./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/sll2c_prepend_unequal.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 f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:22:55,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:22:55,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:22:55,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:22:55,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:22:55,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:22:55,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:22:55,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:22:55,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:22:55,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:22:55,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:22:55,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:22:55,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:22:55,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:22:55,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:22:55,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:22:55,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:22:55,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:22:55,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:22:55,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:22:55,588 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:22:55,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:22:55,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:22:55,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:22:55,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:22:55,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:22:55,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:22:55,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:22:55,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:22:55,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:22:55,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:22:55,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:22:55,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:22:55,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:22:55,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:22:55,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:22:55,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:22:55,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:22:55,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:22:55,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:22:55,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:22:55,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:22:55,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:22:55,628 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:22:55,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:22:55,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:22:55,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:22:55,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:22:55,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:22:55,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:22:55,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:22:55,630 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:22:55,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:22:55,631 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:22:55,631 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:22:55,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:22:55,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:22:55,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:22:55,632 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:22:55,632 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:22:55,632 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:22:55,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:22:55,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:22:55,633 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:22:55,633 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:22:55,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:22:55,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:22:55,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:22:55,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:22:55,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:22:55,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:22:55,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:22:55,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:22:55,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 [2022-07-20 06:22:55,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:22:55,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:22:55,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:22:55,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:22:55,824 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:22:55,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2022-07-20 06:22:55,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b74788c/b0476055f93b46e0af6fbdb9248d3083/FLAG59fb2715c [2022-07-20 06:22:56,280 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:22:56,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2022-07-20 06:22:56,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b74788c/b0476055f93b46e0af6fbdb9248d3083/FLAG59fb2715c [2022-07-20 06:22:56,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b74788c/b0476055f93b46e0af6fbdb9248d3083 [2022-07-20 06:22:56,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:22:56,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:22:56,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:22:56,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:22:56,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:22:56,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4a585d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56, skipping insertion in model container [2022-07-20 06:22:56,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:22:56,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:22:56,516 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/sll2c_prepend_unequal.i[24547,24560] [2022-07-20 06:22:56,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:22:56,522 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:22:56,575 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/sll2c_prepend_unequal.i[24547,24560] [2022-07-20 06:22:56,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:22:56,597 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:22:56,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56 WrapperNode [2022-07-20 06:22:56,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:22:56,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:22:56,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:22:56,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:22:56,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,652 INFO L137 Inliner]: procedures = 127, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2022-07-20 06:22:56,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:22:56,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:22:56,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:22:56,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:22:56,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:22:56,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:22:56,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:22:56,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:22:56,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (1/1) ... [2022-07-20 06:22:56,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:22:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:22:56,705 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) [2022-07-20 06:22:56,707 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 [2022-07-20 06:22:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:22:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:22:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-20 06:22:56,729 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-20 06:22:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:22:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:22:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:22:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:22:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:22:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:22:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 06:22:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:22:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:22:56,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:22:56,801 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:22:56,802 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:22:57,077 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:22:57,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:22:57,083 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 06:22:57,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:22:57 BoogieIcfgContainer [2022-07-20 06:22:57,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:22:57,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:22:57,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:22:57,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:22:57,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:22:56" (1/3) ... [2022-07-20 06:22:57,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed0afeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:22:57, skipping insertion in model container [2022-07-20 06:22:57,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:22:56" (2/3) ... [2022-07-20 06:22:57,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed0afeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:22:57, skipping insertion in model container [2022-07-20 06:22:57,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:22:57" (3/3) ... [2022-07-20 06:22:57,092 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_unequal.i [2022-07-20 06:22:57,101 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:22:57,102 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2022-07-20 06:22:57,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:22:57,146 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@43274308, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a0291cf [2022-07-20 06:22:57,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-07-20 06:22:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 122 states have internal predecessors, (136), 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) [2022-07-20 06:22:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:22:57,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:22:57,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:22:57,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:22:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:22:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash 895521621, now seen corresponding path program 1 times [2022-07-20 06:22:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:22:57,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707187294] [2022-07-20 06:22:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:57,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:22:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:22:57,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:22:57,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707187294] [2022-07-20 06:22:57,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707187294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:22:57,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:22:57,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:22:57,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45140669] [2022-07-20 06:22:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:22:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:22:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:22:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:22:57,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:22:57,361 INFO L87 Difference]: Start difference. First operand has 127 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 122 states have internal predecessors, (136), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:22:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:22:57,483 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2022-07-20 06:22:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:22:57,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 06:22:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:22:57,494 INFO L225 Difference]: With dead ends: 125 [2022-07-20 06:22:57,494 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 06:22:57,496 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 [2022-07-20 06:22:57,499 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:22:57,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 197 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:22:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 06:22:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-20 06:22:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.953125) internal successors, (125), 117 states have internal predecessors, (125), 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) [2022-07-20 06:22:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2022-07-20 06:22:57,539 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 6 [2022-07-20 06:22:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:22:57,540 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2022-07-20 06:22:57,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:22:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2022-07-20 06:22:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:22:57,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:22:57,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:22:57,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:22:57,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:22:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:22:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash 895521622, now seen corresponding path program 1 times [2022-07-20 06:22:57,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:22:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324203462] [2022-07-20 06:22:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:22:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:22:57,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:22:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324203462] [2022-07-20 06:22:57,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324203462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:22:57,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:22:57,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:22:57,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952813988] [2022-07-20 06:22:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:22:57,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:22:57,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:22:57,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:22:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:22:57,616 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:22:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:22:57,706 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2022-07-20 06:22:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:22:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 06:22:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:22:57,708 INFO L225 Difference]: With dead ends: 120 [2022-07-20 06:22:57,708 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 06:22:57,708 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 [2022-07-20 06:22:57,709 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:22:57,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 199 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:22:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 06:22:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-20 06:22:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.921875) internal successors, (123), 115 states have internal predecessors, (123), 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) [2022-07-20 06:22:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2022-07-20 06:22:57,722 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 6 [2022-07-20 06:22:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:22:57,723 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2022-07-20 06:22:57,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:22:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2022-07-20 06:22:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 06:22:57,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:22:57,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:22:57,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:22:57,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:22:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:22:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash 164994135, now seen corresponding path program 1 times [2022-07-20 06:22:57,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:22:57,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813195236] [2022-07-20 06:22:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:57,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:22:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:57,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:22:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:22:57,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:22:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813195236] [2022-07-20 06:22:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813195236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:22:57,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:22:57,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:22:57,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776221965] [2022-07-20 06:22:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:22:57,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:22:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:22:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:22:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:22:57,783 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-20 06:22:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:22:57,869 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-07-20 06:22:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:22:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 13 [2022-07-20 06:22:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:22:57,872 INFO L225 Difference]: With dead ends: 127 [2022-07-20 06:22:57,873 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 06:22:57,873 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 [2022-07-20 06:22:57,884 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 5 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:22:57,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 296 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:22:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 06:22:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-07-20 06:22:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 116 states have internal predecessors, (124), 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) [2022-07-20 06:22:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2022-07-20 06:22:57,902 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 13 [2022-07-20 06:22:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:22:57,902 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2022-07-20 06:22:57,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-20 06:22:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2022-07-20 06:22:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 06:22:57,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:22:57,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:22:57,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 06:22:57,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:22:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:22:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1546453220, now seen corresponding path program 1 times [2022-07-20 06:22:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:22:57,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275846088] [2022-07-20 06:22:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:22:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:22:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:22:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:22:58,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:22:58,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275846088] [2022-07-20 06:22:58,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275846088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:22:58,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:22:58,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:22:58,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589513684] [2022-07-20 06:22:58,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:22:58,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:22:58,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:22:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:22:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:22:58,073 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-07-20 06:22:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:22:58,256 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-07-20 06:22:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:22:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 22 [2022-07-20 06:22:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:22:58,266 INFO L225 Difference]: With dead ends: 121 [2022-07-20 06:22:58,267 INFO L226 Difference]: Without dead ends: 121 [2022-07-20 06:22:58,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:22:58,268 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 13 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:22:58,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 419 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:22:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-20 06:22:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-07-20 06:22:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 115 states have internal predecessors, (123), 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) [2022-07-20 06:22:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2022-07-20 06:22:58,288 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 22 [2022-07-20 06:22:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:22:58,288 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2022-07-20 06:22:58,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-07-20 06:22:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2022-07-20 06:22:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 06:22:58,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:22:58,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:22:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:22:58,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:22:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:22:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1546453219, now seen corresponding path program 1 times [2022-07-20 06:22:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:22:58,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818938846] [2022-07-20 06:22:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:22:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:22:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:22:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:22:58,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:22:58,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818938846] [2022-07-20 06:22:58,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818938846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:22:58,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:22:58,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:22:58,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646262806] [2022-07-20 06:22:58,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:22:58,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:22:58,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:22:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:22:58,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:22:58,410 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 06:22:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:22:58,587 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2022-07-20 06:22:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:22:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-20 06:22:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:22:58,590 INFO L225 Difference]: With dead ends: 120 [2022-07-20 06:22:58,590 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 06:22:58,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:22:58,591 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 11 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:22:58,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 443 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:22:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 06:22:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-20 06:22:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 65 states have (on average 1.876923076923077) internal successors, (122), 114 states have internal predecessors, (122), 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) [2022-07-20 06:22:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2022-07-20 06:22:58,595 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 22 [2022-07-20 06:22:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:22:58,595 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2022-07-20 06:22:58,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 06:22:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2022-07-20 06:22:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 06:22:58,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:22:58,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:22:58,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 06:22:58,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:22:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:22:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1726296005, now seen corresponding path program 1 times [2022-07-20 06:22:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:22:58,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998729403] [2022-07-20 06:22:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:58,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:22:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:22:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:22:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:22:58,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:22:58,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998729403] [2022-07-20 06:22:58,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998729403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:22:58,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058866287] [2022-07-20 06:22:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:58,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:22:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:22:58,732 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) [2022-07-20 06:22:58,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:22:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 06:22:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:22:58,889 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 [2022-07-20 06:22:58,988 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:22:58,988 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 [2022-07-20 06:22:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:22:59,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:22:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:22:59,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058866287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:22:59,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:22:59,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2022-07-20 06:22:59,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556609369] [2022-07-20 06:22:59,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:22:59,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 06:22:59,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:22:59,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 06:22:59,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-07-20 06:22:59,262 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 06:22:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:22:59,472 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2022-07-20 06:22:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:22:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-20 06:22:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:22:59,474 INFO L225 Difference]: With dead ends: 125 [2022-07-20 06:22:59,474 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 06:22:59,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:22:59,477 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 32 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:22:59,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 728 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 411 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-07-20 06:22:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 06:22:59,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-20 06:22:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 71 states have (on average 1.7887323943661972) internal successors, (127), 119 states have internal predecessors, (127), 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) [2022-07-20 06:22:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2022-07-20 06:22:59,486 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 25 [2022-07-20 06:22:59,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:22:59,486 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2022-07-20 06:22:59,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 06:22:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2022-07-20 06:22:59,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 06:22:59,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:22:59,487 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:22:59,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:22:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-20 06:22:59,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:22:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:22:59,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1726296006, now seen corresponding path program 1 times [2022-07-20 06:22:59,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:22:59,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280725937] [2022-07-20 06:22:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:59,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:22:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:22:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:22:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:22:59,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:22:59,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280725937] [2022-07-20 06:22:59,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280725937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:22:59,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015393778] [2022-07-20 06:22:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:22:59,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:22:59,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:22:59,880 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) [2022-07-20 06:22:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 06:22:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:22:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 06:22:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:22:59,961 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 [2022-07-20 06:23:00,152 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:23:00,153 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 [2022-07-20 06:23:00,158 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 11 [2022-07-20 06:23:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:23:00,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:23:00,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015393778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:00,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:23:00,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-07-20 06:23:00,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522738743] [2022-07-20 06:23:00,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:23:00,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 06:23:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 06:23:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:23:00,307 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 06:23:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:00,717 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2022-07-20 06:23:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:23:00,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-07-20 06:23:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:00,719 INFO L225 Difference]: With dead ends: 126 [2022-07-20 06:23:00,719 INFO L226 Difference]: Without dead ends: 126 [2022-07-20 06:23:00,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-07-20 06:23:00,720 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 126 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:00,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 706 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:23:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-20 06:23:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-07-20 06:23:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.7746478873239437) internal successors, (126), 118 states have internal predecessors, (126), 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) [2022-07-20 06:23:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2022-07-20 06:23:00,722 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 25 [2022-07-20 06:23:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:00,722 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2022-07-20 06:23:00,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 06:23:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2022-07-20 06:23:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:23:00,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:00,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:00,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-20 06:23:00,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1086704927, now seen corresponding path program 1 times [2022-07-20 06:23:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:00,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049208285] [2022-07-20 06:23:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:01,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:01,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:23:01,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049208285] [2022-07-20 06:23:01,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049208285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30055970] [2022-07-20 06:23:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:01,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:01,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:01,118 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) [2022-07-20 06:23:01,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 06:23:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 06:23:01,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:01,232 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 [2022-07-20 06:23:01,239 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 [2022-07-20 06:23:01,354 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:23:01,355 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 [2022-07-20 06:23:01,438 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:23:01,439 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 [2022-07-20 06:23:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 06:23:01,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:23:01,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30055970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:01,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:23:01,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2022-07-20 06:23:01,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464929899] [2022-07-20 06:23:01,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:23:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 06:23:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 06:23:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:23:01,710 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 06:23:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:01,928 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2022-07-20 06:23:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:23:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2022-07-20 06:23:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:01,929 INFO L225 Difference]: With dead ends: 138 [2022-07-20 06:23:01,929 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 06:23:01,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-07-20 06:23:01,929 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 263 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:01,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 452 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 308 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-07-20 06:23:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 06:23:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2022-07-20 06:23:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.6619718309859155) internal successors, (118), 110 states have internal predecessors, (118), 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) [2022-07-20 06:23:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2022-07-20 06:23:01,932 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 37 [2022-07-20 06:23:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:01,932 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2022-07-20 06:23:01,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 06:23:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2022-07-20 06:23:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:23:01,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:01,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:01,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:02,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:02,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1086704928, now seen corresponding path program 1 times [2022-07-20 06:23:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:02,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820560940] [2022-07-20 06:23:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:02,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 06:23:02,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:02,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820560940] [2022-07-20 06:23:02,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820560940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:23:02,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:23:02,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:23:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632130867] [2022-07-20 06:23:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:23:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:23:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:23:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:23:02,305 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:23:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:02,471 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2022-07-20 06:23:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:23:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 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 37 [2022-07-20 06:23:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:02,472 INFO L225 Difference]: With dead ends: 125 [2022-07-20 06:23:02,472 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 06:23:02,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:23:02,473 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 353 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:02,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 126 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:23:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 06:23:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2022-07-20 06:23:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 101 states have internal predecessors, (109), 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) [2022-07-20 06:23:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2022-07-20 06:23:02,476 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 37 [2022-07-20 06:23:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:02,476 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2022-07-20 06:23:02,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:23:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2022-07-20 06:23:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 06:23:02,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:02,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:02,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 06:23:02,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1436990998, now seen corresponding path program 1 times [2022-07-20 06:23:02,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:02,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950344603] [2022-07-20 06:23:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:02,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 06:23:02,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:02,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950344603] [2022-07-20 06:23:02,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950344603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:23:02,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:23:02,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:23:02,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198812772] [2022-07-20 06:23:02,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:23:02,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:23:02,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:02,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:23:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:23:02,572 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:23:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:02,701 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-07-20 06:23:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:23:02,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-20 06:23:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:02,702 INFO L225 Difference]: With dead ends: 123 [2022-07-20 06:23:02,702 INFO L226 Difference]: Without dead ends: 123 [2022-07-20 06:23:02,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:23:02,703 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 78 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:02,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 289 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:23:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-20 06:23:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2022-07-20 06:23:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.5070422535211268) internal successors, (107), 99 states have internal predecessors, (107), 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) [2022-07-20 06:23:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2022-07-20 06:23:02,705 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 40 [2022-07-20 06:23:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:02,706 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2022-07-20 06:23:02,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:23:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2022-07-20 06:23:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 06:23:02,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:02,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:02,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 06:23:02,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1436990997, now seen corresponding path program 1 times [2022-07-20 06:23:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:02,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493669026] [2022-07-20 06:23:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:02,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 06:23:02,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:02,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493669026] [2022-07-20 06:23:02,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493669026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:23:02,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:23:02,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:23:02,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676902676] [2022-07-20 06:23:02,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:23:02,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:23:02,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:02,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:23:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:23:02,801 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:23:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:02,925 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2022-07-20 06:23:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:23:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-20 06:23:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:02,926 INFO L225 Difference]: With dead ends: 103 [2022-07-20 06:23:02,926 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 06:23:02,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:23:02,927 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 79 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:02,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 304 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:23:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 06:23:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-20 06:23:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 97 states have internal predecessors, (105), 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) [2022-07-20 06:23:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-07-20 06:23:02,929 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 40 [2022-07-20 06:23:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:02,929 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-07-20 06:23:02,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:23:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-07-20 06:23:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 06:23:02,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:02,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:02,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 06:23:02,930 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1596801691, now seen corresponding path program 1 times [2022-07-20 06:23:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:02,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740263782] [2022-07-20 06:23:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:03,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:03,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:03,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 06:23:03,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740263782] [2022-07-20 06:23:03,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740263782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912184432] [2022-07-20 06:23:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:03,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:03,180 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) [2022-07-20 06:23:03,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 06:23:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:03,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 06:23:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:03,422 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 9 treesize of output 5 [2022-07-20 06:23:03,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:03,580 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 [2022-07-20 06:23:03,589 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 06:23:03,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:23:03,643 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 [2022-07-20 06:23:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:23:03,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:23:03,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912184432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:23:03,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:23:03,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2022-07-20 06:23:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430451829] [2022-07-20 06:23:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:23:03,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 06:23:03,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 06:23:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=622, Unknown=2, NotChecked=0, Total=702 [2022-07-20 06:23:03,658 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:23:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:03,961 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2022-07-20 06:23:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 06:23:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-20 06:23:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:03,963 INFO L225 Difference]: With dead ends: 154 [2022-07-20 06:23:03,963 INFO L226 Difference]: Without dead ends: 154 [2022-07-20 06:23:03,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=756, Unknown=2, NotChecked=0, Total=870 [2022-07-20 06:23:03,963 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 77 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:03,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 863 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 573 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-07-20 06:23:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-20 06:23:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 102. [2022-07-20 06:23:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 96 states have internal predecessors, (105), 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) [2022-07-20 06:23:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2022-07-20 06:23:03,966 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 41 [2022-07-20 06:23:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:03,966 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2022-07-20 06:23:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:23:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2022-07-20 06:23:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 06:23:03,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:03,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:03,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:04,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:04,171 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1596801690, now seen corresponding path program 1 times [2022-07-20 06:23:04,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:04,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789179943] [2022-07-20 06:23:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:04,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:04,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:23:04,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789179943] [2022-07-20 06:23:04,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789179943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:04,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56653973] [2022-07-20 06:23:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:04,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:04,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:04,617 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) [2022-07-20 06:23:04,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 06:23:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-20 06:23:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:04,791 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 [2022-07-20 06:23:05,036 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 19 treesize of output 11 [2022-07-20 06:23:05,041 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 [2022-07-20 06:23:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:05,222 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 [2022-07-20 06:23:05,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:05,227 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 [2022-07-20 06:23:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:05,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-20 06:23:05,237 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-20 06:23:05,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 06:23:05,276 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 [2022-07-20 06:23:05,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:23:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:23:05,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:23:05,493 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 Int) (|v_node_create_~temp~0#1.base_35| Int) (v_ArrVal_1163 (Array Int Int)) (v_ArrVal_1162 (Array Int Int))) (or (not (< |v_node_create_~temp~0#1.base_35| |c_#StackHeapBarrier|)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_35| v_ArrVal_1162) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (and (<= (+ .cse0 4) (select (store |c_#length| |v_node_create_~temp~0#1.base_35| v_ArrVal_1164) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_35| v_ArrVal_1163) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (<= 0 .cse0))) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_35|) 0)))) is different from false [2022-07-20 06:23:05,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56653973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:05,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:23:05,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2022-07-20 06:23:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519162261] [2022-07-20 06:23:05,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:23:05,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 06:23:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 06:23:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1153, Unknown=3, NotChecked=68, Total=1332 [2022-07-20 06:23:05,496 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 33 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:23:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:06,753 INFO L93 Difference]: Finished difference Result 164 states and 178 transitions. [2022-07-20 06:23:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 06:23:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2022-07-20 06:23:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:06,755 INFO L225 Difference]: With dead ends: 164 [2022-07-20 06:23:06,755 INFO L226 Difference]: Without dead ends: 164 [2022-07-20 06:23:06,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=2122, Unknown=7, NotChecked=94, Total=2450 [2022-07-20 06:23:06,756 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 190 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:06,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 2099 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1401 Invalid, 0 Unknown, 192 Unchecked, 0.7s Time] [2022-07-20 06:23:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-20 06:23:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 110. [2022-07-20 06:23:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 80 states have (on average 1.4125) internal successors, (113), 104 states have internal predecessors, (113), 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) [2022-07-20 06:23:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2022-07-20 06:23:06,760 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 41 [2022-07-20 06:23:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:06,760 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2022-07-20 06:23:06,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:23:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2022-07-20 06:23:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 06:23:06,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:06,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:06,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:06,968 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,SelfDestructingSolverStorable12 [2022-07-20 06:23:06,968 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2031121995, now seen corresponding path program 1 times [2022-07-20 06:23:06,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:06,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661966654] [2022-07-20 06:23:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:06,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 06:23:07,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:07,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661966654] [2022-07-20 06:23:07,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661966654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:23:07,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:23:07,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:23:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434498172] [2022-07-20 06:23:07,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:23:07,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:23:07,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:23:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:23:07,034 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:23:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:07,096 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-07-20 06:23:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:23:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-20 06:23:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:07,097 INFO L225 Difference]: With dead ends: 127 [2022-07-20 06:23:07,097 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 06:23:07,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:23:07,098 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 160 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:07,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 160 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:23:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 06:23:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2022-07-20 06:23:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.4) internal successors, (112), 103 states have internal predecessors, (112), 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) [2022-07-20 06:23:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2022-07-20 06:23:07,101 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 42 [2022-07-20 06:23:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:07,101 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2022-07-20 06:23:07,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:23:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2022-07-20 06:23:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 06:23:07,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:07,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:07,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 06:23:07,102 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1993086700, now seen corresponding path program 1 times [2022-07-20 06:23:07,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:07,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048507148] [2022-07-20 06:23:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:23:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:07,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048507148] [2022-07-20 06:23:07,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048507148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:07,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101538618] [2022-07-20 06:23:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:07,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:07,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:07,417 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) [2022-07-20 06:23:07,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 06:23:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 06:23:07,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:07,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-20 06:23:07,806 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1453 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1453) |c_#memory_$Pointer$.base|))) is different from true [2022-07-20 06:23:07,812 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1454 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1454) |c_#memory_$Pointer$.base|)))) is different from true [2022-07-20 06:23:07,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:07,827 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 24 treesize of output 24 [2022-07-20 06:23:07,858 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 [2022-07-20 06:23:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-07-20 06:23:07,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:23:07,942 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1458 (Array Int Int)) (|v_node_create_~temp~0#1.base_38| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_38| v_ArrVal_1458) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (or (<= 1 .cse0) (<= (+ .cse0 1) 0) (not (< |v_node_create_~temp~0#1.base_38| |c_#StackHeapBarrier|))))) is different from false [2022-07-20 06:23:07,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101538618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:07,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:23:07,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2022-07-20 06:23:07,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676198267] [2022-07-20 06:23:07,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:23:07,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 06:23:07,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:07,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 06:23:07,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=961, Unknown=3, NotChecked=192, Total=1260 [2022-07-20 06:23:07,945 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:23:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:08,638 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2022-07-20 06:23:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 06:23:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-07-20 06:23:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:08,640 INFO L225 Difference]: With dead ends: 108 [2022-07-20 06:23:08,640 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 06:23:08,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1629, Unknown=5, NotChecked=252, Total=2070 [2022-07-20 06:23:08,641 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:08,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1594 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 984 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-07-20 06:23:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 06:23:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2022-07-20 06:23:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.3717948717948718) internal successors, (107), 99 states have internal predecessors, (107), 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) [2022-07-20 06:23:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2022-07-20 06:23:08,643 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 44 [2022-07-20 06:23:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:08,643 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2022-07-20 06:23:08,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:23:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2022-07-20 06:23:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:23:08,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:08,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:08,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:08,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 06:23:08,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1144176968, now seen corresponding path program 1 times [2022-07-20 06:23:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:08,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218638296] [2022-07-20 06:23:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:08,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:09,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:09,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:23:09,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218638296] [2022-07-20 06:23:09,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218638296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309975507] [2022-07-20 06:23:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:09,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:09,407 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:23:09,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 06:23:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-20 06:23:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:09,600 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 [2022-07-20 06:23:09,775 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:23:09,775 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 [2022-07-20 06:23:09,855 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 [2022-07-20 06:23:09,969 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:23:09,969 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 28 treesize of output 29 [2022-07-20 06:23:10,096 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:23:10,096 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 39 treesize of output 22 [2022-07-20 06:23:10,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-07-20 06:23:10,204 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1622 (Array Int Int)) (v_ArrVal_1621 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1621) |c_#memory_$Pointer$.base|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1622)))) is different from true [2022-07-20 06:23:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:10,240 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:23:10,241 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 45 treesize of output 43 [2022-07-20 06:23:10,263 INFO L356 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2022-07-20 06:23:10,263 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 36 treesize of output 52 [2022-07-20 06:23:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:10,269 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 [2022-07-20 06:23:10,338 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 [2022-07-20 06:23:10,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:23:10,481 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:23:10,481 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 50 treesize of output 28 [2022-07-20 06:23:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-20 06:23:10,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:23:10,705 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1633 (Array Int Int)) (v_ArrVal_1632 (Array Int Int)) (v_ArrVal_1631 Int) (|v_node_create_~temp~0#1.base_41| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_41| v_ArrVal_1632) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (or (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_41|) 0)) (not (< |v_node_create_~temp~0#1.base_41| |c_#StackHeapBarrier|)) (< .cse0 0) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_41| v_ArrVal_1631) (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_41| v_ArrVal_1633))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) .cse0)) 1)))) is different from false [2022-07-20 06:23:10,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309975507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:10,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:23:10,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 46 [2022-07-20 06:23:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619651883] [2022-07-20 06:23:10,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:23:10,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 06:23:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 06:23:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2193, Unknown=2, NotChecked=190, Total=2550 [2022-07-20 06:23:10,708 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 47 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 40 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:23:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:11,647 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2022-07-20 06:23:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 06:23:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 40 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2022-07-20 06:23:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:11,648 INFO L225 Difference]: With dead ends: 127 [2022-07-20 06:23:11,648 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 06:23:11,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=287, Invalid=3379, Unknown=2, NotChecked=238, Total=3906 [2022-07-20 06:23:11,649 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:11,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1417 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 889 Invalid, 0 Unknown, 329 Unchecked, 0.4s Time] [2022-07-20 06:23:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 06:23:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-07-20 06:23:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 96 states have (on average 1.3333333333333333) internal successors, (128), 117 states have internal predecessors, (128), 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) [2022-07-20 06:23:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-07-20 06:23:11,652 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 46 [2022-07-20 06:23:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:11,652 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-07-20 06:23:11,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 40 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:23:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-07-20 06:23:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:23:11,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:11,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:23:11,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:11,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:11,862 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:11,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1144176969, now seen corresponding path program 1 times [2022-07-20 06:23:11,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:11,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962241501] [2022-07-20 06:23:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:11,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:12,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:12,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:12,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:23:12,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962241501] [2022-07-20 06:23:12,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962241501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564835092] [2022-07-20 06:23:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:12,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:23:12,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 06:23:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-20 06:23:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:13,026 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 [2022-07-20 06:23:13,311 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:23:13,312 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 [2022-07-20 06:23:13,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-20 06:23:13,412 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 [2022-07-20 06:23:13,547 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:23:13,548 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 47 treesize of output 44 [2022-07-20 06:23:13,551 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 [2022-07-20 06:23:13,739 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:23:13,740 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 79 treesize of output 38 [2022-07-20 06:23:13,744 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 10 [2022-07-20 06:23:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:13,983 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:23:13,983 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 85 treesize of output 75 [2022-07-20 06:23:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:13,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:13,991 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:23:13,991 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 83 treesize of output 80 [2022-07-20 06:23:14,014 INFO L356 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-07-20 06:23:14,014 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 32 treesize of output 34 [2022-07-20 06:23:14,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-20 06:23:14,246 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:23:14,246 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 83 treesize of output 42 [2022-07-20 06:23:14,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-07-20 06:23:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:23:14,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:23:14,591 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1811 (Array Int Int)) (v_ArrVal_1810 (Array Int Int)) (v_ArrVal_1809 Int) (|v_node_create_~temp~0#1.base_44| Int)) (or (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_44| v_ArrVal_1810)) (.cse1 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_44| v_ArrVal_1811))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (.cse3 (select (select .cse4 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (let ((.cse0 (select (select .cse4 .cse2) .cse3))) (and (<= (+ .cse0 4) (select (store |c_#length| |v_node_create_~temp~0#1.base_44| v_ArrVal_1809) (select (select .cse1 .cse2) .cse3))) (<= 0 .cse0))))) (not (< |v_node_create_~temp~0#1.base_44| |c_#StackHeapBarrier|)) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_44|) 0)))) is different from false [2022-07-20 06:23:14,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564835092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:14,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:23:14,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 55 [2022-07-20 06:23:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570277502] [2022-07-20 06:23:14,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:23:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 06:23:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 06:23:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3454, Unknown=5, NotChecked=118, Total=3782 [2022-07-20 06:23:14,594 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 56 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:23:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:16,500 INFO L93 Difference]: Finished difference Result 184 states and 202 transitions. [2022-07-20 06:23:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 06:23:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2022-07-20 06:23:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:16,501 INFO L225 Difference]: With dead ends: 184 [2022-07-20 06:23:16,501 INFO L226 Difference]: Without dead ends: 184 [2022-07-20 06:23:16,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=371, Invalid=5634, Unknown=5, NotChecked=152, Total=6162 [2022-07-20 06:23:16,503 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 97 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:16,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 2101 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1387 Invalid, 0 Unknown, 456 Unchecked, 0.7s Time] [2022-07-20 06:23:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-20 06:23:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 124. [2022-07-20 06:23:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 116 states have internal predecessors, (126), 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) [2022-07-20 06:23:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2022-07-20 06:23:16,506 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 46 [2022-07-20 06:23:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:16,506 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2022-07-20 06:23:16,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:23:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2022-07-20 06:23:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 06:23:16,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:16,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-20 06:23:16,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:16,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 06:23:16,726 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1589162821, now seen corresponding path program 2 times [2022-07-20 06:23:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:16,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670048344] [2022-07-20 06:23:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:16,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:17,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:17,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:17,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:23:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:17,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670048344] [2022-07-20 06:23:17,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670048344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:17,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032657450] [2022-07-20 06:23:17,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:23:17,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:17,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:17,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:23:17,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 06:23:17,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:23:17,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:23:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-20 06:23:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:17,583 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 [2022-07-20 06:23:17,815 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:23:17,816 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 [2022-07-20 06:23:17,898 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 [2022-07-20 06:23:17,901 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 [2022-07-20 06:23:18,017 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 06:23:18,017 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 47 treesize of output 33 [2022-07-20 06:23:18,020 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 [2022-07-20 06:23:36,412 INFO L356 Elim1Store]: treesize reduction 68, result has 27.7 percent of original size [2022-07-20 06:23:36,413 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 6 case distinctions, treesize of input 83 treesize of output 70 [2022-07-20 06:23:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:36,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:36,427 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-20 06:23:36,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 39 [2022-07-20 06:23:36,443 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-20 06:23:36,444 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 20 treesize of output 22 [2022-07-20 06:23:37,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:37,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:23:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:37,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:23:37,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:23:37,375 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:23:37,376 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 5 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 33 [2022-07-20 06:23:37,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:23:37,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:23:37,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:23:37,767 INFO L356 Elim1Store]: treesize reduction 142, result has 13.4 percent of original size [2022-07-20 06:23:37,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 60 [2022-07-20 06:23:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:23:37,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:23:38,018 INFO L356 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-07-20 06:23:38,019 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 24 treesize of output 23 [2022-07-20 06:23:38,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032657450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:38,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:23:38,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 62 [2022-07-20 06:23:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381889033] [2022-07-20 06:23:38,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:23:38,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 06:23:38,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:23:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 06:23:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4857, Unknown=9, NotChecked=0, Total=5112 [2022-07-20 06:23:38,627 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand has 63 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 56 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:23:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:23:54,667 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-07-20 06:23:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 06:23:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 56 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2022-07-20 06:23:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:23:54,672 INFO L225 Difference]: With dead ends: 151 [2022-07-20 06:23:54,672 INFO L226 Difference]: Without dead ends: 151 [2022-07-20 06:23:54,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=503, Invalid=8796, Unknown=13, NotChecked=0, Total=9312 [2022-07-20 06:23:54,674 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 87 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:23:54,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1558 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 968 Invalid, 0 Unknown, 343 Unchecked, 0.5s Time] [2022-07-20 06:23:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-20 06:23:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 130. [2022-07-20 06:23:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 101 states have (on average 1.3267326732673268) internal successors, (134), 122 states have internal predecessors, (134), 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) [2022-07-20 06:23:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2022-07-20 06:23:54,679 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 51 [2022-07-20 06:23:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:23:54,679 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2022-07-20 06:23:54,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 56 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:23:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2022-07-20 06:23:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 06:23:54,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:23:54,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-20 06:23:54,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 06:23:54,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 06:23:54,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:23:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:23:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1589162822, now seen corresponding path program 2 times [2022-07-20 06:23:54,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:23:54,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296359880] [2022-07-20 06:23:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:23:54,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:23:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:23:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:55,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:23:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:55,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:23:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:23:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:23:55,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:23:55,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296359880] [2022-07-20 06:23:55,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296359880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:23:55,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342463099] [2022-07-20 06:23:55,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:23:55,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:23:55,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:23:55,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:23:55,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 06:23:55,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:23:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:23:55,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 143 conjunts are in the unsatisfiable core [2022-07-20 06:23:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:23:55,789 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 [2022-07-20 06:23:56,069 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:23:56,070 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 [2022-07-20 06:23:56,179 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 [2022-07-20 06:23:56,189 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 [2022-07-20 06:23:56,315 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 06:23:56,316 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 56 treesize of output 38 [2022-07-20 06:23:56,320 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 22 [2022-07-20 06:24:00,829 INFO L356 Elim1Store]: treesize reduction 68, result has 27.7 percent of original size [2022-07-20 06:24:00,829 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 6 case distinctions, treesize of input 107 treesize of output 82 [2022-07-20 06:24:00,844 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-20 06:24:00,844 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 20 treesize of output 22 [2022-07-20 06:24:00,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:00,859 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-07-20 06:24:00,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 53 [2022-07-20 06:24:00,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:24:02,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:24:02,203 INFO L356 Elim1Store]: treesize reduction 126, result has 13.1 percent of original size [2022-07-20 06:24:02,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 90 [2022-07-20 06:24:02,218 INFO L356 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2022-07-20 06:24:02,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 31 [2022-07-20 06:24:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:24:02,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:24:03,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342463099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:24:03,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:24:03,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 59 [2022-07-20 06:24:03,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844874210] [2022-07-20 06:24:03,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:24:03,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-20 06:24:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:24:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-20 06:24:03,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4594, Unknown=2, NotChecked=0, Total=4830 [2022-07-20 06:24:03,439 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 59 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 52 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:24:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:24:13,648 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2022-07-20 06:24:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 06:24:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 52 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2022-07-20 06:24:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:24:13,649 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:24:13,649 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:24:13,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=489, Invalid=8435, Unknown=6, NotChecked=0, Total=8930 [2022-07-20 06:24:13,651 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 32 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:24:13,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1811 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 786 Invalid, 0 Unknown, 340 Unchecked, 0.4s Time] [2022-07-20 06:24:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:24:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-07-20 06:24:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 98 states have (on average 1.316326530612245) internal successors, (129), 119 states have internal predecessors, (129), 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) [2022-07-20 06:24:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2022-07-20 06:24:13,655 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 51 [2022-07-20 06:24:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:24:13,655 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2022-07-20 06:24:13,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 52 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:24:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2022-07-20 06:24:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 06:24:13,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:24:13,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:24:13,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 06:24:13,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:13,863 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:24:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:24:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1862680377, now seen corresponding path program 1 times [2022-07-20 06:24:13,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:24:13,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737879387] [2022-07-20 06:24:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:13,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:24:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:24:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:14,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:24:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:14,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:24:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:24:14,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:24:14,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737879387] [2022-07-20 06:24:14,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737879387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:24:14,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366786814] [2022-07-20 06:24:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:14,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:14,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:24:14,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:24:14,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 06:24:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 06:24:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:24:14,535 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 [2022-07-20 06:24:14,678 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 [2022-07-20 06:24:14,715 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:24:14,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2022-07-20 06:24:14,754 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:24:14,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-07-20 06:24:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 06:24:14,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:24:14,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366786814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:24:14,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:24:14,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 29 [2022-07-20 06:24:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672208357] [2022-07-20 06:24:14,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:24:14,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 06:24:14,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:24:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 06:24:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2022-07-20 06:24:14,760 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:24:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:24:14,953 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2022-07-20 06:24:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:24:14,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-07-20 06:24:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:24:14,954 INFO L225 Difference]: With dead ends: 146 [2022-07-20 06:24:14,954 INFO L226 Difference]: Without dead ends: 146 [2022-07-20 06:24:14,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 06:24:14,955 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 203 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:24:14,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 378 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 299 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-07-20 06:24:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-20 06:24:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 126. [2022-07-20 06:24:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 118 states have internal predecessors, (128), 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) [2022-07-20 06:24:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2022-07-20 06:24:14,958 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 52 [2022-07-20 06:24:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:24:14,958 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2022-07-20 06:24:14,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:24:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2022-07-20 06:24:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 06:24:14,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:24:14,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:24:14,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 06:24:15,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:15,171 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:24:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:24:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1862680376, now seen corresponding path program 1 times [2022-07-20 06:24:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:24:15,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100553409] [2022-07-20 06:24:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:24:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:15,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:24:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:15,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:24:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:24:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:24:15,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:24:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100553409] [2022-07-20 06:24:15,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100553409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:24:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304091398] [2022-07-20 06:24:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:15,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:15,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:24:15,679 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:24:15,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 06:24:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 06:24:15,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:24:16,083 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 [2022-07-20 06:24:16,090 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 [2022-07-20 06:24:16,133 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:24:16,133 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 31 treesize of output 26 [2022-07-20 06:24:16,143 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:24:16,143 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 38 treesize of output 29 [2022-07-20 06:24:16,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-20 06:24:16,196 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 [2022-07-20 06:24:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 06:24:16,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:24:16,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304091398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:24:16,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:24:16,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [26] total 37 [2022-07-20 06:24:16,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876518622] [2022-07-20 06:24:16,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:24:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 06:24:16,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:24:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 06:24:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 06:24:16,244 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:24:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:24:16,437 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-07-20 06:24:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:24:16,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-07-20 06:24:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:24:16,438 INFO L225 Difference]: With dead ends: 126 [2022-07-20 06:24:16,438 INFO L226 Difference]: Without dead ends: 126 [2022-07-20 06:24:16,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 06:24:16,439 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 232 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:24:16,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 347 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:24:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-20 06:24:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-07-20 06:24:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.2857142857142858) internal successors, (126), 116 states have internal predecessors, (126), 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) [2022-07-20 06:24:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2022-07-20 06:24:16,442 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 52 [2022-07-20 06:24:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:24:16,442 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2022-07-20 06:24:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:24:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2022-07-20 06:24:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 06:24:16,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:24:16,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:24:16,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 06:24:16,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-20 06:24:16,647 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:24:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:24:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash 965522297, now seen corresponding path program 1 times [2022-07-20 06:24:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:24:16,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285824295] [2022-07-20 06:24:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:24:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:24:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:16,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:24:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:16,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:24:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:24:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:24:17,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285824295] [2022-07-20 06:24:17,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285824295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:24:17,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318440117] [2022-07-20 06:24:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:24:17,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:24:17,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 06:24:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-20 06:24:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:24:17,368 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 [2022-07-20 06:24:17,506 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:24:17,507 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 [2022-07-20 06:24:17,575 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 [2022-07-20 06:24:17,669 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:24:17,669 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 19 treesize of output 22 [2022-07-20 06:24:17,788 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:24:17,789 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 30 treesize of output 17 [2022-07-20 06:24:17,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-07-20 06:24:17,888 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2773 (Array Int Int)) (v_ArrVal_2772 (Array Int Int))) (and (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2773) |c_#memory_$Pointer$.offset|) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2772) |c_#memory_$Pointer$.base|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-07-20 06:24:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:17,914 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:24:17,915 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 36 treesize of output 40 [2022-07-20 06:24:17,922 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-20 06:24:17,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 06:24:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:17,926 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 34 treesize of output 34 [2022-07-20 06:24:17,969 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 35 treesize of output 23 [2022-07-20 06:24:18,079 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:24:18,079 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 35 treesize of output 18 [2022-07-20 06:24:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-20 06:24:18,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:24:18,286 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2781 (Array Int Int)) (v_ArrVal_2780 (Array Int Int)) (|v_node_create_~temp~0#1.base_53| Int)) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_53| v_ArrVal_2780) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (or (not (= 0 (select |c_#valid| |v_node_create_~temp~0#1.base_53|))) (not (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_53| v_ArrVal_2781))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (= .cse0 (select (select .cse1 .cse0) .cse2))))) (not (< |v_node_create_~temp~0#1.base_53| |c_#StackHeapBarrier|)) (not (<= 0 .cse2))))) is different from false [2022-07-20 06:24:18,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318440117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:24:18,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:24:18,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2022-07-20 06:24:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14865517] [2022-07-20 06:24:18,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:24:18,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 06:24:18,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:24:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 06:24:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2197, Unknown=2, NotChecked=190, Total=2550 [2022-07-20 06:24:18,289 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:24:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:24:19,449 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2022-07-20 06:24:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 06:24:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2022-07-20 06:24:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:24:19,456 INFO L225 Difference]: With dead ends: 127 [2022-07-20 06:24:19,456 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 06:24:19,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=317, Invalid=3595, Unknown=2, NotChecked=246, Total=4160 [2022-07-20 06:24:19,457 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:24:19,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1499 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1437 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-07-20 06:24:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 06:24:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-07-20 06:24:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.2755102040816326) internal successors, (125), 116 states have internal predecessors, (125), 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) [2022-07-20 06:24:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2022-07-20 06:24:19,460 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 54 [2022-07-20 06:24:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:24:19,460 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2022-07-20 06:24:19,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:24:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2022-07-20 06:24:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 06:24:19,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:24:19,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-07-20 06:24:19,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 06:24:19,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 06:24:19,675 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:24:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:24:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2042113126, now seen corresponding path program 3 times [2022-07-20 06:24:19,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:24:19,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600951524] [2022-07-20 06:24:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:19,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:24:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:24:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:19,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:24:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:19,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-20 06:24:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:19,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 06:24:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-20 06:24:19,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:24:19,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600951524] [2022-07-20 06:24:19,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600951524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:24:19,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032401988] [2022-07-20 06:24:19,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 06:24:19,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:19,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:24:19,737 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:24:19,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 06:24:19,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 06:24:19,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:24:19,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:24:19,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:24:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 06:24:19,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:24:19,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032401988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:24:19,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:24:19,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-20 06:24:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096768535] [2022-07-20 06:24:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:24:19,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:24:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:24:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:24:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:24:19,983 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 06:24:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:24:19,993 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-07-20 06:24:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:24:19,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-07-20 06:24:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:24:19,994 INFO L225 Difference]: With dead ends: 92 [2022-07-20 06:24:19,994 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 06:24:19,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:24:19,995 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 70 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:24:19,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 109 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:24:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 06:24:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-20 06:24:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 86 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) [2022-07-20 06:24:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-07-20 06:24:19,999 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 58 [2022-07-20 06:24:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:24:20,000 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-07-20 06:24:20,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 06:24:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-07-20 06:24:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 06:24:20,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:24:20,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:24:20,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 06:24:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:20,211 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:24:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:24:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash -214738826, now seen corresponding path program 1 times [2022-07-20 06:24:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:24:20,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941774295] [2022-07-20 06:24:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:20,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:24:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:20,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:24:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:20,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:24:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:20,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:24:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:24:21,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:24:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941774295] [2022-07-20 06:24:21,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941774295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:24:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004001684] [2022-07-20 06:24:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:24:21,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:24:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:24:21,333 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:24:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 06:24:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:24:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 177 conjunts are in the unsatisfiable core [2022-07-20 06:24:21,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:24:21,587 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 [2022-07-20 06:24:21,764 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 [2022-07-20 06:24:21,874 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:24:21,875 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 [2022-07-20 06:24:21,978 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 [2022-07-20 06:24:21,988 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 [2022-07-20 06:24:22,131 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:24:22,132 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 36 treesize of output 35 [2022-07-20 06:24:22,135 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 [2022-07-20 06:24:22,330 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:24:22,330 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 48 treesize of output 27 [2022-07-20 06:24:22,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:24:22,507 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 [2022-07-20 06:24:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:24,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-20 06:24:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:24,359 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:24:24,360 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 53 [2022-07-20 06:24:24,369 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-20 06:24:24,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 06:24:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:25,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:24:25,125 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:24:25,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 27 [2022-07-20 06:24:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:25,472 INFO L356 Elim1Store]: treesize reduction 57, result has 21.9 percent of original size [2022-07-20 06:24:25,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 78 treesize of output 51 [2022-07-20 06:24:25,688 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 19 treesize of output 18 [2022-07-20 06:24:25,720 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 [2022-07-20 06:24:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:25,732 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 [2022-07-20 06:24:25,737 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 [2022-07-20 06:24:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:25,814 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 44 treesize of output 31 [2022-07-20 06:24:25,819 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 [2022-07-20 06:24:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:25,824 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 [2022-07-20 06:24:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:24:25,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-07-20 06:24:25,948 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 [2022-07-20 06:24:25,974 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 [2022-07-20 06:24:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:24:25,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:24:26,131 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3202 (Array Int Int)) (v_ArrVal_3203 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3202) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3203) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))) is different from false [2022-07-20 06:24:26,137 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 178 treesize of output 174 [2022-07-20 06:24:26,145 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:24:26,145 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 150 [2022-07-20 06:24:26,153 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:24:26,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 237 [2022-07-20 06:24:26,158 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 222 treesize of output 214 [2022-07-20 06:24:41,510 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int)) (v_ArrVal_3202 (Array Int Int)) (v_arrayElimCell_167 Int)) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3197) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3202) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|))) (let ((.cse8 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse9 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse7 (+ v_arrayElimCell_167 4)))) (.cse3 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse0 (forall ((v_arrayElimCell_164 Int) (v_arrayElimCell_166 Int)) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3197) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3202) v_arrayElimCell_164)) (.cse10 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|))) (or (and .cse10 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse11 (+ v_arrayElimCell_167 4)))) (and (= (select .cse11 (+ v_arrayElimCell_166 4)) |c_ULTIMATE.start_main_~uneq~0#1|) (not .cse10)))))) (.cse2 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse4 (not .cse8))) (and (or .cse0 .cse1) (or .cse2 .cse0) (or (not .cse3) .cse4) (or (and (or (not .cse2) (not .cse1)) (forall ((v_arrayElimCell_164 Int)) (let ((.cse5 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3197) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3202) v_arrayElimCell_164))) (or (and .cse5 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse6 (+ v_arrayElimCell_167 4)))) (and (not .cse5) (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse6 (+ |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| 4)))))))) (and .cse2 .cse1 (or (and .cse4 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse7 (+ |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| 4)))) (and .cse8 .cse9)))))) (and .cse8 .cse9 .cse3))))) is different from false [2022-07-20 06:24:45,076 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int)) (v_ArrVal_3202 (Array Int Int)) (v_arrayElimCell_167 Int) (v_ArrVal_3196 Int)) (let ((.cse9 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| v_ArrVal_3196)) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3197) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3202) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|))) (let ((.cse2 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse9 (+ v_arrayElimCell_167 4)))) (.cse0 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|))) (or (and .cse0 .cse1 .cse2) (let ((.cse4 (forall ((v_arrayElimCell_164 Int) (v_arrayElimCell_166 Int)) (let ((.cse10 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse11 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| v_ArrVal_3196)) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3197) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3202) v_arrayElimCell_164))) (or (and (not .cse10) (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse11 (+ v_arrayElimCell_166 4)))) (and .cse10 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse11 (+ v_arrayElimCell_167 4)))))))) (.cse3 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (not .cse0)) (.cse5 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|))) (and (or .cse3 .cse4) (or .cse5 .cse4) (or (not .cse2) .cse6) (or (and (or (not .cse3) (not .cse5)) (forall ((v_arrayElimCell_164 Int)) (let ((.cse7 (= |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse8 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| v_ArrVal_3196)) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3197) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3202) v_arrayElimCell_164))) (or (and (not .cse7) (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse8 (+ |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| 4)))) (and .cse7 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse8 (+ v_arrayElimCell_167 4)))))))) (and .cse3 (or (and .cse0 .cse1) (and .cse6 (= |c_ULTIMATE.start_main_~uneq~0#1| (select .cse9 (+ |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| 4))))) .cse5)))))))) is different from false [2022-07-20 06:25:19,464 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:25:19,464 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1073 treesize of output 990 [2022-07-20 06:25:19,831 INFO L356 Elim1Store]: treesize reduction 192, result has 42.9 percent of original size [2022-07-20 06:25:19,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 3086 treesize of output 3147 [2022-07-20 06:25:19,897 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:25:19,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3147 treesize of output 3113 [2022-07-20 06:25:19,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:25:19,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3095 treesize of output 3111 [2022-07-20 06:26:50,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004001684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:26:50,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:26:50,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38] total 66 [2022-07-20 06:26:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98046658] [2022-07-20 06:26:50,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:26:50,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 06:26:50,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:26:50,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 06:26:50,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=6060, Unknown=8, NotChecked=474, Total=6806 [2022-07-20 06:26:50,287 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 66 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 57 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:26:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:26:56,036 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-07-20 06:26:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 06:26:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 57 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2022-07-20 06:26:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:26:56,040 INFO L225 Difference]: With dead ends: 92 [2022-07-20 06:26:56,040 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 06:26:56,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=570, Invalid=10776, Unknown=8, NotChecked=636, Total=11990 [2022-07-20 06:26:56,042 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 65 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 06:26:56,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1787 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1967 Invalid, 0 Unknown, 50 Unchecked, 0.9s Time] [2022-07-20 06:26:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 06:26:56,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-20 06:26:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.25) internal successors, (90), 86 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) [2022-07-20 06:26:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-07-20 06:26:56,046 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 59 [2022-07-20 06:26:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:26:56,046 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-07-20 06:26:56,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 57 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:26:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-07-20 06:26:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 06:26:56,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:26:56,048 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:26:56,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 06:26:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:26:56,263 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-07-20 06:26:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:26:56,264 INFO L85 PathProgramCache]: Analyzing trace with hash -205595639, now seen corresponding path program 1 times [2022-07-20 06:26:56,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:26:56,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751808327] [2022-07-20 06:26:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:26:56,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:26:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:26:56,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:26:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:26:57,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 06:26:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:26:57,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 06:26:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:26:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:26:57,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:26:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751808327] [2022-07-20 06:26:57,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751808327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:26:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81500323] [2022-07-20 06:26:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:26:57,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:26:57,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:26:57,480 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:26:57,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 06:26:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:26:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-20 06:26:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:26:57,689 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 [2022-07-20 06:26:57,727 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 [2022-07-20 06:26:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:26:57,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 06:26:57,884 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 [2022-07-20 06:26:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:26:58,000 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 [2022-07-20 06:26:58,249 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 [2022-07-20 06:26:58,251 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 [2022-07-20 06:26:58,293 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 [2022-07-20 06:26:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:26:58,560 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 [2022-07-20 06:26:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:26:58,571 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 [2022-07-20 06:26:58,999 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:26:58,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-07-20 06:26:59,092 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:26:59,093 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 [2022-07-20 06:26:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:26:59,303 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 25 treesize of output 20 [2022-07-20 06:26:59,422 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 [2022-07-20 06:26:59,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:26:59,429 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 32 treesize of output 23 [2022-07-20 06:26:59,538 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:26:59,538 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 40 treesize of output 31 [2022-07-20 06:26:59,560 INFO L356 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2022-07-20 06:26:59,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2022-07-20 06:26:59,851 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:26:59,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-07-20 06:27:00,553 INFO L356 Elim1Store]: treesize reduction 45, result has 26.2 percent of original size [2022-07-20 06:27:00,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 43 [2022-07-20 06:27:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:27:00,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:00,669 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 302 treesize of output 298