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:45:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.702127659574468) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (6), 2 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 59 [2022-07-21 17:45:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:08,764 INFO L225 Difference]: With dead ends: 114 [2022-07-21 17:45:08,764 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 17:45:08,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 82 SyntacticMatches, 13 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=339, Invalid=3681, Unknown=12, NotChecked=0, Total=4032 [2022-07-21 17:45:08,766 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:08,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1005 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 597 Invalid, 0 Unknown, 366 Unchecked, 1.3s Time] [2022-07-21 17:45:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 17:45:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-07-21 17:45:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 104 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:45:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2022-07-21 17:45:08,770 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 59 [2022-07-21 17:45:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:08,770 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2022-07-21 17:45:08,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.702127659574468) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:45:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2022-07-21 17:45:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:45:08,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:08,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:08,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:08,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:09,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:45:09,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:45:09,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:09,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1935094492, now seen corresponding path program 1 times [2022-07-21 17:45:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:45:09,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314469993] [2022-07-21 17:45:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:09,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:45:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:45:09,181 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) [2022-07-21 17:45:09,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-21 17:45:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 17:45:09,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:09,812 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 [2022-07-21 17:45:10,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:10,047 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 [2022-07-21 17:45:10,444 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:45:10,444 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 [2022-07-21 17:45:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:10,511 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 [2022-07-21 17:45:10,633 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 24 treesize of output 12 [2022-07-21 17:45:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:45:10,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:45:10,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:45:10,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314469993] [2022-07-21 17:45:10,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314469993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:10,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:10,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-07-21 17:45:10,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754843996] [2022-07-21 17:45:10,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:10,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:45:10,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:45:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:45:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=468, Unknown=14, NotChecked=0, Total=552 [2022-07-21 17:45:10,759 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:45:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:11,418 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2022-07-21 17:45:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:45:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-07-21 17:45:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:11,419 INFO L225 Difference]: With dead ends: 127 [2022-07-21 17:45:11,419 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 17:45:11,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=688, Unknown=17, NotChecked=0, Total=812 [2022-07-21 17:45:11,420 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:11,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 375 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2022-07-21 17:45:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 17:45:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-21 17:45:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 118 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:45:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2022-07-21 17:45:11,424 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 59 [2022-07-21 17:45:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:11,424 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2022-07-21 17:45:11,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:45:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2022-07-21 17:45:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:45:11,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:11,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:11,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:11,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:45:11,639 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:45:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1935094491, now seen corresponding path program 1 times [2022-07-21 17:45:11,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:45:11,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719760917] [2022-07-21 17:45:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:11,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:45:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:45:11,644 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:45:11,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 17:45:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:45:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:12,246 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 [2022-07-21 17:45:12,382 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 [2022-07-21 17:45:12,386 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 [2022-07-21 17:45:12,624 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3347 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_3347) |c_#memory_$Pointer$.base|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((v_ArrVal_3348 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_node_create_#res#1.base| v_ArrVal_3348) |c_#memory_$Pointer$.offset|)) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-21 17:45:12,673 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:45:12,673 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 14 treesize of output 20 [2022-07-21 17:45:12,680 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 [2022-07-21 17:45:12,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:12,697 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 [2022-07-21 17:45:13,182 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:45:13,183 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 43 treesize of output 42 [2022-07-21 17:45:13,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:13,192 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 33 treesize of output 33 [2022-07-21 17:45:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:13,277 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 29 treesize of output 29 [2022-07-21 17:45:13,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:13,290 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 29 treesize of output 29 [2022-07-21 17:45:13,450 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 30 treesize of output 18 [2022-07-21 17:45:13,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-21 17:45:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2022-07-21 17:45:13,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:13,955 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-07-21 17:45:13,993 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2022-07-21 17:45:14,026 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:45:14,027 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 62 treesize of output 66 [2022-07-21 17:45:14,118 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|))) (or (forall ((v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_dll_append_~last~0#1.base|)) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2022-07-21 17:45:14,162 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_dll_append_#t~mem9#1.base|)) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_prenex_1) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv0 32)))) (forall ((v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_prenex_1) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) |c_ULTIMATE.start_dll_append_#t~mem9#1.offset|)))) is different from false [2022-07-21 17:45:14,208 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_prenex_1) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) (_ bv8 32)))) (or (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_prenex_1) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv0 32))) (forall ((v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3354) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_ArrVal_3353) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2022-07-21 17:45:14,302 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_prenex_1) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv0 32))) (forall ((v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3354) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_2 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_prenex_1) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) (_ bv8 32)))) (forall ((v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_ArrVal_3353) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3355) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2022-07-21 17:45:14,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:45:14,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719760917] [2022-07-21 17:45:14,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719760917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:14,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551523655] [2022-07-21 17:45:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:14,920 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:45:14,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:45:14,921 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:45:14,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-21 17:45:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 17:45:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:15,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-21 17:45:16,727 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:45:16,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2022-07-21 17:45:17,087 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 13 treesize of output 9 [2022-07-21 17:45:17,307 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:45:17,307 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 46 treesize of output 45 [2022-07-21 17:45:18,054 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:45:18,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 30 [2022-07-21 17:45:18,061 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 [2022-07-21 17:45:18,067 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 [2022-07-21 17:45:18,964 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:45:18,965 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 14 treesize of output 20 [2022-07-21 17:45:18,969 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 [2022-07-21 17:45:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:19,008 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:45:19,008 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 69 treesize of output 59 [2022-07-21 17:45:19,044 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:45:19,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 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 [2022-07-21 17:45:20,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:45:20,098 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:45:20,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 32 [2022-07-21 17:45:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:20,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:21,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1551523655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:21,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:45:21,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2022-07-21 17:45:21,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810081495] [2022-07-21 17:45:21,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:21,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:45:21,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:45:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:45:21,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2939, Unknown=58, NotChecked=812, Total=4032 [2022-07-21 17:45:21,286 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand has 49 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 41 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:45:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:25,746 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-07-21 17:45:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:45:25,746 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 41 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 59 [2022-07-21 17:45:25,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:25,747 INFO L225 Difference]: With dead ends: 120 [2022-07-21 17:45:25,747 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 17:45:25,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=403, Invalid=4802, Unknown=79, NotChecked=1036, Total=6320 [2022-07-21 17:45:25,749 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 37 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 564 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:25,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1160 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 644 Invalid, 0 Unknown, 564 Unchecked, 1.4s Time] [2022-07-21 17:45:25,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 17:45:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-21 17:45:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 111 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:45:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2022-07-21 17:45:25,752 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 59 [2022-07-21 17:45:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:25,753 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2022-07-21 17:45:25,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 41 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:45:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2022-07-21 17:45:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:45:25,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:25,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:25,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:25,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:45:26,168 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-07-21 17:45:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 592087770, now seen corresponding path program 1 times [2022-07-21 17:45:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:45:26,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573210968] [2022-07-21 17:45:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:26,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:45:26,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:45:26,170 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:45:26,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-21 17:45:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 17:45:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:26,678 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 [2022-07-21 17:45:26,683 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 [2022-07-21 17:45:26,713 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 [2022-07-21 17:45:26,717 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 [2022-07-21 17:45:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:28,814 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 [2022-07-21 17:45:28,823 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:45:28,823 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 [2022-07-21 17:45:28,896 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 [2022-07-21 17:45:31,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:31,072 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 [2022-07-21 17:45:31,463 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 16 treesize of output 8 [2022-07-21 17:45:31,468 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 [2022-07-21 17:45:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:34,119 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 22 treesize of output 22 [2022-07-21 17:45:34,160 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:45:34,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 17:45:35,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:45:35,009 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 [2022-07-21 17:45:35,541 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-21 17:45:35,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:35,791 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 31 treesize of output 29 [2022-07-21 17:45:36,024 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 32 treesize of output 16 [2022-07-21 17:45:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:36,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:36,676 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3608 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3609 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3608) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3609) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv1 1))) is different from false [2022-07-21 17:45:37,074 INFO L356 Elim1Store]: treesize reduction 5, result has 72.2 percent of original size [2022-07-21 17:45:37,074 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 21 [2022-07-21 17:45:38,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:45:38,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573210968] [2022-07-21 17:45:38,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573210968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1467512556] [2022-07-21 17:45:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:38,578 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:45:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:45:38,580 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:45:38,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-21 17:45:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:45:39,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:39,835 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 [2022-07-21 17:45:40,650 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 [2022-07-21 17:45:41,969 INFO L356 Elim1Store]: treesize reduction 58, result has 37.6 percent of original size [2022-07-21 17:45:41,969 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 55 [2022-07-21 17:45:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:42,663 INFO L356 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2022-07-21 17:45:42,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 95 [2022-07-21 17:45:42,672 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-21 17:45:42,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:42,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:45:43,073 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) 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) [2022-07-21 17:45:43,077 INFO L158 Benchmark]: Toolchain (without parser) took 128455.19ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 34.6MB in the beginning and 44.7MB in the end (delta: -10.1MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. [2022-07-21 17:45:43,077 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 56.6MB. Free memory was 38.6MB in the beginning and 38.6MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:45:43,078 INFO L158 Benchmark]: CACSL2BoogieTranslator took 453.29ms. Allocated memory is still 56.6MB. Free memory was 34.5MB in the beginning and 32.0MB in the end (delta: 2.5MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2022-07-21 17:45:43,078 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.36ms. Allocated memory is still 56.6MB. Free memory was 32.0MB in the beginning and 29.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:45:43,078 INFO L158 Benchmark]: Boogie Preprocessor took 61.15ms. Allocated memory is still 56.6MB. Free memory was 29.8MB in the beginning and 27.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:45:43,078 INFO L158 Benchmark]: RCFGBuilder took 754.31ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 27.7MB in the beginning and 42.7MB in the end (delta: -15.0MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. [2022-07-21 17:45:43,078 INFO L158 Benchmark]: TraceAbstraction took 127115.07ms. Allocated memory is still 77.6MB. Free memory was 42.1MB in the beginning and 44.7MB in the end (delta: -2.7MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2022-07-21 17:45:43,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 56.6MB. Free memory was 38.6MB in the beginning and 38.6MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 453.29ms. Allocated memory is still 56.6MB. Free memory was 34.5MB in the beginning and 32.0MB in the end (delta: 2.5MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.36ms. Allocated memory is still 56.6MB. Free memory was 32.0MB in the beginning and 29.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.15ms. Allocated memory is still 56.6MB. Free memory was 29.8MB in the beginning and 27.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 754.31ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 27.7MB in the beginning and 42.7MB in the end (delta: -15.0MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. * TraceAbstraction took 127115.07ms. Allocated memory is still 77.6MB. Free memory was 42.1MB in the beginning and 44.7MB in the end (delta: -2.7MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 17:45:43,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER