./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/array-memsafety/substring-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:44:03,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:44:03,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:44:03,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:44:03,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:44:03,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:44:03,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:44:03,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:44:03,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:44:03,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:44:03,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:44:03,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:44:03,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:44:03,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:44:03,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:44:03,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:44:03,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:44:03,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:44:03,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:44:03,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:44:03,585 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:44:03,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:44:03,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:44:03,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:44:03,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:44:03,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:44:03,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:44:03,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:44:03,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:44:03,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:44:03,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:44:03,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:44:03,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:44:03,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:44:03,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:44:03,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:44:03,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:44:03,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:44:03,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:44:03,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:44:03,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:44:03,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:44:03,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:44:03,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:44:03,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:44:03,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:44:03,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:44:03,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:44:03,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:44:03,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:44:03,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:44:03,632 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:44:03,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:44:03,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:44:03,632 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:44:03,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:44:03,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:44:03,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:44:03,633 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:44:03,633 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:44:03,633 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:44:03,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:44:03,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:44:03,634 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:44:03,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:44:03,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:44:03,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:44:03,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:44:03,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:44:03,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:44:03,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:44:03,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:44:03,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:44:03,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2022-07-23 05:44:03,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:44:03,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:44:03,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:44:03,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:44:03,859 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:44:03,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-23 05:44:03,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf95cc26/65acaeaed041465ab5605e3342186269/FLAGde530ece6 [2022-07-23 05:44:04,315 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:44:04,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-23 05:44:04,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf95cc26/65acaeaed041465ab5605e3342186269/FLAGde530ece6 [2022-07-23 05:44:04,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf95cc26/65acaeaed041465ab5605e3342186269 [2022-07-23 05:44:04,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:44:04,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:44:04,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:44:04,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:44:04,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:44:04,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:44:04" (1/1) ... [2022-07-23 05:44:04,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30bcef98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:04, skipping insertion in model container [2022-07-23 05:44:04,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:44:04" (1/1) ... [2022-07-23 05:44:04,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:44:04,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:44:05,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:44:05,013 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:44:05,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:44:05,080 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:44:05,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05 WrapperNode [2022-07-23 05:44:05,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:44:05,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:44:05,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:44:05,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:44:05,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,134 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-07-23 05:44:05,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:44:05,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:44:05,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:44:05,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:44:05,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:44:05,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:44:05,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:44:05,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:44:05,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (1/1) ... [2022-07-23 05:44:05,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:44:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:05,229 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) [2022-07-23 05:44:05,249 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 [2022-07-23 05:44:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:44:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:44:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:44:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:44:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:44:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:44:05,358 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:44:05,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:44:05,557 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:44:05,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:44:05,561 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 05:44:05,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:44:05 BoogieIcfgContainer [2022-07-23 05:44:05,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:44:05,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:44:05,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:44:05,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:44:05,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:44:04" (1/3) ... [2022-07-23 05:44:05,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4937b4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:44:05, skipping insertion in model container [2022-07-23 05:44:05,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:05" (2/3) ... [2022-07-23 05:44:05,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4937b4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:44:05, skipping insertion in model container [2022-07-23 05:44:05,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:44:05" (3/3) ... [2022-07-23 05:44:05,569 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2022-07-23 05:44:05,580 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:44:05,580 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-23 05:44:05,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:44:05,627 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@582a335f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e2ef46a [2022-07-23 05:44:05,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-23 05:44:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:44:05,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:05,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:05,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-23 05:44:05,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:05,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375995904] [2022-07-23 05:44:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:05,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:05,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375995904] [2022-07-23 05:44:05,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375995904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:05,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:05,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:05,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343162240] [2022-07-23 05:44:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:05,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:05,853 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:05,901 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-07-23 05:44:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:05,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:44:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:05,910 INFO L225 Difference]: With dead ends: 96 [2022-07-23 05:44:05,910 INFO L226 Difference]: Without dead ends: 92 [2022-07-23 05:44:05,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:05,916 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:05,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-23 05:44:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2022-07-23 05:44:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-23 05:44:05,945 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-23 05:44:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:05,946 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-23 05:44:05,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-23 05:44:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:44:05,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:05,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:44:05,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:05,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-23 05:44:05,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:05,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357029074] [2022-07-23 05:44:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357029074] [2022-07-23 05:44:06,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357029074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:06,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:06,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:44:06,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092216257] [2022-07-23 05:44:06,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:44:06,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:44:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:06,034 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,067 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-07-23 05:44:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:44:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:44:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,069 INFO L225 Difference]: With dead ends: 51 [2022-07-23 05:44:06,069 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:44:06,069 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 [2022-07-23 05:44:06,070 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:44:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-23 05:44:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-23 05:44:06,074 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-23 05:44:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,076 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-23 05:44:06,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-23 05:44:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:44:06,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:44:06,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-23 05:44:06,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807850594] [2022-07-23 05:44:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807850594] [2022-07-23 05:44:06,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807850594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:06,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:06,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:06,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221364112] [2022-07-23 05:44:06,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:06,156 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,282 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-07-23 05:44:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:44:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,283 INFO L225 Difference]: With dead ends: 93 [2022-07-23 05:44:06,283 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 05:44:06,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:06,285 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 05:44:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-07-23 05:44:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-23 05:44:06,291 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2022-07-23 05:44:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,291 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-23 05:44:06,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-23 05:44:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:06,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:44:06,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-23 05:44:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881650365] [2022-07-23 05:44:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881650365] [2022-07-23 05:44:06,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881650365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:06,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:06,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461328369] [2022-07-23 05:44:06,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:06,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:06,345 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,374 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-23 05:44:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,376 INFO L225 Difference]: With dead ends: 52 [2022-07-23 05:44:06,376 INFO L226 Difference]: Without dead ends: 52 [2022-07-23 05:44:06,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:06,385 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-23 05:44:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-23 05:44:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-23 05:44:06,395 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2022-07-23 05:44:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,395 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-23 05:44:06,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-23 05:44:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:06,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:44:06,396 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,397 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-23 05:44:06,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370716264] [2022-07-23 05:44:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370716264] [2022-07-23 05:44:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370716264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:06,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:06,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524746951] [2022-07-23 05:44:06,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:06,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:06,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:06,425 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,443 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-07-23 05:44:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:06,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,444 INFO L225 Difference]: With dead ends: 94 [2022-07-23 05:44:06,444 INFO L226 Difference]: Without dead ends: 94 [2022-07-23 05:44:06,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:06,445 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-23 05:44:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-23 05:44:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-23 05:44:06,449 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-23 05:44:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,449 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-23 05:44:06,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-23 05:44:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:06,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:44:06,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-23 05:44:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273042336] [2022-07-23 05:44:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273042336] [2022-07-23 05:44:06,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273042336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:06,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:06,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:06,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055136056] [2022-07-23 05:44:06,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:06,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:06,499 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,539 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-23 05:44:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,541 INFO L225 Difference]: With dead ends: 98 [2022-07-23 05:44:06,541 INFO L226 Difference]: Without dead ends: 98 [2022-07-23 05:44:06,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:06,544 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 155 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-23 05:44:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-07-23 05:44:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.553191489361702) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-23 05:44:06,552 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-07-23 05:44:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,553 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-23 05:44:06,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-23 05:44:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:06,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:44:06,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-23 05:44:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288409208] [2022-07-23 05:44:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288409208] [2022-07-23 05:44:06,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288409208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:06,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:06,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:06,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075230273] [2022-07-23 05:44:06,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:06,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:06,606 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,686 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-07-23 05:44:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:06,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,688 INFO L225 Difference]: With dead ends: 94 [2022-07-23 05:44:06,688 INFO L226 Difference]: Without dead ends: 94 [2022-07-23 05:44:06,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:06,689 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-23 05:44:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-23 05:44:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-23 05:44:06,703 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-07-23 05:44:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,703 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-23 05:44:06,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-23 05:44:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:44:06,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:44:06,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-23 05:44:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075130307] [2022-07-23 05:44:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075130307] [2022-07-23 05:44:06,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075130307] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:06,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:06,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:06,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545733672] [2022-07-23 05:44:06,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:06,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:06,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:06,757 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,776 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-07-23 05:44:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:44:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,777 INFO L225 Difference]: With dead ends: 62 [2022-07-23 05:44:06,777 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:44:06,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:06,778 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:44:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-23 05:44:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.530612244897959) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-07-23 05:44:06,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2022-07-23 05:44:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,795 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-07-23 05:44:06,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-07-23 05:44:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:44:06,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,798 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:44:06,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-23 05:44:06,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227498024] [2022-07-23 05:44:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227498024] [2022-07-23 05:44:06,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227498024] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:06,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267544375] [2022-07-23 05:44:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:06,866 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) [2022-07-23 05:44:06,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:44:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 05:44:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:06,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:06,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:06,992 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 10 treesize of output 8 [2022-07-23 05:44:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267544375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:07,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:07,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-23 05:44:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125375260] [2022-07-23 05:44:07,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:07,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:44:07,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:44:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:44:07,185 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:07,324 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-07-23 05:44:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:44:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:07,325 INFO L225 Difference]: With dead ends: 143 [2022-07-23 05:44:07,325 INFO L226 Difference]: Without dead ends: 143 [2022-07-23 05:44:07,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:44:07,327 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 277 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:07,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 233 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-23 05:44:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 57. [2022-07-23 05:44:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-23 05:44:07,336 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2022-07-23 05:44:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:07,336 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-23 05:44:07,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-23 05:44:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:44:07,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:07,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:07,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:07,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:07,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-23 05:44:07,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:07,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564777034] [2022-07-23 05:44:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:07,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:07,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564777034] [2022-07-23 05:44:07,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564777034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:07,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:07,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021498862] [2022-07-23 05:44:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:07,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:07,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:07,638 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:07,696 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-07-23 05:44:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-23 05:44:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:07,697 INFO L225 Difference]: With dead ends: 81 [2022-07-23 05:44:07,697 INFO L226 Difference]: Without dead ends: 81 [2022-07-23 05:44:07,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:44:07,698 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 230 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:07,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-23 05:44:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-07-23 05:44:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.5) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-07-23 05:44:07,702 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2022-07-23 05:44:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:07,703 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-07-23 05:44:07,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-07-23 05:44:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:44:07,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:07,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:07,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-23 05:44:07,705 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-23 05:44:07,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:07,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467676101] [2022-07-23 05:44:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:07,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467676101] [2022-07-23 05:44:07,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467676101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:07,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:07,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:07,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885966046] [2022-07-23 05:44:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:07,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:07,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:07,753 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:07,776 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-23 05:44:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-23 05:44:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:07,777 INFO L225 Difference]: With dead ends: 57 [2022-07-23 05:44:07,777 INFO L226 Difference]: Without dead ends: 57 [2022-07-23 05:44:07,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:07,778 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:07,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-23 05:44:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-23 05:44:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-23 05:44:07,780 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-23 05:44:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:07,780 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-23 05:44:07,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-23 05:44:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:44:07,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:07,783 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 05:44:07,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-23 05:44:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:07,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397443177] [2022-07-23 05:44:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397443177] [2022-07-23 05:44:07,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397443177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321992585] [2022-07-23 05:44:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:07,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:07,880 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) [2022-07-23 05:44:07,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:44:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:44:07,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:07,966 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:07,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321992585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:08,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:08,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-23 05:44:08,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306514369] [2022-07-23 05:44:08,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:08,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:44:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:08,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:44:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:08,158 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:08,298 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2022-07-23 05:44:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:44:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:44:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:08,299 INFO L225 Difference]: With dead ends: 115 [2022-07-23 05:44:08,299 INFO L226 Difference]: Without dead ends: 115 [2022-07-23 05:44:08,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:44:08,299 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 180 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:08,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 193 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-23 05:44:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 54. [2022-07-23 05:44:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-23 05:44:08,301 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 13 [2022-07-23 05:44:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:08,301 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-23 05:44:08,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-23 05:44:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:44:08,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:08,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:08,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:08,502 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,SelfDestructingSolverStorable11 [2022-07-23 05:44:08,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash 172811107, now seen corresponding path program 1 times [2022-07-23 05:44:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:08,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511467502] [2022-07-23 05:44:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511467502] [2022-07-23 05:44:08,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511467502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:08,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:08,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:08,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659533657] [2022-07-23 05:44:08,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:08,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:08,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:08,540 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:08,572 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-07-23 05:44:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:08,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:44:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:08,573 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:44:08,573 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 05:44:08,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:08,574 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:08,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 05:44:08,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-07-23 05:44:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-07-23 05:44:08,575 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2022-07-23 05:44:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:08,575 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-07-23 05:44:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-07-23 05:44:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:44:08,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:08,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-23 05:44:08,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash 172811108, now seen corresponding path program 1 times [2022-07-23 05:44:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:08,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577083901] [2022-07-23 05:44:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577083901] [2022-07-23 05:44:08,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577083901] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:08,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:08,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501531503] [2022-07-23 05:44:08,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:08,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:08,641 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:08,713 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-07-23 05:44:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:44:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:44:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:08,714 INFO L225 Difference]: With dead ends: 69 [2022-07-23 05:44:08,714 INFO L226 Difference]: Without dead ends: 69 [2022-07-23 05:44:08,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:44:08,715 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 156 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:08,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 75 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:08,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-23 05:44:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2022-07-23 05:44:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-07-23 05:44:08,716 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 14 [2022-07-23 05:44:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:08,717 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-07-23 05:44:08,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-07-23 05:44:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:44:08,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:08,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:08,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-23 05:44:08,718 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1432273078, now seen corresponding path program 1 times [2022-07-23 05:44:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:08,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805992482] [2022-07-23 05:44:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:08,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805992482] [2022-07-23 05:44:08,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805992482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:08,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:08,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680000863] [2022-07-23 05:44:08,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:08,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:08,753 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:08,767 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-07-23 05:44:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:08,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-23 05:44:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:08,768 INFO L225 Difference]: With dead ends: 58 [2022-07-23 05:44:08,768 INFO L226 Difference]: Without dead ends: 55 [2022-07-23 05:44:08,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:08,768 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:08,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-23 05:44:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-23 05:44:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-23 05:44:08,770 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 16 [2022-07-23 05:44:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:08,770 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-23 05:44:08,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-23 05:44:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:44:08,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:08,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:08,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-23 05:44:08,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954455, now seen corresponding path program 1 times [2022-07-23 05:44:08,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:08,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9589018] [2022-07-23 05:44:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:08,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:08,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9589018] [2022-07-23 05:44:08,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9589018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:08,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:08,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:08,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515975991] [2022-07-23 05:44:08,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:08,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:08,794 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:08,853 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-23 05:44:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:08,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:44:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:08,854 INFO L225 Difference]: With dead ends: 55 [2022-07-23 05:44:08,854 INFO L226 Difference]: Without dead ends: 55 [2022-07-23 05:44:08,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:08,855 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:08,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 54 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-23 05:44:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-23 05:44:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-07-23 05:44:08,857 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 18 [2022-07-23 05:44:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:08,857 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-07-23 05:44:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-07-23 05:44:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:44:08,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:08,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:08,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-23 05:44:08,858 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954454, now seen corresponding path program 1 times [2022-07-23 05:44:08,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:08,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136461188] [2022-07-23 05:44:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:08,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136461188] [2022-07-23 05:44:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136461188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:08,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:08,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:44:08,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156949317] [2022-07-23 05:44:08,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:08,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:44:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:44:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:08,913 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:09,009 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-07-23 05:44:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:09,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:44:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:09,010 INFO L225 Difference]: With dead ends: 80 [2022-07-23 05:44:09,010 INFO L226 Difference]: Without dead ends: 80 [2022-07-23 05:44:09,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:09,011 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 208 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:09,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-23 05:44:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-23 05:44:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-23 05:44:09,014 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2022-07-23 05:44:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:09,016 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-23 05:44:09,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-23 05:44:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:44:09,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:09,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:09,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-23 05:44:09,017 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2001945381, now seen corresponding path program 1 times [2022-07-23 05:44:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670501798] [2022-07-23 05:44:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:09,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:09,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:09,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670501798] [2022-07-23 05:44:09,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670501798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:09,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:09,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657301459] [2022-07-23 05:44:09,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:09,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:44:09,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:44:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:09,042 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:09,047 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-07-23 05:44:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:44:09,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:44:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:09,048 INFO L225 Difference]: With dead ends: 62 [2022-07-23 05:44:09,048 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:44:09,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:09,049 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:09,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:44:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-23 05:44:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-07-23 05:44:09,051 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 18 [2022-07-23 05:44:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:09,051 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-07-23 05:44:09,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-07-23 05:44:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:44:09,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:09,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:09,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-23 05:44:09,052 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash 275803338, now seen corresponding path program 1 times [2022-07-23 05:44:09,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:09,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924771599] [2022-07-23 05:44:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:09,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:09,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:09,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924771599] [2022-07-23 05:44:09,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924771599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:09,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:09,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:44:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200568713] [2022-07-23 05:44:09,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:09,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:09,095 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:09,145 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-07-23 05:44:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:09,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-23 05:44:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:09,147 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:44:09,147 INFO L226 Difference]: Without dead ends: 63 [2022-07-23 05:44:09,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:44:09,147 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:09,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 115 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-23 05:44:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-07-23 05:44:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-07-23 05:44:09,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 20 [2022-07-23 05:44:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:09,150 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-07-23 05:44:09,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-07-23 05:44:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:44:09,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:09,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:09,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-23 05:44:09,151 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash -309239812, now seen corresponding path program 1 times [2022-07-23 05:44:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:09,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291511131] [2022-07-23 05:44:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:09,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:09,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291511131] [2022-07-23 05:44:09,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291511131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:09,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:09,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-23 05:44:09,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433334297] [2022-07-23 05:44:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:09,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:44:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:44:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:44:09,309 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:09,606 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2022-07-23 05:44:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:44:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:44:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:09,608 INFO L225 Difference]: With dead ends: 112 [2022-07-23 05:44:09,608 INFO L226 Difference]: Without dead ends: 112 [2022-07-23 05:44:09,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:44:09,609 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:09,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 255 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-23 05:44:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2022-07-23 05:44:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-07-23 05:44:09,615 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 21 [2022-07-23 05:44:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:09,615 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-07-23 05:44:09,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-07-23 05:44:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:44:09,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:09,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:09,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-23 05:44:09,618 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1998183554, now seen corresponding path program 1 times [2022-07-23 05:44:09,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:09,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411155011] [2022-07-23 05:44:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:09,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:09,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411155011] [2022-07-23 05:44:09,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411155011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:09,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:09,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-23 05:44:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680145866] [2022-07-23 05:44:09,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:09,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:44:09,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:44:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:44:09,736 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:10,027 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2022-07-23 05:44:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:44:10,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:44:10,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:10,028 INFO L225 Difference]: With dead ends: 139 [2022-07-23 05:44:10,028 INFO L226 Difference]: Without dead ends: 139 [2022-07-23 05:44:10,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:44:10,029 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:10,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 251 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-23 05:44:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 83. [2022-07-23 05:44:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-07-23 05:44:10,031 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2022-07-23 05:44:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:10,031 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-07-23 05:44:10,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-07-23 05:44:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:44:10,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:10,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:10,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-23 05:44:10,031 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash -826750037, now seen corresponding path program 1 times [2022-07-23 05:44:10,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:10,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637540230] [2022-07-23 05:44:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:10,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637540230] [2022-07-23 05:44:10,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637540230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:10,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:10,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:44:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868613194] [2022-07-23 05:44:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:10,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:44:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:44:10,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:10,107 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:10,155 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-07-23 05:44:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:44:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:10,156 INFO L225 Difference]: With dead ends: 95 [2022-07-23 05:44:10,156 INFO L226 Difference]: Without dead ends: 78 [2022-07-23 05:44:10,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:44:10,157 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:10,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 173 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-23 05:44:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-23 05:44:10,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-07-23 05:44:10,159 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2022-07-23 05:44:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:10,160 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-07-23 05:44:10,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-07-23 05:44:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:44:10,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:10,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:10,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-23 05:44:10,161 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash -404048211, now seen corresponding path program 1 times [2022-07-23 05:44:10,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:10,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033715287] [2022-07-23 05:44:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:10,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:10,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:10,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033715287] [2022-07-23 05:44:10,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033715287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:10,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:10,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:44:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766662395] [2022-07-23 05:44:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:44:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:44:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:44:10,258 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:10,318 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-07-23 05:44:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:44:10,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:44:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:10,319 INFO L225 Difference]: With dead ends: 77 [2022-07-23 05:44:10,319 INFO L226 Difference]: Without dead ends: 65 [2022-07-23 05:44:10,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:10,320 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:10,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 152 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-23 05:44:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-07-23 05:44:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-07-23 05:44:10,323 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-07-23 05:44:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:10,323 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-07-23 05:44:10,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-07-23 05:44:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:44:10,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:10,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:10,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-23 05:44:10,325 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash -481506431, now seen corresponding path program 1 times [2022-07-23 05:44:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:10,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642906528] [2022-07-23 05:44:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:10,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642906528] [2022-07-23 05:44:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642906528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:10,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:10,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:44:10,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144830546] [2022-07-23 05:44:10,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:10,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:44:10,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:44:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:44:10,421 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:10,516 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-07-23 05:44:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:44:10,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:44:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:10,516 INFO L225 Difference]: With dead ends: 67 [2022-07-23 05:44:10,516 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:44:10,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:44:10,517 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:10,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 185 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:44:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-23 05:44:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-23 05:44:10,518 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2022-07-23 05:44:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:10,518 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-23 05:44:10,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-23 05:44:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:44:10,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:10,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:10,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-23 05:44:10,520 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -262651713, now seen corresponding path program 1 times [2022-07-23 05:44:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886360920] [2022-07-23 05:44:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:10,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:10,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886360920] [2022-07-23 05:44:10,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886360920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:10,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:10,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:44:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510006740] [2022-07-23 05:44:10,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:10,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:44:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:44:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:10,641 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:10,751 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-07-23 05:44:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:44:10,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:44:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:10,751 INFO L225 Difference]: With dead ends: 63 [2022-07-23 05:44:10,751 INFO L226 Difference]: Without dead ends: 55 [2022-07-23 05:44:10,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:44:10,753 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:10,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 164 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-23 05:44:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-23 05:44:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-07-23 05:44:10,754 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 25 [2022-07-23 05:44:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:10,754 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-07-23 05:44:10,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-07-23 05:44:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:44:10,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:10,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-23 05:44:10,755 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:10,755 INFO L85 PathProgramCache]: Analyzing trace with hash 838689666, now seen corresponding path program 1 times [2022-07-23 05:44:10,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:10,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141789471] [2022-07-23 05:44:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:10,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:10,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141789471] [2022-07-23 05:44:10,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141789471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:10,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365029620] [2022-07-23 05:44:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:10,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:10,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:10,867 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) [2022-07-23 05:44:10,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:44:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:10,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:44:10,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:11,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:11,101 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 [2022-07-23 05:44:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:11,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365029620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:11,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:11,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-23 05:44:11,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361481458] [2022-07-23 05:44:11,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:44:11,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:44:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:44:11,117 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:11,273 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-07-23 05:44:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:44:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-23 05:44:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:11,274 INFO L225 Difference]: With dead ends: 73 [2022-07-23 05:44:11,274 INFO L226 Difference]: Without dead ends: 69 [2022-07-23 05:44:11,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:44:11,274 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 333 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:11,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 165 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-23 05:44:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-07-23 05:44:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-23 05:44:11,276 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2022-07-23 05:44:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:11,276 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-23 05:44:11,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-23 05:44:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:44:11,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:11,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:11,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:11,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:11,477 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1473116751, now seen corresponding path program 1 times [2022-07-23 05:44:11,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140392313] [2022-07-23 05:44:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:11,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140392313] [2022-07-23 05:44:11,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140392313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617721167] [2022-07-23 05:44:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:11,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:11,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:11,556 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) [2022-07-23 05:44:11,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:44:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:11,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 05:44:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:11,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:11,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:11,691 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 10 treesize of output 8 [2022-07-23 05:44:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:11,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:11,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617721167] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:11,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:11,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-07-23 05:44:11,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284423422] [2022-07-23 05:44:11,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:11,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:44:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:11,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:44:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:44:11,928 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:12,120 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2022-07-23 05:44:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:44:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-23 05:44:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:12,121 INFO L225 Difference]: With dead ends: 86 [2022-07-23 05:44:12,121 INFO L226 Difference]: Without dead ends: 86 [2022-07-23 05:44:12,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:44:12,122 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:12,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 117 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-23 05:44:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-07-23 05:44:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-07-23 05:44:12,124 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 31 [2022-07-23 05:44:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:12,124 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-07-23 05:44:12,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-07-23 05:44:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:44:12,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:12,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:12,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-23 05:44:12,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-23 05:44:12,325 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:12,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1707334280, now seen corresponding path program 1 times [2022-07-23 05:44:12,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:12,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607597409] [2022-07-23 05:44:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:12,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:12,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:12,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607597409] [2022-07-23 05:44:12,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607597409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:12,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757462111] [2022-07-23 05:44:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:12,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:12,392 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) [2022-07-23 05:44:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:44:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:12,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 05:44:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:12,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:12,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:12,489 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 10 treesize of output 8 [2022-07-23 05:44:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:12,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:12,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757462111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:12,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:12,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-07-23 05:44:12,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659017421] [2022-07-23 05:44:12,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:12,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:44:12,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:44:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:44:12,738 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:13,082 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-07-23 05:44:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:44:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-23 05:44:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:13,083 INFO L225 Difference]: With dead ends: 80 [2022-07-23 05:44:13,083 INFO L226 Difference]: Without dead ends: 80 [2022-07-23 05:44:13,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:44:13,084 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 234 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:13,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 153 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-23 05:44:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-07-23 05:44:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2022-07-23 05:44:13,086 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 33 [2022-07-23 05:44:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:13,086 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2022-07-23 05:44:13,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2022-07-23 05:44:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 05:44:13,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:13,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:13,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:13,304 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,SelfDestructingSolverStorable27 [2022-07-23 05:44:13,305 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2102124002, now seen corresponding path program 2 times [2022-07-23 05:44:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:13,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001788280] [2022-07-23 05:44:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:13,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:13,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:13,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001788280] [2022-07-23 05:44:13,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001788280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:13,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358359072] [2022-07-23 05:44:13,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:13,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:13,494 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) [2022-07-23 05:44:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:44:13,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:13,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:44:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:13,586 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 14 treesize of output 10 [2022-07-23 05:44:13,776 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:13,777 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 18 treesize of output 18 [2022-07-23 05:44:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:13,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:14,209 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 13 [2022-07-23 05:44:14,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-23 05:44:14,219 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 26 treesize of output 22 [2022-07-23 05:44:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:14,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358359072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:14,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:14,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-07-23 05:44:14,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455459019] [2022-07-23 05:44:14,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:14,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:44:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:44:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:44:14,237 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:14,623 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-07-23 05:44:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 05:44:14,624 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 05:44:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:14,625 INFO L225 Difference]: With dead ends: 93 [2022-07-23 05:44:14,625 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 05:44:14,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2022-07-23 05:44:14,626 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:14,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 303 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-23 05:44:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 05:44:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-07-23 05:44:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 83 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-07-23 05:44:14,628 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 36 [2022-07-23 05:44:14,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:14,628 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-07-23 05:44:14,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-07-23 05:44:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 05:44:14,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:14,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:14,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:14,839 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,SelfDestructingSolverStorable28 [2022-07-23 05:44:14,839 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1563569052, now seen corresponding path program 1 times [2022-07-23 05:44:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:14,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901306494] [2022-07-23 05:44:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:14,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901306494] [2022-07-23 05:44:14,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901306494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695821661] [2022-07-23 05:44:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:14,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:14,931 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) [2022-07-23 05:44:14,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:44:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:14,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:44:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:15,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:15,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:15,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:44:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:15,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:15,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695821661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:15,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:15,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-07-23 05:44:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039316760] [2022-07-23 05:44:15,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:15,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:44:15,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:44:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:44:15,284 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:15,647 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2022-07-23 05:44:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:44:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-23 05:44:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:15,648 INFO L225 Difference]: With dead ends: 114 [2022-07-23 05:44:15,648 INFO L226 Difference]: Without dead ends: 114 [2022-07-23 05:44:15,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:44:15,649 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 390 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:15,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 117 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-23 05:44:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 84. [2022-07-23 05:44:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-07-23 05:44:15,651 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 37 [2022-07-23 05:44:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:15,651 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-07-23 05:44:15,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-07-23 05:44:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 05:44:15,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:15,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:15,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:15,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:15,858 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2117126329, now seen corresponding path program 2 times [2022-07-23 05:44:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:15,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896726367] [2022-07-23 05:44:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:16,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:16,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896726367] [2022-07-23 05:44:16,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896726367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:16,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222248810] [2022-07-23 05:44:16,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:16,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:16,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:16,047 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) [2022-07-23 05:44:16,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:44:16,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:16,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-23 05:44:16,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:16,169 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 10 treesize of output 8 [2022-07-23 05:44:16,268 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 14 treesize of output 10 [2022-07-23 05:44:16,303 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 17 treesize of output 19 [2022-07-23 05:44:16,391 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:16,392 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 15 treesize of output 10 [2022-07-23 05:44:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:16,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:16,458 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_390 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_390) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-23 05:44:16,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:16,470 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 23 treesize of output 24 [2022-07-23 05:44:16,474 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:16,475 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 37 treesize of output 37 [2022-07-23 05:44:16,477 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 11 treesize of output 7 [2022-07-23 05:44:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:16,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222248810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:16,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:16,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-07-23 05:44:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751389578] [2022-07-23 05:44:16,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:16,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:44:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:44:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=718, Unknown=1, NotChecked=54, Total=870 [2022-07-23 05:44:16,622 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:16,872 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-07-23 05:44:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:44:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-23 05:44:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:16,873 INFO L225 Difference]: With dead ends: 146 [2022-07-23 05:44:16,873 INFO L226 Difference]: Without dead ends: 130 [2022-07-23 05:44:16,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=922, Unknown=1, NotChecked=62, Total=1122 [2022-07-23 05:44:16,874 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:16,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 254 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-23 05:44:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-23 05:44:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-07-23 05:44:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 122 states have (on average 1.139344262295082) internal successors, (139), 124 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2022-07-23 05:44:16,876 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 42 [2022-07-23 05:44:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:16,876 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2022-07-23 05:44:16,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2022-07-23 05:44:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 05:44:16,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:16,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:16,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:17,095 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,SelfDestructingSolverStorable30 [2022-07-23 05:44:17,095 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1160738303, now seen corresponding path program 2 times [2022-07-23 05:44:17,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:17,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575818162] [2022-07-23 05:44:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:17,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575818162] [2022-07-23 05:44:17,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575818162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697783337] [2022-07-23 05:44:17,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:17,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:17,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:17,573 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) [2022-07-23 05:44:17,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:44:17,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:17,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:17,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:44:17,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:17,767 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 14 treesize of output 10 [2022-07-23 05:44:17,934 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 [2022-07-23 05:44:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:18,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-23 05:44:18,006 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 26 treesize of output 22 [2022-07-23 05:44:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:18,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697783337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:18,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:18,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-07-23 05:44:18,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757448255] [2022-07-23 05:44:18,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:18,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:44:18,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:18,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:44:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:44:18,102 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:19,277 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions. [2022-07-23 05:44:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-23 05:44:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-23 05:44:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:19,278 INFO L225 Difference]: With dead ends: 218 [2022-07-23 05:44:19,278 INFO L226 Difference]: Without dead ends: 193 [2022-07-23 05:44:19,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2022-07-23 05:44:19,279 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 375 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:19,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 566 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 604 Invalid, 0 Unknown, 142 Unchecked, 0.3s Time] [2022-07-23 05:44:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-23 05:44:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 145. [2022-07-23 05:44:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 144 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2022-07-23 05:44:19,281 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 44 [2022-07-23 05:44:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:19,282 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2022-07-23 05:44:19,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2022-07-23 05:44:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 05:44:19,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:19,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:19,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-23 05:44:19,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:19,483 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1310015382, now seen corresponding path program 3 times [2022-07-23 05:44:19,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:19,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128000053] [2022-07-23 05:44:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:19,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:19,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128000053] [2022-07-23 05:44:19,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128000053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:19,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137715609] [2022-07-23 05:44:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:19,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:19,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:19,588 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) [2022-07-23 05:44:19,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:44:19,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:44:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 05:44:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:19,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:19,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:19,707 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 10 treesize of output 8 [2022-07-23 05:44:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:19,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:20,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137715609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:20,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:20,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2022-07-23 05:44:20,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838241703] [2022-07-23 05:44:20,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:20,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 05:44:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 05:44:20,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:44:20,129 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:20,514 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2022-07-23 05:44:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:44:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-23 05:44:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:20,516 INFO L225 Difference]: With dead ends: 203 [2022-07-23 05:44:20,516 INFO L226 Difference]: Without dead ends: 203 [2022-07-23 05:44:20,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:44:20,517 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 518 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:20,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 240 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-23 05:44:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2022-07-23 05:44:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 163 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2022-07-23 05:44:20,528 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 46 [2022-07-23 05:44:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:20,529 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2022-07-23 05:44:20,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2022-07-23 05:44:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:44:20,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:20,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:20,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:20,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-23 05:44:20,747 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash -204836258, now seen corresponding path program 3 times [2022-07-23 05:44:20,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:20,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972412272] [2022-07-23 05:44:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:20,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:44:21,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972412272] [2022-07-23 05:44:21,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972412272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294425058] [2022-07-23 05:44:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:21,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:21,008 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) [2022-07-23 05:44:21,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:44:21,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:44:21,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:44:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:21,140 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 10 treesize of output 8 [2022-07-23 05:44:21,332 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 14 treesize of output 10 [2022-07-23 05:44:21,371 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 17 treesize of output 19 [2022-07-23 05:44:21,734 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-23 05:44:21,734 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 30 treesize of output 23 [2022-07-23 05:44:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:44:21,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:22,200 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_36| Int) (v_ArrVal_494 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_494))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps2~0#1.offset_36|) (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_36| 1)) .cse1)) (= .cse1 0) (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_36|)))))) is different from false [2022-07-23 05:44:22,208 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:22,208 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 64 treesize of output 42 [2022-07-23 05:44:22,219 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:22,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-23 05:44:22,227 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:22,227 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 68 treesize of output 64 [2022-07-23 05:44:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:44:22,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294425058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:22,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:22,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-07-23 05:44:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325879572] [2022-07-23 05:44:22,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-23 05:44:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-23 05:44:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1654, Unknown=1, NotChecked=82, Total=1892 [2022-07-23 05:44:22,559 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:22,916 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2022-07-23 05:44:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:44:22,917 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-23 05:44:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:22,917 INFO L225 Difference]: With dead ends: 159 [2022-07-23 05:44:22,917 INFO L226 Difference]: Without dead ends: 126 [2022-07-23 05:44:22,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=2693, Unknown=1, NotChecked=106, Total=3080 [2022-07-23 05:44:22,919 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:22,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 641 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 542 Invalid, 0 Unknown, 166 Unchecked, 0.1s Time] [2022-07-23 05:44:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-23 05:44:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-07-23 05:44:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2022-07-23 05:44:22,921 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 48 [2022-07-23 05:44:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:22,921 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2022-07-23 05:44:22,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2022-07-23 05:44:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:44:22,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:22,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:22,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:23,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-23 05:44:23,122 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:23,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 532688685, now seen corresponding path program 1 times [2022-07-23 05:44:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:23,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974229663] [2022-07-23 05:44:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:23,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:23,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974229663] [2022-07-23 05:44:23,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974229663] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770504205] [2022-07-23 05:44:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:23,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:23,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:23,238 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) [2022-07-23 05:44:23,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:44:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-23 05:44:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:23,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:23,333 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 10 treesize of output 8 [2022-07-23 05:44:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:23,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:23,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770504205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:23,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:23,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-07-23 05:44:23,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795615681] [2022-07-23 05:44:23,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:23,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 05:44:23,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 05:44:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:44:23,727 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:24,180 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-07-23 05:44:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:44:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-23 05:44:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:24,181 INFO L225 Difference]: With dead ends: 152 [2022-07-23 05:44:24,181 INFO L226 Difference]: Without dead ends: 152 [2022-07-23 05:44:24,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 05:44:24,182 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 575 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:24,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 217 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-23 05:44:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2022-07-23 05:44:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 124 states have (on average 1.153225806451613) internal successors, (143), 126 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2022-07-23 05:44:24,185 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 48 [2022-07-23 05:44:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:24,185 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2022-07-23 05:44:24,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2022-07-23 05:44:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:44:24,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:24,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:24,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-23 05:44:24,418 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,SelfDestructingSolverStorable34 [2022-07-23 05:44:24,418 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:24,419 INFO L85 PathProgramCache]: Analyzing trace with hash -575516839, now seen corresponding path program 1 times [2022-07-23 05:44:24,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:24,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589027627] [2022-07-23 05:44:24,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:24,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589027627] [2022-07-23 05:44:24,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589027627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463654672] [2022-07-23 05:44:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:24,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:24,716 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) [2022-07-23 05:44:24,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:44:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:44:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:24,887 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 14 treesize of output 10 [2022-07-23 05:44:25,200 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:25,200 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 18 treesize of output 18 [2022-07-23 05:44:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:44:25,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:25,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-23 05:44:25,770 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 26 treesize of output 22 [2022-07-23 05:44:25,773 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 35 treesize of output 27 [2022-07-23 05:44:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:44:25,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463654672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:25,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:25,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 42 [2022-07-23 05:44:25,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074028648] [2022-07-23 05:44:25,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:25,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-23 05:44:25,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-23 05:44:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1597, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:44:25,800 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:26,927 INFO L93 Difference]: Finished difference Result 251 states and 276 transitions. [2022-07-23 05:44:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-23 05:44:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-23 05:44:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:26,929 INFO L225 Difference]: With dead ends: 251 [2022-07-23 05:44:26,929 INFO L226 Difference]: Without dead ends: 251 [2022-07-23 05:44:26,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=457, Invalid=4513, Unknown=0, NotChecked=0, Total=4970 [2022-07-23 05:44:26,930 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 193 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:26,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 545 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 773 Invalid, 0 Unknown, 192 Unchecked, 0.3s Time] [2022-07-23 05:44:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-23 05:44:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 212. [2022-07-23 05:44:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.1291866028708133) internal successors, (236), 211 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2022-07-23 05:44:26,933 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 51 [2022-07-23 05:44:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:26,933 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2022-07-23 05:44:26,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2022-07-23 05:44:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:44:26,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:26,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:26,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-23 05:44:27,150 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,SelfDestructingSolverStorable35 [2022-07-23 05:44:27,151 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash 314543995, now seen corresponding path program 4 times [2022-07-23 05:44:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:27,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609924742] [2022-07-23 05:44:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:27,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:44:27,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:27,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609924742] [2022-07-23 05:44:27,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609924742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:27,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505402293] [2022-07-23 05:44:27,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:44:27,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:27,260 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) [2022-07-23 05:44:27,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:44:27,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:44:27,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-23 05:44:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:27,355 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:27,355 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:27,360 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 10 treesize of output 8 [2022-07-23 05:44:27,508 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 16 treesize of output 12 [2022-07-23 05:44:27,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-23 05:44:27,833 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-23 05:44:27,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-07-23 05:44:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:44:27,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:28,450 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_604 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_52| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_604))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_52|)) (<= (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_52| 3) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_52| 1)))) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps2~0#1.offset_52|) (= .cse0 0))))) is different from false [2022-07-23 05:44:28,458 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:28,459 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 64 treesize of output 42 [2022-07-23 05:44:28,473 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:28,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-23 05:44:28,482 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:28,482 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 68 treesize of output 64 [2022-07-23 05:44:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:44:29,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505402293] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:29,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:29,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 17] total 41 [2022-07-23 05:44:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832778559] [2022-07-23 05:44:29,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:29,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-23 05:44:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-23 05:44:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1479, Unknown=1, NotChecked=78, Total=1722 [2022-07-23 05:44:29,094 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:30,611 INFO L93 Difference]: Finished difference Result 236 states and 262 transitions. [2022-07-23 05:44:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:44:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-23 05:44:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:30,614 INFO L225 Difference]: With dead ends: 236 [2022-07-23 05:44:30,614 INFO L226 Difference]: Without dead ends: 236 [2022-07-23 05:44:30,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=798, Invalid=3495, Unknown=1, NotChecked=128, Total=4422 [2022-07-23 05:44:30,615 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 385 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:30,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 276 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 453 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2022-07-23 05:44:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-23 05:44:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 223. [2022-07-23 05:44:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 220 states have (on average 1.1318181818181818) internal successors, (249), 222 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 249 transitions. [2022-07-23 05:44:30,618 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 249 transitions. Word has length 52 [2022-07-23 05:44:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:30,618 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 249 transitions. [2022-07-23 05:44:30,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 249 transitions. [2022-07-23 05:44:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-23 05:44:30,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:30,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:30,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:30,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:30,819 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1038457781, now seen corresponding path program 3 times [2022-07-23 05:44:30,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:30,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616468011] [2022-07-23 05:44:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:30,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:44:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:30,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616468011] [2022-07-23 05:44:30,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616468011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:30,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927063404] [2022-07-23 05:44:30,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:30,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:30,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:30,975 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) [2022-07-23 05:44:30,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:44:31,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:44:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 05:44:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:44:31,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:31,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-23 05:44:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:44:31,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927063404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:31,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:31,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-23 05:44:31,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868180624] [2022-07-23 05:44:31,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:31,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:44:31,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:44:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:44:31,383 INFO L87 Difference]: Start difference. First operand 223 states and 249 transitions. Second operand has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:31,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:31,763 INFO L93 Difference]: Finished difference Result 467 states and 523 transitions. [2022-07-23 05:44:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:44:31,764 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-23 05:44:31,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:31,765 INFO L225 Difference]: With dead ends: 467 [2022-07-23 05:44:31,765 INFO L226 Difference]: Without dead ends: 467 [2022-07-23 05:44:31,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 05:44:31,766 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 623 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:31,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 341 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-23 05:44:31,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 292. [2022-07-23 05:44:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 289 states have (on average 1.1522491349480968) internal successors, (333), 291 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 333 transitions. [2022-07-23 05:44:31,770 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 333 transitions. Word has length 55 [2022-07-23 05:44:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:31,770 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 333 transitions. [2022-07-23 05:44:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 333 transitions. [2022-07-23 05:44:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:44:31,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:31,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:31,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:31,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-23 05:44:31,971 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -869737036, now seen corresponding path program 4 times [2022-07-23 05:44:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:31,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887949475] [2022-07-23 05:44:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887949475] [2022-07-23 05:44:32,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887949475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498132138] [2022-07-23 05:44:32,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:44:32,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:32,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:32,590 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) [2022-07-23 05:44:32,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:44:32,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:44:32,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:44:32,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:32,684 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:32,684 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:32,922 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 [2022-07-23 05:44:32,975 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:32,975 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 42 treesize of output 46 [2022-07-23 05:44:32,978 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-23 05:44:32,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-23 05:44:33,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-23 05:44:33,192 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:611) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:529) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:298) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:284) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-23 05:44:33,197 INFO L158 Benchmark]: Toolchain (without parser) took 28471.58ms. Allocated memory was 111.1MB in the beginning and 369.1MB in the end (delta: 257.9MB). Free memory was 82.3MB in the beginning and 286.2MB in the end (delta: -203.9MB). Peak memory consumption was 52.5MB. Max. memory is 16.1GB. [2022-07-23 05:44:33,198 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory was 70.4MB in the beginning and 70.3MB in the end (delta: 44.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 05:44:33,202 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.90ms. Allocated memory was 111.1MB in the beginning and 172.0MB in the end (delta: 60.8MB). Free memory was 82.3MB in the beginning and 140.6MB in the end (delta: -58.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-23 05:44:33,202 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.00ms. Allocated memory is still 172.0MB. Free memory was 140.6MB in the beginning and 138.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 05:44:33,203 INFO L158 Benchmark]: Boogie Preprocessor took 38.55ms. Allocated memory is still 172.0MB. Free memory was 138.4MB in the beginning and 137.5MB in the end (delta: 870.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 05:44:33,203 INFO L158 Benchmark]: RCFGBuilder took 388.31ms. Allocated memory is still 172.0MB. Free memory was 137.0MB in the beginning and 122.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-23 05:44:33,203 INFO L158 Benchmark]: TraceAbstraction took 27633.29ms. Allocated memory was 172.0MB in the beginning and 369.1MB in the end (delta: 197.1MB). Free memory was 122.3MB in the beginning and 286.2MB in the end (delta: -163.9MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. [2022-07-23 05:44:33,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory was 70.4MB in the beginning and 70.3MB in the end (delta: 44.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.90ms. Allocated memory was 111.1MB in the beginning and 172.0MB in the end (delta: 60.8MB). Free memory was 82.3MB in the beginning and 140.6MB in the end (delta: -58.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.00ms. Allocated memory is still 172.0MB. Free memory was 140.6MB in the beginning and 138.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.55ms. Allocated memory is still 172.0MB. Free memory was 138.4MB in the beginning and 137.5MB in the end (delta: 870.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 388.31ms. Allocated memory is still 172.0MB. Free memory was 137.0MB in the beginning and 122.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 27633.29ms. Allocated memory was 172.0MB in the beginning and 369.1MB in the end (delta: 197.1MB). Free memory was 122.3MB in the beginning and 286.2MB in the end (delta: -163.9MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-23 05:44:33,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:44:34,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:44:34,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:44:34,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:44:34,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:44:34,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:44:34,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:44:34,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:44:34,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:44:35,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:44:35,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:44:35,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:44:35,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:44:35,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:44:35,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:44:35,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:44:35,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:44:35,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:44:35,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:44:35,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:44:35,016 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:44:35,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:44:35,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:44:35,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:44:35,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:44:35,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:44:35,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:44:35,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:44:35,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:44:35,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:44:35,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:44:35,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:44:35,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:44:35,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:44:35,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:44:35,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:44:35,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:44:35,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:44:35,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:44:35,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:44:35,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:44:35,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:44:35,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 05:44:35,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:44:35,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:44:35,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:44:35,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:44:35,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:44:35,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:44:35,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:44:35,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:44:35,061 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:44:35,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:44:35,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:44:35,062 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:44:35,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:44:35,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:44:35,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:44:35,062 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:44:35,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:44:35,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:44:35,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:44:35,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:44:35,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:44:35,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:44:35,064 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 05:44:35,064 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 05:44:35,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 05:44:35,064 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2022-07-23 05:44:35,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:44:35,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:44:35,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:44:35,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:44:35,366 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:44:35,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-23 05:44:35,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/374a6e559/fa9a7f24f46b48dc833b2b846f39df86/FLAG70504b9c2 [2022-07-23 05:44:35,808 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:44:35,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-23 05:44:35,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/374a6e559/fa9a7f24f46b48dc833b2b846f39df86/FLAG70504b9c2 [2022-07-23 05:44:36,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/374a6e559/fa9a7f24f46b48dc833b2b846f39df86 [2022-07-23 05:44:36,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:44:36,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:44:36,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:44:36,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:44:36,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:44:36,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1c3a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36, skipping insertion in model container [2022-07-23 05:44:36,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:44:36,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:44:36,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:44:36,553 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:44:36,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:44:36,593 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:44:36,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36 WrapperNode [2022-07-23 05:44:36,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:44:36,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:44:36,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:44:36,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:44:36,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,627 INFO L137 Inliner]: procedures = 118, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2022-07-23 05:44:36,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:44:36,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:44:36,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:44:36,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:44:36,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:44:36,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:44:36,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:44:36,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:44:36,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (1/1) ... [2022-07-23 05:44:36,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:44:36,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:36,700 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) [2022-07-23 05:44:36,710 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 [2022-07-23 05:44:36,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-23 05:44:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:44:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-23 05:44:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:44:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:44:36,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:44:36,838 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:44:36,839 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:44:37,044 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:44:37,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:44:37,049 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 05:44:37,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:44:37 BoogieIcfgContainer [2022-07-23 05:44:37,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:44:37,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:44:37,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:44:37,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:44:37,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:44:36" (1/3) ... [2022-07-23 05:44:37,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64527973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:44:37, skipping insertion in model container [2022-07-23 05:44:37,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:36" (2/3) ... [2022-07-23 05:44:37,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64527973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:44:37, skipping insertion in model container [2022-07-23 05:44:37,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:44:37" (3/3) ... [2022-07-23 05:44:37,055 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2022-07-23 05:44:37,065 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:44:37,065 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-23 05:44:37,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:44:37,112 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@3edf9a66, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77d34047 [2022-07-23 05:44:37,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-23 05:44:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:44:37,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:37,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:37,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:37,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-23 05:44:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:37,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721200605] [2022-07-23 05:44:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:37,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:37,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:37,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 05:44:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:44:37,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:37,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:37,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:37,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721200605] [2022-07-23 05:44:37,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721200605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:37,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:37,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184478044] [2022-07-23 05:44:37,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:37,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:37,293 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:37,372 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-07-23 05:44:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:44:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:37,380 INFO L225 Difference]: With dead ends: 96 [2022-07-23 05:44:37,381 INFO L226 Difference]: Without dead ends: 92 [2022-07-23 05:44:37,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:37,384 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:37,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-23 05:44:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2022-07-23 05:44:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-23 05:44:37,406 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-23 05:44:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:37,406 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-23 05:44:37,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-23 05:44:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:44:37,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:37,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:37,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:37,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:37,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-23 05:44:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:37,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988547317] [2022-07-23 05:44:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:37,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:37,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:37,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:37,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 05:44:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:37,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 05:44:37,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:37,728 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 05:44:37,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2022-07-23 05:44:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:37,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:37,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988547317] [2022-07-23 05:44:37,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988547317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:37,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:37,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:44:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109149995] [2022-07-23 05:44:37,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:37,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:44:37,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:44:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:37,750 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:37,813 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-07-23 05:44:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:44:37,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:44:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:37,816 INFO L225 Difference]: With dead ends: 51 [2022-07-23 05:44:37,817 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:44:37,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:37,819 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:37,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:44:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-23 05:44:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-23 05:44:37,837 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-23 05:44:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:37,838 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-23 05:44:37,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-23 05:44:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:44:37,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:37,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:37,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:38,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:38,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-23 05:44:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:38,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822850823] [2022-07-23 05:44:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:38,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:38,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:38,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 05:44:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:44:38,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:38,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:38,129 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 10 treesize of output 8 [2022-07-23 05:44:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:38,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:38,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822850823] [2022-07-23 05:44:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822850823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:38,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:38,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084577638] [2022-07-23 05:44:38,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:38,148 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:38,302 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-07-23 05:44:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:44:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:38,304 INFO L225 Difference]: With dead ends: 93 [2022-07-23 05:44:38,304 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 05:44:38,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:38,305 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:38,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 65 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 05:44:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-07-23 05:44:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-23 05:44:38,309 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2022-07-23 05:44:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:38,309 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-23 05:44:38,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-23 05:44:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:38,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:38,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:38,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:38,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:38,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-23 05:44:38,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:38,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250601391] [2022-07-23 05:44:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:38,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:38,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:38,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 05:44:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:44:38,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:38,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:38,583 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 10 treesize of output 8 [2022-07-23 05:44:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:38,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:38,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:38,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250601391] [2022-07-23 05:44:38,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250601391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:38,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:38,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:38,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500744302] [2022-07-23 05:44:38,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:38,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:38,616 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:38,725 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-07-23 05:44:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:38,726 INFO L225 Difference]: With dead ends: 90 [2022-07-23 05:44:38,726 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 05:44:38,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:38,727 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 44 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:38,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 05:44:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2022-07-23 05:44:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-07-23 05:44:38,730 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 9 [2022-07-23 05:44:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:38,730 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-07-23 05:44:38,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-07-23 05:44:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:38,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:38,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:38,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:38,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:38,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-23 05:44:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:38,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025418101] [2022-07-23 05:44:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:38,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:38,945 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:38,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 05:44:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:44:38,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:39,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:39,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025418101] [2022-07-23 05:44:39,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025418101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:39,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:39,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:39,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757856865] [2022-07-23 05:44:39,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:39,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:39,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:39,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:39,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:39,003 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:39,045 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2022-07-23 05:44:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:39,048 INFO L225 Difference]: With dead ends: 105 [2022-07-23 05:44:39,049 INFO L226 Difference]: Without dead ends: 105 [2022-07-23 05:44:39,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:39,049 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:39,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-23 05:44:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2022-07-23 05:44:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2022-07-23 05:44:39,054 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 9 [2022-07-23 05:44:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:39,054 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2022-07-23 05:44:39,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2022-07-23 05:44:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:39,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:39,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:39,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:39,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:39,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:39,262 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-23 05:44:39,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:39,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469090422] [2022-07-23 05:44:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:39,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:39,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:39,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:39,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 05:44:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:39,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:44:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:39,337 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:44:39,337 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-23 05:44:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:39,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:39,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469090422] [2022-07-23 05:44:39,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469090422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:39,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:39,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:44:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682566170] [2022-07-23 05:44:39,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:44:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:44:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:39,367 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:39,417 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-07-23 05:44:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:44:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:39,418 INFO L225 Difference]: With dead ends: 70 [2022-07-23 05:44:39,418 INFO L226 Difference]: Without dead ends: 70 [2022-07-23 05:44:39,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:39,419 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:39,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-23 05:44:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-07-23 05:44:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-23 05:44:39,422 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 9 [2022-07-23 05:44:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:39,422 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-23 05:44:39,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-23 05:44:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:39,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:39,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:39,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:39,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:39,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-23 05:44:39,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:39,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452568608] [2022-07-23 05:44:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:39,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:39,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:39,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:39,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 05:44:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:44:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:39,719 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:39,720 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:39,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:39,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452568608] [2022-07-23 05:44:39,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452568608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:39,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:39,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782883321] [2022-07-23 05:44:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:39,768 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:39,909 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2022-07-23 05:44:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:39,910 INFO L225 Difference]: With dead ends: 109 [2022-07-23 05:44:39,910 INFO L226 Difference]: Without dead ends: 109 [2022-07-23 05:44:39,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:39,911 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 166 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:39,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 66 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-23 05:44:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2022-07-23 05:44:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-07-23 05:44:39,914 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 9 [2022-07-23 05:44:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:39,915 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-07-23 05:44:39,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-07-23 05:44:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:44:39,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:39,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:39,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-23 05:44:40,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:40,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-07-23 05:44:40,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:40,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927387980] [2022-07-23 05:44:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:40,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:40,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:40,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:40,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 05:44:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:44:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:40,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:40,184 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 10 treesize of output 8 [2022-07-23 05:44:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:40,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:40,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927387980] [2022-07-23 05:44:40,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927387980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:40,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:40,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525224198] [2022-07-23 05:44:40,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:40,246 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:40,411 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2022-07-23 05:44:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:44:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:40,412 INFO L225 Difference]: With dead ends: 117 [2022-07-23 05:44:40,412 INFO L226 Difference]: Without dead ends: 117 [2022-07-23 05:44:40,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:40,413 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 171 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:40,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-23 05:44:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2022-07-23 05:44:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-07-23 05:44:40,416 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 9 [2022-07-23 05:44:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:40,416 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-07-23 05:44:40,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-07-23 05:44:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:44:40,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:40,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:40,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-23 05:44:40,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:40,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-23 05:44:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:40,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000169223] [2022-07-23 05:44:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:40,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:40,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:40,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 05:44:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:44:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:40,691 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:40,692 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:40,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:40,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000169223] [2022-07-23 05:44:40,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000169223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:40,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:40,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758010924] [2022-07-23 05:44:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:40,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:40,722 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:40,813 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-07-23 05:44:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:44:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:40,814 INFO L225 Difference]: With dead ends: 105 [2022-07-23 05:44:40,814 INFO L226 Difference]: Without dead ends: 105 [2022-07-23 05:44:40,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:40,815 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:40,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 108 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-23 05:44:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2022-07-23 05:44:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 76 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-07-23 05:44:40,818 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 10 [2022-07-23 05:44:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:40,818 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-07-23 05:44:40,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-07-23 05:44:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:44:40,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:40,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:40,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:41,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:41,029 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:41,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-07-23 05:44:41,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:41,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995600530] [2022-07-23 05:44:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:41,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:41,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:41,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 05:44:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:44:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:41,144 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:41,144 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:41,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:41,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:41,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995600530] [2022-07-23 05:44:41,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995600530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:41,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:41,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:41,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114306779] [2022-07-23 05:44:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:41,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:41,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:41,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:41,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:41,257 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:41,461 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-07-23 05:44:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:44:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:44:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:41,462 INFO L225 Difference]: With dead ends: 110 [2022-07-23 05:44:41,462 INFO L226 Difference]: Without dead ends: 110 [2022-07-23 05:44:41,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:41,463 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 193 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:41,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 80 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-23 05:44:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2022-07-23 05:44:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-07-23 05:44:41,465 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 10 [2022-07-23 05:44:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:41,466 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-07-23 05:44:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-07-23 05:44:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:44:41,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:41,466 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:41,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-07-23 05:44:41,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:41,679 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:41,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-23 05:44:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:41,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274371266] [2022-07-23 05:44:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:41,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:41,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:41,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 05:44:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:44:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:41,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:41,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:41,801 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 10 treesize of output 8 [2022-07-23 05:44:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:41,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:42,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:44:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:42,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:42,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274371266] [2022-07-23 05:44:42,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274371266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:42,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:44:42,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-07-23 05:44:42,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398611228] [2022-07-23 05:44:42,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:42,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:44:42,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:44:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:42,396 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:43,518 INFO L93 Difference]: Finished difference Result 202 states and 236 transitions. [2022-07-23 05:44:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:44:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:44:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:43,521 INFO L225 Difference]: With dead ends: 202 [2022-07-23 05:44:43,521 INFO L226 Difference]: Without dead ends: 202 [2022-07-23 05:44:43,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:44:43,521 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 472 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:43,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 230 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:44:43,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-23 05:44:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 97. [2022-07-23 05:44:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 83 states have (on average 1.4337349397590362) internal successors, (119), 96 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-07-23 05:44:43,525 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 11 [2022-07-23 05:44:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:43,525 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-07-23 05:44:43,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-07-23 05:44:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:44:43,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:43,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:43,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:43,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:43,726 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-23 05:44:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:43,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748723494] [2022-07-23 05:44:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:43,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:43,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:43,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 05:44:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:43,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:44:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:43,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:43,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:43,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748723494] [2022-07-23 05:44:43,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748723494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:43,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:43,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:43,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923364081] [2022-07-23 05:44:43,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:43,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:43,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:43,862 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:44,024 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2022-07-23 05:44:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-23 05:44:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:44,026 INFO L225 Difference]: With dead ends: 159 [2022-07-23 05:44:44,026 INFO L226 Difference]: Without dead ends: 159 [2022-07-23 05:44:44,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:44:44,026 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 218 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:44,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 155 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-23 05:44:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 110. [2022-07-23 05:44:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 109 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2022-07-23 05:44:44,029 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 12 [2022-07-23 05:44:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:44,029 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2022-07-23 05:44:44,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2022-07-23 05:44:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:44:44,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:44,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:44,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:44,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:44,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-23 05:44:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669621825] [2022-07-23 05:44:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:44,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:44,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:44,233 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:44,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 05:44:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:44:44,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:44,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:44,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:44,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669621825] [2022-07-23 05:44:44,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669621825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:44,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287137851] [2022-07-23 05:44:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:44,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:44,290 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:44,358 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-07-23 05:44:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-23 05:44:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:44,359 INFO L225 Difference]: With dead ends: 109 [2022-07-23 05:44:44,359 INFO L226 Difference]: Without dead ends: 109 [2022-07-23 05:44:44,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:44,359 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:44,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 49 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-23 05:44:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-23 05:44:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.3958333333333333) internal successors, (134), 108 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2022-07-23 05:44:44,364 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 12 [2022-07-23 05:44:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:44,364 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2022-07-23 05:44:44,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2022-07-23 05:44:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:44:44,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:44,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:44,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:44,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:44,567 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:44,567 INFO L85 PathProgramCache]: Analyzing trace with hash -857651139, now seen corresponding path program 1 times [2022-07-23 05:44:44,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:44,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497943749] [2022-07-23 05:44:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:44,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:44,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:44,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:44,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 05:44:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:44,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:44:44,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:44,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:44,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497943749] [2022-07-23 05:44:44,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497943749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:44,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:44,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:44,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450362080] [2022-07-23 05:44:44,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:44,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:44,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:44,701 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:44,731 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-07-23 05:44:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:44,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-23 05:44:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:44,732 INFO L225 Difference]: With dead ends: 110 [2022-07-23 05:44:44,732 INFO L226 Difference]: Without dead ends: 110 [2022-07-23 05:44:44,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:44,733 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:44,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 127 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-07-23 05:44:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-23 05:44:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-07-23 05:44:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 84 states have (on average 1.4166666666666667) internal successors, (119), 96 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-07-23 05:44:44,736 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 12 [2022-07-23 05:44:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:44,736 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-07-23 05:44:44,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-07-23 05:44:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:44:44,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:44,737 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:44,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:44,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:44,937 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:44,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-23 05:44:44,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:44,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047603799] [2022-07-23 05:44:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:44,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:44,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:44,939 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:44,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 05:44:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:44,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:44:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:44,999 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:45,000 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:45,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:45,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:45,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047603799] [2022-07-23 05:44:45,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047603799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:45,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:44:45,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-07-23 05:44:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005025201] [2022-07-23 05:44:45,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:45,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:44:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:44:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:45,566 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:46,186 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-07-23 05:44:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:44:46,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:44:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:46,188 INFO L225 Difference]: With dead ends: 168 [2022-07-23 05:44:46,188 INFO L226 Difference]: Without dead ends: 168 [2022-07-23 05:44:46,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:44:46,189 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 465 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:46,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 174 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:44:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-23 05:44:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 92. [2022-07-23 05:44:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.3875) internal successors, (111), 91 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-07-23 05:44:46,191 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 13 [2022-07-23 05:44:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:46,191 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-07-23 05:44:46,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-07-23 05:44:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:44:46,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:46,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:46,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-23 05:44:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:46,398 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 172811107, now seen corresponding path program 1 times [2022-07-23 05:44:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:46,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397587706] [2022-07-23 05:44:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:46,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:46,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:46,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:46,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 05:44:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:46,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:44:46,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:46,457 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:44:46,458 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-23 05:44:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:46,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:46,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397587706] [2022-07-23 05:44:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397587706] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:46,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:46,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388851536] [2022-07-23 05:44:46,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:46,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:46,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:46,482 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:46,559 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-07-23 05:44:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:46,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:44:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:46,560 INFO L225 Difference]: With dead ends: 92 [2022-07-23 05:44:46,560 INFO L226 Difference]: Without dead ends: 92 [2022-07-23 05:44:46,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:46,560 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:46,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 68 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-23 05:44:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-07-23 05:44:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.35) internal successors, (108), 88 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-07-23 05:44:46,562 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 14 [2022-07-23 05:44:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:46,562 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-07-23 05:44:46,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-07-23 05:44:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:44:46,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:46,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:46,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-23 05:44:46,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:46,763 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash 172811108, now seen corresponding path program 1 times [2022-07-23 05:44:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:46,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963644214] [2022-07-23 05:44:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:46,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:46,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:46,765 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:46,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 05:44:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:44:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:46,858 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:46,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:46,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:46,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:46,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963644214] [2022-07-23 05:44:46,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963644214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:46,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:46,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194636181] [2022-07-23 05:44:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:46,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:46,923 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:47,089 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2022-07-23 05:44:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:44:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:44:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:47,090 INFO L225 Difference]: With dead ends: 135 [2022-07-23 05:44:47,090 INFO L226 Difference]: Without dead ends: 135 [2022-07-23 05:44:47,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:44:47,091 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:47,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 163 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-23 05:44:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-07-23 05:44:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 104 states have (on average 1.4134615384615385) internal successors, (147), 112 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2022-07-23 05:44:47,093 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 14 [2022-07-23 05:44:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:47,093 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2022-07-23 05:44:47,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2022-07-23 05:44:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:44:47,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:47,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:47,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:47,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:47,302 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:47,303 INFO L85 PathProgramCache]: Analyzing trace with hash 873875686, now seen corresponding path program 1 times [2022-07-23 05:44:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:47,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794192867] [2022-07-23 05:44:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:47,304 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:47,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 05:44:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:44:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:47,381 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:44:47,382 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:44:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:47,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:47,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794192867] [2022-07-23 05:44:47,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794192867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:47,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:47,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:47,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088703142] [2022-07-23 05:44:47,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:47,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:47,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:47,439 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:47,645 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2022-07-23 05:44:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:44:47,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:44:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:47,646 INFO L225 Difference]: With dead ends: 134 [2022-07-23 05:44:47,646 INFO L226 Difference]: Without dead ends: 134 [2022-07-23 05:44:47,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:44:47,647 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:47,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 75 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-23 05:44:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2022-07-23 05:44:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 96 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2022-07-23 05:44:47,650 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 14 [2022-07-23 05:44:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:47,650 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2022-07-23 05:44:47,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2022-07-23 05:44:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:44:47,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:47,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:47,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:47,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:47,856 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:47,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1432273078, now seen corresponding path program 1 times [2022-07-23 05:44:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:47,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369638163] [2022-07-23 05:44:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:47,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:47,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:47,858 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:47,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 05:44:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:47,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:44:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:50,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:50,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369638163] [2022-07-23 05:44:50,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369638163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:50,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:50,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275602806] [2022-07-23 05:44:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:50,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:50,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:44:50,060 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:50,083 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-07-23 05:44:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-23 05:44:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:50,083 INFO L225 Difference]: With dead ends: 111 [2022-07-23 05:44:50,083 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 05:44:50,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:44:50,084 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:50,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-07-23 05:44:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 05:44:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-07-23 05:44:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 105 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2022-07-23 05:44:50,086 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 16 [2022-07-23 05:44:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:50,086 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2022-07-23 05:44:50,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2022-07-23 05:44:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:44:50,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:50,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:50,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-23 05:44:50,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:50,307 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1532417320, now seen corresponding path program 1 times [2022-07-23 05:44:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:50,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667636971] [2022-07-23 05:44:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:50,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:50,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:50,310 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:50,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 05:44:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:44:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:50,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:50,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:44:50,426 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 10 treesize of output 8 [2022-07-23 05:44:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:50,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:51,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:44:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:51,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:51,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667636971] [2022-07-23 05:44:51,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667636971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:51,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:44:51,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-23 05:44:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622395238] [2022-07-23 05:44:51,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:51,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:44:51,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:44:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:44:51,484 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:51,942 INFO L93 Difference]: Finished difference Result 214 states and 261 transitions. [2022-07-23 05:44:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:44:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:44:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:51,943 INFO L225 Difference]: With dead ends: 214 [2022-07-23 05:44:51,943 INFO L226 Difference]: Without dead ends: 214 [2022-07-23 05:44:51,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:44:51,944 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 453 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:51,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 302 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:44:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-23 05:44:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 97. [2022-07-23 05:44:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.348314606741573) internal successors, (120), 96 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2022-07-23 05:44:51,946 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 17 [2022-07-23 05:44:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:51,946 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2022-07-23 05:44:51,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2022-07-23 05:44:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:44:51,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:51,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:51,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:52,148 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954455, now seen corresponding path program 1 times [2022-07-23 05:44:52,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:52,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727967053] [2022-07-23 05:44:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:52,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:52,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:52,150 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:52,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 05:44:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:52,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 05:44:52,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:52,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:52,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:52,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727967053] [2022-07-23 05:44:52,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727967053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:52,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:52,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972767101] [2022-07-23 05:44:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:52,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:52,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:52,238 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:52,317 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2022-07-23 05:44:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:44:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:52,320 INFO L225 Difference]: With dead ends: 99 [2022-07-23 05:44:52,320 INFO L226 Difference]: Without dead ends: 99 [2022-07-23 05:44:52,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:52,321 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 64 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:52,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-23 05:44:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-23 05:44:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 95 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-07-23 05:44:52,327 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 18 [2022-07-23 05:44:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:52,327 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-07-23 05:44:52,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-07-23 05:44:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:44:52,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:52,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:52,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:52,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:52,533 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954454, now seen corresponding path program 1 times [2022-07-23 05:44:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:52,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621366878] [2022-07-23 05:44:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:52,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:52,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:52,535 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:52,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 05:44:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:52,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:44:52,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:52,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:52,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621366878] [2022-07-23 05:44:52,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621366878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:52,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:52,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:44:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866436177] [2022-07-23 05:44:52,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:44:52,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:44:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:52,665 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:52,887 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-07-23 05:44:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:44:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:52,888 INFO L225 Difference]: With dead ends: 178 [2022-07-23 05:44:52,888 INFO L226 Difference]: Without dead ends: 178 [2022-07-23 05:44:52,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:52,889 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 186 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:52,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 199 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-23 05:44:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 119. [2022-07-23 05:44:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 118 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2022-07-23 05:44:52,891 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 18 [2022-07-23 05:44:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:52,891 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2022-07-23 05:44:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2022-07-23 05:44:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:44:52,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:52,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:52,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:53,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:53,094 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2001945381, now seen corresponding path program 1 times [2022-07-23 05:44:53,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:53,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806960149] [2022-07-23 05:44:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:53,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:53,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:53,097 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:53,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 05:44:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 05:44:53,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:53,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:53,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806960149] [2022-07-23 05:44:53,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806960149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:53,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:53,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523818660] [2022-07-23 05:44:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:44:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:44:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:53,157 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:53,179 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-07-23 05:44:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:44:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:44:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:53,180 INFO L225 Difference]: With dead ends: 121 [2022-07-23 05:44:53,180 INFO L226 Difference]: Without dead ends: 121 [2022-07-23 05:44:53,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:53,181 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:53,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-23 05:44:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-23 05:44:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 120 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 147 transitions. [2022-07-23 05:44:53,192 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 147 transitions. Word has length 18 [2022-07-23 05:44:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:53,192 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 147 transitions. [2022-07-23 05:44:53,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 147 transitions. [2022-07-23 05:44:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:44:53,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:53,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:53,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:53,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:53,394 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:53,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1271944488, now seen corresponding path program 1 times [2022-07-23 05:44:53,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:53,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852114259] [2022-07-23 05:44:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:53,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:53,396 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:53,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 05:44:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:44:53,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:53,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:53,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:53,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852114259] [2022-07-23 05:44:53,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852114259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:53,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:53,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:44:53,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973948005] [2022-07-23 05:44:53,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:53,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:53,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:53,525 INFO L87 Difference]: Start difference. First operand 121 states and 147 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:53,720 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2022-07-23 05:44:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:44:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:53,721 INFO L225 Difference]: With dead ends: 160 [2022-07-23 05:44:53,721 INFO L226 Difference]: Without dead ends: 160 [2022-07-23 05:44:53,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:44:53,723 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 116 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:53,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 126 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-23 05:44:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 104. [2022-07-23 05:44:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 103 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2022-07-23 05:44:53,728 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 18 [2022-07-23 05:44:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:53,729 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2022-07-23 05:44:53,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2022-07-23 05:44:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:44:53,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:53,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:53,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:53,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:53,937 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash 275803338, now seen corresponding path program 1 times [2022-07-23 05:44:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:53,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691335442] [2022-07-23 05:44:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:53,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:53,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:53,939 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 05:44:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:44:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:54,052 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 18 treesize of output 10 [2022-07-23 05:44:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:54,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:54,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:54,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691335442] [2022-07-23 05:44:54,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691335442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:54,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:54,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:44:54,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396989342] [2022-07-23 05:44:54,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:54,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:44:54,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:54,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:44:54,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:44:54,065 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:54,187 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2022-07-23 05:44:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-23 05:44:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:54,188 INFO L225 Difference]: With dead ends: 108 [2022-07-23 05:44:54,188 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 05:44:54,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:44:54,189 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:54,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-07-23 05:44:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 05:44:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-07-23 05:44:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 100 states have (on average 1.32) internal successors, (132), 106 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2022-07-23 05:44:54,191 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 20 [2022-07-23 05:44:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:54,191 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2022-07-23 05:44:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2022-07-23 05:44:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:44:54,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:54,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:54,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:54,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:54,392 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1660821207, now seen corresponding path program 1 times [2022-07-23 05:44:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:54,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094533214] [2022-07-23 05:44:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:54,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:54,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:54,394 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:54,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 05:44:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:44:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:56,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:56,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:56,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094533214] [2022-07-23 05:44:56,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094533214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:56,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:56,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244184008] [2022-07-23 05:44:56,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:44:56,611 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:56,652 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2022-07-23 05:44:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:56,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-23 05:44:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:56,652 INFO L225 Difference]: With dead ends: 120 [2022-07-23 05:44:56,653 INFO L226 Difference]: Without dead ends: 117 [2022-07-23 05:44:56,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:44:56,653 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:56,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 122 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-07-23 05:44:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-23 05:44:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-07-23 05:44:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 109 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2022-07-23 05:44:56,655 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 20 [2022-07-23 05:44:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:56,655 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2022-07-23 05:44:56,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2022-07-23 05:44:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:44:56,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:56,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:56,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-23 05:44:56,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:56,860 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:56,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2028473179, now seen corresponding path program 1 times [2022-07-23 05:44:56,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:56,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955529416] [2022-07-23 05:44:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:56,862 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:56,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 05:44:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:44:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:44:59,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:59,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:59,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955529416] [2022-07-23 05:44:59,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955529416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:59,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:59,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:59,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043467896] [2022-07-23 05:44:59,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:59,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:59,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:59,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:44:59,106 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:59,117 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-07-23 05:44:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-23 05:44:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:59,118 INFO L225 Difference]: With dead ends: 128 [2022-07-23 05:44:59,118 INFO L226 Difference]: Without dead ends: 125 [2022-07-23 05:44:59,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:44:59,119 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:59,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 89 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-07-23 05:44:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-23 05:44:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2022-07-23 05:44:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 102 states have (on average 1.3235294117647058) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-07-23 05:44:59,121 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 20 [2022-07-23 05:44:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:59,121 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-07-23 05:44:59,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:59,121 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-07-23 05:44:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:44:59,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:59,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:59,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:59,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:59,328 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -309239812, now seen corresponding path program 1 times [2022-07-23 05:44:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:59,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942206147] [2022-07-23 05:44:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:59,332 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:59,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 05:44:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:44:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:59,436 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 12 treesize of output 8 [2022-07-23 05:44:59,472 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 [2022-07-23 05:44:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:59,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:44:59,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:44:59,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942206147] [2022-07-23 05:44:59,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942206147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:59,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:59,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:44:59,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438909338] [2022-07-23 05:44:59,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:59,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:44:59,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:44:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:44:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:44:59,491 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:59,653 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2022-07-23 05:44:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:44:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:44:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:59,654 INFO L225 Difference]: With dead ends: 124 [2022-07-23 05:44:59,654 INFO L226 Difference]: Without dead ends: 124 [2022-07-23 05:44:59,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:44:59,654 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:59,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-23 05:44:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2022-07-23 05:44:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.3) internal successors, (143), 116 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2022-07-23 05:44:59,656 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 21 [2022-07-23 05:44:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:59,656 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2022-07-23 05:44:59,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2022-07-23 05:44:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:44:59,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:59,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:59,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:59,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:44:59,857 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:44:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash -40031434, now seen corresponding path program 1 times [2022-07-23 05:44:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:44:59,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034839704] [2022-07-23 05:44:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:59,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:44:59,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:44:59,859 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:44:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 05:44:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:59,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:44:59,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:59,976 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 12 treesize of output 8 [2022-07-23 05:45:00,003 INFO L356 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2022-07-23 05:45:00,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 05:45:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:00,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:00,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:00,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034839704] [2022-07-23 05:45:00,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034839704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:00,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:00,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:45:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774107001] [2022-07-23 05:45:00,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:00,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:45:00,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:45:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:45:00,109 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:00,334 INFO L93 Difference]: Finished difference Result 172 states and 206 transitions. [2022-07-23 05:45:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:45:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:45:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:00,336 INFO L225 Difference]: With dead ends: 172 [2022-07-23 05:45:00,336 INFO L226 Difference]: Without dead ends: 163 [2022-07-23 05:45:00,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:45:00,336 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:00,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 255 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-23 05:45:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-23 05:45:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 115. [2022-07-23 05:45:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 108 states have (on average 1.2962962962962963) internal successors, (140), 114 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2022-07-23 05:45:00,338 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 21 [2022-07-23 05:45:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:00,339 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2022-07-23 05:45:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2022-07-23 05:45:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:45:00,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:00,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:00,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:00,546 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1991582778, now seen corresponding path program 1 times [2022-07-23 05:45:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293279263] [2022-07-23 05:45:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:00,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:00,548 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:00,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 05:45:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 05:45:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:00,646 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:45:00,646 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:45:00,680 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 17 treesize of output 13 [2022-07-23 05:45:00,762 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:45:00,762 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 21 treesize of output 21 [2022-07-23 05:45:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:01,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:01,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-23 05:45:01,528 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 29 treesize of output 27 [2022-07-23 05:45:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:01,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293279263] [2022-07-23 05:45:01,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293279263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:01,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:45:01,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-23 05:45:01,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179174400] [2022-07-23 05:45:01,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:01,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:45:01,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:01,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:45:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:45:01,706 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:03,543 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2022-07-23 05:45:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:45:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:45:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:03,545 INFO L225 Difference]: With dead ends: 154 [2022-07-23 05:45:03,545 INFO L226 Difference]: Without dead ends: 154 [2022-07-23 05:45:03,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=287, Invalid=769, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:45:03,546 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 430 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:03,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 261 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:45:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-23 05:45:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 118. [2022-07-23 05:45:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 117 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2022-07-23 05:45:03,549 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 21 [2022-07-23 05:45:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:03,549 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2022-07-23 05:45:03,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2022-07-23 05:45:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:45:03,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:03,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:03,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:03,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:03,750 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:03,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:03,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2034176140, now seen corresponding path program 1 times [2022-07-23 05:45:03,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:03,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162573521] [2022-07-23 05:45:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:03,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:03,752 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:03,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 05:45:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:45:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:03,828 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 10 treesize of output 8 [2022-07-23 05:45:03,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-07-23 05:45:03,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-23 05:45:03,900 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 [2022-07-23 05:45:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:03,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:03,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:03,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162573521] [2022-07-23 05:45:03,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162573521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:03,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:03,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:45:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796939023] [2022-07-23 05:45:03,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:03,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:45:03,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:45:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:45:03,911 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:04,075 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-07-23 05:45:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:45:04,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:45:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:04,076 INFO L225 Difference]: With dead ends: 128 [2022-07-23 05:45:04,076 INFO L226 Difference]: Without dead ends: 115 [2022-07-23 05:45:04,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:45:04,077 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:04,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:45:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-23 05:45:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-07-23 05:45:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 114 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2022-07-23 05:45:04,078 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 21 [2022-07-23 05:45:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:04,079 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2022-07-23 05:45:04,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2022-07-23 05:45:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:45:04,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:04,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:04,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-23 05:45:04,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:04,280 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1728975176, now seen corresponding path program 1 times [2022-07-23 05:45:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643199431] [2022-07-23 05:45:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:04,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:04,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:04,282 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:04,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 05:45:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:45:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:04,432 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 15 treesize of output 11 [2022-07-23 05:45:04,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:04,473 INFO L356 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2022-07-23 05:45:04,474 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 24 treesize of output 23 [2022-07-23 05:45:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:04,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:04,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:04,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643199431] [2022-07-23 05:45:04,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643199431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:04,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:04,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:45:04,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212388771] [2022-07-23 05:45:04,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:04,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:45:04,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:45:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:45:04,610 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:04,766 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-07-23 05:45:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:45:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:45:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:04,768 INFO L225 Difference]: With dead ends: 123 [2022-07-23 05:45:04,768 INFO L226 Difference]: Without dead ends: 116 [2022-07-23 05:45:04,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:45:04,768 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:04,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-07-23 05:45:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-23 05:45:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-07-23 05:45:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.2727272727272727) internal successors, (140), 114 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2022-07-23 05:45:04,770 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 21 [2022-07-23 05:45:04,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:04,770 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2022-07-23 05:45:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2022-07-23 05:45:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:45:04,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:04,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:04,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-23 05:45:04,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:04,971 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:04,972 INFO L85 PathProgramCache]: Analyzing trace with hash 571847414, now seen corresponding path program 1 times [2022-07-23 05:45:04,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:04,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143752558] [2022-07-23 05:45:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:04,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:04,973 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:04,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 05:45:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 05:45:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:05,196 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 15 treesize of output 11 [2022-07-23 05:45:05,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:05,256 INFO L356 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2022-07-23 05:45:05,256 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 27 treesize of output 26 [2022-07-23 05:45:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:05,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:05,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143752558] [2022-07-23 05:45:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143752558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:05,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:05,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-23 05:45:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060516538] [2022-07-23 05:45:05,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:05,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:45:05,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:45:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:45:05,426 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:05,617 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-07-23 05:45:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:45:05,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:45:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:05,618 INFO L225 Difference]: With dead ends: 126 [2022-07-23 05:45:05,618 INFO L226 Difference]: Without dead ends: 121 [2022-07-23 05:45:05,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:45:05,619 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 63 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:05,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 175 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-07-23 05:45:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-23 05:45:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2022-07-23 05:45:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 115 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2022-07-23 05:45:05,620 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 21 [2022-07-23 05:45:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:05,621 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2022-07-23 05:45:05,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2022-07-23 05:45:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:45:05,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:05,621 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:05,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:05,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:05,821 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash -591263241, now seen corresponding path program 2 times [2022-07-23 05:45:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:05,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239237891] [2022-07-23 05:45:05,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:45:05,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:05,824 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:05,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-23 05:45:05,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:45:05,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:45:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:05,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:45:05,914 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 10 treesize of output 8 [2022-07-23 05:45:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:06,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:07,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:07,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:07,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239237891] [2022-07-23 05:45:07,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239237891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:07,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:45:07,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-23 05:45:07,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749809213] [2022-07-23 05:45:07,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:45:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:45:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:45:07,484 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:10,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 05:45:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:14,116 INFO L93 Difference]: Finished difference Result 746 states and 897 transitions. [2022-07-23 05:45:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:45:14,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:45:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:14,119 INFO L225 Difference]: With dead ends: 746 [2022-07-23 05:45:14,119 INFO L226 Difference]: Without dead ends: 746 [2022-07-23 05:45:14,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:45:14,120 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1380 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:14,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 804 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 681 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-23 05:45:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-07-23 05:45:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 164. [2022-07-23 05:45:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 163 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 201 transitions. [2022-07-23 05:45:14,125 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 201 transitions. Word has length 23 [2022-07-23 05:45:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:14,125 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 201 transitions. [2022-07-23 05:45:14,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 201 transitions. [2022-07-23 05:45:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:45:14,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:14,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:14,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:14,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:14,333 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1040801788, now seen corresponding path program 1 times [2022-07-23 05:45:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000221733] [2022-07-23 05:45:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:14,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:14,335 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:14,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-23 05:45:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:14,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:45:14,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:45:16,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:16,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:16,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000221733] [2022-07-23 05:45:16,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000221733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:16,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:16,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:45:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583428021] [2022-07-23 05:45:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:16,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:45:16,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:45:16,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:45:16,556 INFO L87 Difference]: Start difference. First operand 164 states and 201 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:16,567 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2022-07-23 05:45:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:45:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-23 05:45:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:16,568 INFO L225 Difference]: With dead ends: 167 [2022-07-23 05:45:16,568 INFO L226 Difference]: Without dead ends: 164 [2022-07-23 05:45:16,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:45:16,568 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 101 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-07-23 05:45:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-23 05:45:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 154. [2022-07-23 05:45:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.261744966442953) internal successors, (188), 153 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 188 transitions. [2022-07-23 05:45:16,571 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 188 transitions. Word has length 24 [2022-07-23 05:45:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:16,571 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 188 transitions. [2022-07-23 05:45:16,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 188 transitions. [2022-07-23 05:45:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:45:16,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:16,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:16,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:16,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:16,778 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash -212298053, now seen corresponding path program 1 times [2022-07-23 05:45:16,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:16,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697685346] [2022-07-23 05:45:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:16,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:16,780 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:16,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 05:45:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 05:45:16,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:17,042 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 12 treesize of output 8 [2022-07-23 05:45:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:17,204 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 19 treesize of output 11 [2022-07-23 05:45:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:21,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:21,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:21,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697685346] [2022-07-23 05:45:21,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697685346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:21,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:21,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:45:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845339267] [2022-07-23 05:45:21,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:21,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:45:21,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:45:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=82, Unknown=2, NotChecked=0, Total=110 [2022-07-23 05:45:21,293 INFO L87 Difference]: Start difference. First operand 154 states and 188 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:21,313 INFO L93 Difference]: Finished difference Result 159 states and 192 transitions. [2022-07-23 05:45:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:45:21,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:45:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:21,314 INFO L225 Difference]: With dead ends: 159 [2022-07-23 05:45:21,314 INFO L226 Difference]: Without dead ends: 144 [2022-07-23 05:45:21,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=26, Invalid=82, Unknown=2, NotChecked=0, Total=110 [2022-07-23 05:45:21,314 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:21,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 203 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-07-23 05:45:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-23 05:45:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-23 05:45:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.20863309352518) internal successors, (168), 143 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 168 transitions. [2022-07-23 05:45:21,316 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 168 transitions. Word has length 25 [2022-07-23 05:45:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:21,316 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 168 transitions. [2022-07-23 05:45:21,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 168 transitions. [2022-07-23 05:45:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:45:21,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:21,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:21,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:21,517 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1415909177, now seen corresponding path program 1 times [2022-07-23 05:45:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:21,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421668074] [2022-07-23 05:45:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:21,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:21,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:21,519 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:21,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-23 05:45:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 05:45:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:21,612 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 10 treesize of output 8 [2022-07-23 05:45:21,700 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 15 treesize of output 11 [2022-07-23 05:45:21,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-23 05:45:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:21,789 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:45:21,789 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-07-23 05:45:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:21,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:21,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421668074] [2022-07-23 05:45:21,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421668074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:21,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:21,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:45:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412949237] [2022-07-23 05:45:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:45:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:45:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:45:21,803 INFO L87 Difference]: Start difference. First operand 144 states and 168 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:21,906 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2022-07-23 05:45:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:45:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:45:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:21,907 INFO L225 Difference]: With dead ends: 153 [2022-07-23 05:45:21,907 INFO L226 Difference]: Without dead ends: 142 [2022-07-23 05:45:21,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:45:21,907 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:21,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 176 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-07-23 05:45:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-23 05:45:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-07-23 05:45:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.2043795620437956) internal successors, (165), 141 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 165 transitions. [2022-07-23 05:45:21,909 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 165 transitions. Word has length 25 [2022-07-23 05:45:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:21,909 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 165 transitions. [2022-07-23 05:45:21,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 165 transitions. [2022-07-23 05:45:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:45:21,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:21,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:21,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-23 05:45:22,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:22,110 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 6556665, now seen corresponding path program 1 times [2022-07-23 05:45:22,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:22,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265798752] [2022-07-23 05:45:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:22,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:22,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:22,112 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:22,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-23 05:45:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:45:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:22,485 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 19 treesize of output 11 [2022-07-23 05:45:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:25,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:25,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265798752] [2022-07-23 05:45:25,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265798752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:25,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:25,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:45:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872969584] [2022-07-23 05:45:25,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:45:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:45:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-23 05:45:25,310 INFO L87 Difference]: Start difference. First operand 142 states and 165 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:25,314 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2022-07-23 05:45:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:45:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:45:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:25,315 INFO L225 Difference]: With dead ends: 158 [2022-07-23 05:45:25,315 INFO L226 Difference]: Without dead ends: 153 [2022-07-23 05:45:25,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-23 05:45:25,316 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:25,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 215 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-07-23 05:45:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-23 05:45:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2022-07-23 05:45:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 150 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2022-07-23 05:45:25,318 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 25 [2022-07-23 05:45:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:25,318 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2022-07-23 05:45:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2022-07-23 05:45:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:45:25,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:25,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:25,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:25,525 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash 994740142, now seen corresponding path program 1 times [2022-07-23 05:45:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:25,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346468500] [2022-07-23 05:45:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:25,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:25,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:25,527 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:25,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-23 05:45:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:45:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:25,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:26,050 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 24 treesize of output 20 [2022-07-23 05:45:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:26,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:26,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346468500] [2022-07-23 05:45:26,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346468500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:26,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:45:26,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-23 05:45:26,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528645286] [2022-07-23 05:45:26,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:26,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:45:26,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:45:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:45:26,217 INFO L87 Difference]: Start difference. First operand 151 states and 175 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:26,344 INFO L93 Difference]: Finished difference Result 177 states and 209 transitions. [2022-07-23 05:45:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:45:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 05:45:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:26,346 INFO L225 Difference]: With dead ends: 177 [2022-07-23 05:45:26,346 INFO L226 Difference]: Without dead ends: 177 [2022-07-23 05:45:26,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:45:26,346 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:26,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 163 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-07-23 05:45:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-23 05:45:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2022-07-23 05:45:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2289156626506024) internal successors, (204), 170 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2022-07-23 05:45:26,349 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 27 [2022-07-23 05:45:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:26,349 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2022-07-23 05:45:26,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2022-07-23 05:45:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:45:26,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:26,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:26,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:26,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:26,556 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 772173010, now seen corresponding path program 1 times [2022-07-23 05:45:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:26,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970236441] [2022-07-23 05:45:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:26,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:26,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:26,558 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:26,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-23 05:45:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:45:26,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:26,665 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 [2022-07-23 05:45:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:26,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:26,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:26,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970236441] [2022-07-23 05:45:26,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970236441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:26,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:26,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:45:26,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245991851] [2022-07-23 05:45:26,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:26,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:45:26,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:45:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:45:26,678 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:26,809 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2022-07-23 05:45:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:45:26,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-23 05:45:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:26,810 INFO L225 Difference]: With dead ends: 171 [2022-07-23 05:45:26,810 INFO L226 Difference]: Without dead ends: 171 [2022-07-23 05:45:26,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:45:26,811 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:26,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 132 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-07-23 05:45:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-23 05:45:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-07-23 05:45:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.216867469879518) internal successors, (202), 170 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2022-07-23 05:45:26,813 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 28 [2022-07-23 05:45:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:26,813 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2022-07-23 05:45:26,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2022-07-23 05:45:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:45:26,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:26,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:26,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:27,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:27,014 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:27,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1799106235, now seen corresponding path program 1 times [2022-07-23 05:45:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:27,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391996134] [2022-07-23 05:45:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:27,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:27,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:27,016 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:27,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-23 05:45:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:27,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:45:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:27,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:27,608 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 24 treesize of output 20 [2022-07-23 05:45:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:27,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:27,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391996134] [2022-07-23 05:45:27,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391996134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:27,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:45:27,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-07-23 05:45:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706364135] [2022-07-23 05:45:27,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:27,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:45:27,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:45:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:45:27,780 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:27,932 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2022-07-23 05:45:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:45:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-23 05:45:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:27,934 INFO L225 Difference]: With dead ends: 176 [2022-07-23 05:45:27,934 INFO L226 Difference]: Without dead ends: 176 [2022-07-23 05:45:27,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:45:27,934 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:27,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 332 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-07-23 05:45:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-23 05:45:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2022-07-23 05:45:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 170 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2022-07-23 05:45:27,936 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 29 [2022-07-23 05:45:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:27,936 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2022-07-23 05:45:27,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2022-07-23 05:45:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:45:27,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:27,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:27,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:28,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:28,137 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1107898044, now seen corresponding path program 1 times [2022-07-23 05:45:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:28,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180867026] [2022-07-23 05:45:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:28,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:28,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:28,139 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:28,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-23 05:45:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:45:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:28,574 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 19 treesize of output 11 [2022-07-23 05:45:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:45:31,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:31,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180867026] [2022-07-23 05:45:31,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180867026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:31,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:31,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:45:31,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031205197] [2022-07-23 05:45:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:31,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:45:31,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:45:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-23 05:45:31,383 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:31,393 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2022-07-23 05:45:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:45:31,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-23 05:45:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:31,393 INFO L225 Difference]: With dead ends: 176 [2022-07-23 05:45:31,393 INFO L226 Difference]: Without dead ends: 171 [2022-07-23 05:45:31,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-23 05:45:31,394 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:31,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-07-23 05:45:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-23 05:45:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2022-07-23 05:45:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2101910828025477) internal successors, (190), 161 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2022-07-23 05:45:31,396 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 29 [2022-07-23 05:45:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:31,396 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2022-07-23 05:45:31,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2022-07-23 05:45:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:45:31,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:31,396 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-23 05:45:31,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:31,597 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash -28905095, now seen corresponding path program 1 times [2022-07-23 05:45:31,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:31,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115426603] [2022-07-23 05:45:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:31,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:31,605 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:31,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-23 05:45:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:45:31,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:31,747 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 15 treesize of output 11 [2022-07-23 05:45:31,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:31,839 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:45:31,839 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 12 [2022-07-23 05:45:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:31,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:45:31,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:31,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115426603] [2022-07-23 05:45:31,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115426603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:45:31,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:45:31,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:45:31,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483476670] [2022-07-23 05:45:31,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:31,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:45:31,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:45:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:45:31,865 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:31,955 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2022-07-23 05:45:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:45:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-23 05:45:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:31,956 INFO L225 Difference]: With dead ends: 174 [2022-07-23 05:45:31,956 INFO L226 Difference]: Without dead ends: 166 [2022-07-23 05:45:31,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:45:31,957 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:31,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 197 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 46 Unchecked, 0.0s Time] [2022-07-23 05:45:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-23 05:45:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2022-07-23 05:45:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.2088607594936709) internal successors, (191), 162 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 191 transitions. [2022-07-23 05:45:31,959 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 191 transitions. Word has length 31 [2022-07-23 05:45:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:31,959 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 191 transitions. [2022-07-23 05:45:31,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 191 transitions. [2022-07-23 05:45:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:45:31,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:31,960 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-23 05:45:31,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:32,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:32,160 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1888897540, now seen corresponding path program 1 times [2022-07-23 05:45:32,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:32,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538348819] [2022-07-23 05:45:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:32,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:32,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:32,163 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:32,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-23 05:45:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:32,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 05:45:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:32,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:32,652 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 17 treesize of output 9 [2022-07-23 05:45:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:45:36,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:36,896 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-23 05:45:36,896 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 15 treesize of output 15 [2022-07-23 05:45:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:45:49,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:49,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538348819] [2022-07-23 05:45:49,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538348819] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:49,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:45:49,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2022-07-23 05:45:49,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902522413] [2022-07-23 05:45:49,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:45:49,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:45:49,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:45:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=186, Unknown=7, NotChecked=0, Total=272 [2022-07-23 05:45:49,683 INFO L87 Difference]: Start difference. First operand 163 states and 191 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:49,736 INFO L93 Difference]: Finished difference Result 162 states and 190 transitions. [2022-07-23 05:45:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:45:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-23 05:45:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:49,737 INFO L225 Difference]: With dead ends: 162 [2022-07-23 05:45:49,737 INFO L226 Difference]: Without dead ends: 156 [2022-07-23 05:45:49,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=79, Invalid=186, Unknown=7, NotChecked=0, Total=272 [2022-07-23 05:45:49,737 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:49,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 73 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-07-23 05:45:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-23 05:45:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-07-23 05:45:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 155 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2022-07-23 05:45:49,739 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 35 [2022-07-23 05:45:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:49,739 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2022-07-23 05:45:49,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2022-07-23 05:45:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 05:45:49,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:49,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:49,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:49,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:49,947 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1563569052, now seen corresponding path program 1 times [2022-07-23 05:45:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:49,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317247610] [2022-07-23 05:45:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:49,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:49,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:49,949 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:49,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-23 05:45:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:50,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:45:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:45:50,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:50,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-23 05:45:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:45:50,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:50,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317247610] [2022-07-23 05:45:50,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317247610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:50,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:45:50,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-23 05:45:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162096711] [2022-07-23 05:45:50,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:50,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:45:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:45:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:45:50,352 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:51,178 INFO L93 Difference]: Finished difference Result 221 states and 249 transitions. [2022-07-23 05:45:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:45:51,179 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-23 05:45:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:51,179 INFO L225 Difference]: With dead ends: 221 [2022-07-23 05:45:51,179 INFO L226 Difference]: Without dead ends: 221 [2022-07-23 05:45:51,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:45:51,180 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 200 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:51,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 167 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:45:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-23 05:45:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 156. [2022-07-23 05:45:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 155 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2022-07-23 05:45:51,182 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 37 [2022-07-23 05:45:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:51,182 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2022-07-23 05:45:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2022-07-23 05:45:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 05:45:51,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:51,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-23 05:45:51,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:51,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:51,389 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:51,389 INFO L85 PathProgramCache]: Analyzing trace with hash -377361628, now seen corresponding path program 1 times [2022-07-23 05:45:51,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:51,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592253919] [2022-07-23 05:45:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:51,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:51,391 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:51,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-23 05:45:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:51,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 05:45:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:51,500 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:45:51,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:45:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:51,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:52,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:52,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592253919] [2022-07-23 05:45:52,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592253919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:52,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:45:52,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-23 05:45:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59708699] [2022-07-23 05:45:52,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:52,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 05:45:52,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 05:45:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:45:52,731 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:53,718 INFO L93 Difference]: Finished difference Result 215 states and 240 transitions. [2022-07-23 05:45:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:45:53,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-23 05:45:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:53,720 INFO L225 Difference]: With dead ends: 215 [2022-07-23 05:45:53,720 INFO L226 Difference]: Without dead ends: 213 [2022-07-23 05:45:53,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:45:53,720 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 246 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:53,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 182 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:45:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-23 05:45:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2022-07-23 05:45:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.1581632653061225) internal successors, (227), 199 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 227 transitions. [2022-07-23 05:45:53,723 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 227 transitions. Word has length 40 [2022-07-23 05:45:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:53,723 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 227 transitions. [2022-07-23 05:45:53,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 227 transitions. [2022-07-23 05:45:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 05:45:53,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:53,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:53,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:53,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:45:53,931 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:45:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2117126329, now seen corresponding path program 1 times [2022-07-23 05:45:53,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:45:53,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50099042] [2022-07-23 05:45:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:53,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:45:53,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:45:53,933 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:45:53,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-23 05:45:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:54,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-23 05:45:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:54,109 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:45:54,110 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:45:54,258 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 15 treesize of output 11 [2022-07-23 05:45:54,330 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:45:54,330 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 47 treesize of output 51 [2022-07-23 05:45:54,349 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 9 treesize of output 4 [2022-07-23 05:45:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:54,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:54,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:45:54,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:54,898 INFO L356 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2022-07-23 05:45:54,899 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 4 case distinctions, treesize of input 39 treesize of output 33 [2022-07-23 05:45:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:45:55,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:57,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:45:57,003 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 55 treesize of output 43 [2022-07-23 05:45:57,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:57,030 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:45:57,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 82 [2022-07-23 05:45:57,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:57,059 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:45:57,060 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 43 treesize of output 51 [2022-07-23 05:45:57,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:45:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:45:57,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:45:57,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50099042] [2022-07-23 05:45:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50099042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:57,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:45:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2022-07-23 05:45:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496933570] [2022-07-23 05:45:57,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:57,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:45:57,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:45:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:45:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:45:57,779 INFO L87 Difference]: Start difference. First operand 200 states and 227 transitions. Second operand has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:01,549 INFO L93 Difference]: Finished difference Result 316 states and 355 transitions. [2022-07-23 05:46:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:46:01,550 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-23 05:46:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:01,551 INFO L225 Difference]: With dead ends: 316 [2022-07-23 05:46:01,551 INFO L226 Difference]: Without dead ends: 316 [2022-07-23 05:46:01,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=309, Invalid=2141, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 05:46:01,552 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:01,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 255 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 367 Invalid, 0 Unknown, 33 Unchecked, 0.8s Time] [2022-07-23 05:46:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-23 05:46:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 254. [2022-07-23 05:46:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.148) internal successors, (287), 253 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2022-07-23 05:46:01,555 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 42 [2022-07-23 05:46:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:01,555 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2022-07-23 05:46:01,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2022-07-23 05:46:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 05:46:01,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:01,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:01,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:01,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:01,763 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:46:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1222771824, now seen corresponding path program 1 times [2022-07-23 05:46:01,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882606041] [2022-07-23 05:46:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:01,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:01,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:01,765 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:01,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-23 05:46:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:46:01,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:01,919 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:01,919 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:46:02,174 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 17 treesize of output 13 [2022-07-23 05:46:02,490 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:02,491 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 21 treesize of output 21 [2022-07-23 05:46:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:46:02,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:03,302 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 18 treesize of output 16 [2022-07-23 05:46:03,305 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 35 treesize of output 31 [2022-07-23 05:46:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:46:04,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:04,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882606041] [2022-07-23 05:46:04,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882606041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:04,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:04,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2022-07-23 05:46:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491745255] [2022-07-23 05:46:04,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:46:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:46:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:46:04,166 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:07,985 INFO L93 Difference]: Finished difference Result 411 states and 453 transitions. [2022-07-23 05:46:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-23 05:46:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-23 05:46:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:07,988 INFO L225 Difference]: With dead ends: 411 [2022-07-23 05:46:07,988 INFO L226 Difference]: Without dead ends: 387 [2022-07-23 05:46:07,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=747, Invalid=2333, Unknown=0, NotChecked=0, Total=3080 [2022-07-23 05:46:07,989 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 607 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:07,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 210 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 05:46:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-23 05:46:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 235. [2022-07-23 05:46:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.1341991341991342) internal successors, (262), 234 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 262 transitions. [2022-07-23 05:46:07,993 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 262 transitions. Word has length 44 [2022-07-23 05:46:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:07,993 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 262 transitions. [2022-07-23 05:46:07,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 262 transitions. [2022-07-23 05:46:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 05:46:07,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:07,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:08,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:08,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:08,202 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:46:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1160738303, now seen corresponding path program 2 times [2022-07-23 05:46:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:08,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063678876] [2022-07-23 05:46:08,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:46:08,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:08,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:08,206 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:08,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-07-23 05:46:08,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:46:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-23 05:46:08,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:08,381 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:08,382 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:46:08,611 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 15 treesize of output 11 [2022-07-23 05:46:08,712 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:08,712 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 47 treesize of output 51 [2022-07-23 05:46:08,733 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 11 treesize of output 4 [2022-07-23 05:46:09,366 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-07-23 05:46:09,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 50 [2022-07-23 05:46:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:46:10,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:12,716 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:12,716 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 33 treesize of output 34 [2022-07-23 05:46:12,735 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:12,735 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 57 treesize of output 57 [2022-07-23 05:46:12,757 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:12,757 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 48 treesize of output 44 [2022-07-23 05:46:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:46:13,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:13,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063678876] [2022-07-23 05:46:13,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063678876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:13,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:13,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2022-07-23 05:46:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053702614] [2022-07-23 05:46:13,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:13,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:46:13,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:46:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:46:13,674 INFO L87 Difference]: Start difference. First operand 235 states and 262 transitions. Second operand has 33 states, 32 states have (on average 2.5625) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:19,941 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2022-07-23 05:46:19,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-23 05:46:19,942 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5625) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-23 05:46:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:19,942 INFO L225 Difference]: With dead ends: 258 [2022-07-23 05:46:19,942 INFO L226 Difference]: Without dead ends: 258 [2022-07-23 05:46:19,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=478, Invalid=2944, Unknown=0, NotChecked=0, Total=3422 [2022-07-23 05:46:19,943 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 160 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:19,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 237 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 751 Invalid, 0 Unknown, 57 Unchecked, 1.7s Time] [2022-07-23 05:46:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-23 05:46:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2022-07-23 05:46:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 245 states have (on average 1.1387755102040817) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2022-07-23 05:46:19,946 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 44 [2022-07-23 05:46:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:19,946 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2022-07-23 05:46:19,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5625) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2022-07-23 05:46:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 05:46:19,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:19,947 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:19,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:20,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:20,147 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:46:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:20,147 INFO L85 PathProgramCache]: Analyzing trace with hash -523698423, now seen corresponding path program 3 times [2022-07-23 05:46:20,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:20,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133666369] [2022-07-23 05:46:20,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:46:20,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:20,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:20,149 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:20,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-23 05:46:20,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-23 05:46:20,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:46:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:46:20,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:46:20,285 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 10 treesize of output 8 [2022-07-23 05:46:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-23 05:46:20,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:24,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:46:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-23 05:46:24,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:24,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133666369] [2022-07-23 05:46:24,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133666369] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:24,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:24,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-23 05:46:24,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391261837] [2022-07-23 05:46:24,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:46:24,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:24,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:46:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:46:24,836 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:26,280 INFO L93 Difference]: Finished difference Result 406 states and 453 transitions. [2022-07-23 05:46:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:46:26,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-23 05:46:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:26,282 INFO L225 Difference]: With dead ends: 406 [2022-07-23 05:46:26,282 INFO L226 Difference]: Without dead ends: 363 [2022-07-23 05:46:26,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:46:26,283 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 141 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:26,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 110 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 3 Unchecked, 1.2s Time] [2022-07-23 05:46:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-23 05:46:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 168. [2022-07-23 05:46:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 165 states have (on average 1.1333333333333333) internal successors, (187), 167 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2022-07-23 05:46:26,285 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 47 [2022-07-23 05:46:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:26,285 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2022-07-23 05:46:26,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2022-07-23 05:46:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 05:46:26,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:26,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:26,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:26,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:26,486 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:46:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash -773057531, now seen corresponding path program 1 times [2022-07-23 05:46:26,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:26,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42929715] [2022-07-23 05:46:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:26,488 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:26,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-07-23 05:46:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:26,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:46:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:26,613 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:26,613 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:46:26,786 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 17 treesize of output 13 [2022-07-23 05:46:27,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:27,077 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 21 treesize of output 21 [2022-07-23 05:46:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:27,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:28,959 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 18 treesize of output 16 [2022-07-23 05:46:28,968 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 35 treesize of output 31 [2022-07-23 05:46:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:46:30,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42929715] [2022-07-23 05:46:30,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42929715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:30,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2022-07-23 05:46:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911418817] [2022-07-23 05:46:30,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:30,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:46:30,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:46:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:46:30,167 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand has 32 states, 31 states have (on average 2.935483870967742) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:37,187 INFO L93 Difference]: Finished difference Result 284 states and 312 transitions. [2022-07-23 05:46:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-23 05:46:37,189 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.935483870967742) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-23 05:46:37,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:37,190 INFO L225 Difference]: With dead ends: 284 [2022-07-23 05:46:37,190 INFO L226 Difference]: Without dead ends: 284 [2022-07-23 05:46:37,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=856, Invalid=2926, Unknown=0, NotChecked=0, Total=3782 [2022-07-23 05:46:37,190 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 843 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:37,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 267 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-23 05:46:37,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-23 05:46:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 224. [2022-07-23 05:46:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 221 states have (on average 1.167420814479638) internal successors, (258), 223 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2022-07-23 05:46:37,193 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 47 [2022-07-23 05:46:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:37,193 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2022-07-23 05:46:37,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.935483870967742) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2022-07-23 05:46:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:46:37,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:37,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:37,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:37,406 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:46:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash -266869779, now seen corresponding path program 2 times [2022-07-23 05:46:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579926178] [2022-07-23 05:46:37,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:46:37,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:37,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:37,409 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:37,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-07-23 05:46:37,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:46:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-23 05:46:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:37,610 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:37,610 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:46:37,630 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 10 treesize of output 8 [2022-07-23 05:46:37,756 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 17 treesize of output 13 [2022-07-23 05:46:37,787 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 20 treesize of output 22 [2022-07-23 05:46:37,945 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:37,945 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 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 05:46:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:46:38,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:39,141 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:39,142 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 26 treesize of output 27 [2022-07-23 05:46:39,152 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:39,152 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 42 treesize of output 42 [2022-07-23 05:46:39,162 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 13 treesize of output 9 [2022-07-23 05:46:39,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:46:39,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:46:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:46:39,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579926178] [2022-07-23 05:46:39,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579926178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:39,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:39,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-07-23 05:46:39,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923224693] [2022-07-23 05:46:39,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:39,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 05:46:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:39,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 05:46:39,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2022-07-23 05:46:39,701 INFO L87 Difference]: Start difference. First operand 224 states and 258 transitions. Second operand has 19 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:45,518 INFO L93 Difference]: Finished difference Result 506 states and 591 transitions. [2022-07-23 05:46:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:46:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-23 05:46:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:45,521 INFO L225 Difference]: With dead ends: 506 [2022-07-23 05:46:45,521 INFO L226 Difference]: Without dead ends: 506 [2022-07-23 05:46:45,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=502, Invalid=1849, Unknown=1, NotChecked=0, Total=2352 [2022-07-23 05:46:45,527 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 550 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:45,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 199 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 326 Invalid, 0 Unknown, 62 Unchecked, 0.9s Time] [2022-07-23 05:46:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-23 05:46:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 418. [2022-07-23 05:46:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 415 states have (on average 1.2048192771084338) internal successors, (500), 417 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 500 transitions. [2022-07-23 05:46:45,541 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 500 transitions. Word has length 48 [2022-07-23 05:46:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:45,541 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 500 transitions. [2022-07-23 05:46:45,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 500 transitions. [2022-07-23 05:46:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:46:45,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:45,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:45,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:45,750 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:46:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1045466784, now seen corresponding path program 1 times [2022-07-23 05:46:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:45,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394591107] [2022-07-23 05:46:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:45,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:45,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:45,753 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:45,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-07-23 05:46:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:45,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-23 05:46:45,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:45,911 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:45,911 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:46:46,097 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 15 treesize of output 11 [2022-07-23 05:46:46,166 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:46,167 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 47 treesize of output 51 [2022-07-23 05:46:46,198 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 9 treesize of output 4 [2022-07-23 05:46:46,958 INFO L356 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-07-23 05:46:46,959 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 33 [2022-07-23 05:46:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:46:47,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:49,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:49,487 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 59 treesize of output 47 [2022-07-23 05:46:49,505 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:49,505 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 83 treesize of output 77 [2022-07-23 05:46:49,521 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:49,521 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 49 treesize of output 45 [2022-07-23 05:46:50,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:46:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:46:50,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394591107] [2022-07-23 05:46:50,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394591107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:50,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:50,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2022-07-23 05:46:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20585033] [2022-07-23 05:46:50,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:46:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:46:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:46:50,397 INFO L87 Difference]: Start difference. First operand 418 states and 500 transitions. Second operand has 33 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:53,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 05:46:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:57,700 INFO L93 Difference]: Finished difference Result 619 states and 734 transitions. [2022-07-23 05:46:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:46:57,701 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-23 05:46:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:57,702 INFO L225 Difference]: With dead ends: 619 [2022-07-23 05:46:57,702 INFO L226 Difference]: Without dead ends: 619 [2022-07-23 05:46:57,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=478, Invalid=3428, Unknown=0, NotChecked=0, Total=3906 [2022-07-23 05:46:57,703 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 165 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:57,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 496 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 733 Invalid, 1 Unknown, 233 Unchecked, 3.4s Time] [2022-07-23 05:46:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-07-23 05:46:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 447. [2022-07-23 05:46:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 444 states have (on average 1.1981981981981982) internal successors, (532), 446 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 532 transitions. [2022-07-23 05:46:57,708 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 532 transitions. Word has length 53 [2022-07-23 05:46:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:57,708 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 532 transitions. [2022-07-23 05:46:57,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 532 transitions. [2022-07-23 05:46:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-23 05:46:57,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:57,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:57,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:57,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:57,917 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:46:57,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:57,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1088915937, now seen corresponding path program 3 times [2022-07-23 05:46:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:57,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207279618] [2022-07-23 05:46:57,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:46:57,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:57,919 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:57,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-07-23 05:46:58,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-23 05:46:58,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 05:46:58,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:58,106 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 10 treesize of output 8 [2022-07-23 05:46:58,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:46:58,332 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 17 treesize of output 13 [2022-07-23 05:46:58,372 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 20 treesize of output 22 [2022-07-23 05:46:58,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:46:58,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-23 05:46:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:46:58,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:58,847 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:58,847 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 27 treesize of output 28 [2022-07-23 05:46:58,856 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:58,856 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 44 treesize of output 44 [2022-07-23 05:46:58,861 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 14 treesize of output 10 [2022-07-23 05:46:59,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:46:59,197 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 10 treesize of output 8 [2022-07-23 05:46:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:46:59,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207279618] [2022-07-23 05:46:59,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207279618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:59,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:59,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-23 05:46:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53575245] [2022-07-23 05:46:59,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 05:46:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 05:46:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2022-07-23 05:46:59,244 INFO L87 Difference]: Start difference. First operand 447 states and 532 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:59,931 INFO L93 Difference]: Finished difference Result 553 states and 645 transitions. [2022-07-23 05:46:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:46:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-23 05:46:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:59,933 INFO L225 Difference]: With dead ends: 553 [2022-07-23 05:46:59,933 INFO L226 Difference]: Without dead ends: 521 [2022-07-23 05:46:59,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=451, Unknown=1, NotChecked=0, Total=600 [2022-07-23 05:46:59,934 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:59,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 178 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 217 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-07-23 05:46:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-23 05:46:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 516. [2022-07-23 05:46:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 513 states have (on average 1.1832358674463939) internal successors, (607), 515 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 607 transitions. [2022-07-23 05:46:59,939 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 607 transitions. Word has length 55 [2022-07-23 05:46:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:59,939 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 607 transitions. [2022-07-23 05:46:59,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 607 transitions. [2022-07-23 05:46:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-23 05:46:59,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:59,940 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:59,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:47:00,149 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:47:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1167271231, now seen corresponding path program 3 times [2022-07-23 05:47:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:47:00,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474716526] [2022-07-23 05:47:00,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:47:00,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:47:00,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:47:00,151 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:47:00,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-07-23 05:47:00,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 05:47:00,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:00,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 05:47:00,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:00,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:47:00,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:47:00,401 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 10 treesize of output 8 [2022-07-23 05:47:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:47:00,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:02,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:47:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:47:02,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:47:02,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474716526] [2022-07-23 05:47:02,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474716526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:02,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:47:02,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-23 05:47:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587783614] [2022-07-23 05:47:02,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:47:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:47:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:47:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:47:02,424 INFO L87 Difference]: Start difference. First operand 516 states and 607 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:08,420 INFO L93 Difference]: Finished difference Result 932 states and 1100 transitions. [2022-07-23 05:47:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:47:08,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-23 05:47:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:08,423 INFO L225 Difference]: With dead ends: 932 [2022-07-23 05:47:08,423 INFO L226 Difference]: Without dead ends: 898 [2022-07-23 05:47:08,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=408, Invalid=1572, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 05:47:08,424 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 248 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:08,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 361 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-23 05:47:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-23 05:47:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 503. [2022-07-23 05:47:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 500 states have (on average 1.19) internal successors, (595), 502 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 595 transitions. [2022-07-23 05:47:08,433 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 595 transitions. Word has length 58 [2022-07-23 05:47:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:08,433 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 595 transitions. [2022-07-23 05:47:08,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 595 transitions. [2022-07-23 05:47:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:47:08,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:08,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:08,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:08,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:47:08,642 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:47:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash 421187170, now seen corresponding path program 4 times [2022-07-23 05:47:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:47:08,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231503513] [2022-07-23 05:47:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:47:08,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:47:08,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:47:08,644 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:47:08,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-07-23 05:47:08,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:47:08,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:08,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-23 05:47:08,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:08,840 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:47:08,840 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:47:09,287 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 17 treesize of output 13 [2022-07-23 05:47:09,812 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:09,813 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 21 treesize of output 21 [2022-07-23 05:47:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:47:10,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:10,873 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 18 treesize of output 16 [2022-07-23 05:47:10,876 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 35 treesize of output 31 [2022-07-23 05:47:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:47:13,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:47:13,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231503513] [2022-07-23 05:47:13,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231503513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:13,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:47:13,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2022-07-23 05:47:13,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498989615] [2022-07-23 05:47:13,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:13,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-23 05:47:13,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:47:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-23 05:47:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 05:47:13,351 INFO L87 Difference]: Start difference. First operand 503 states and 595 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:19,939 INFO L93 Difference]: Finished difference Result 1259 states and 1446 transitions. [2022-07-23 05:47:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-23 05:47:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-23 05:47:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:19,943 INFO L225 Difference]: With dead ends: 1259 [2022-07-23 05:47:19,943 INFO L226 Difference]: Without dead ends: 1211 [2022-07-23 05:47:19,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1317, Invalid=5003, Unknown=0, NotChecked=0, Total=6320 [2022-07-23 05:47:19,949 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1157 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:19,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 436 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-23 05:47:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-07-23 05:47:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 639. [2022-07-23 05:47:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 636 states have (on average 1.1682389937106918) internal successors, (743), 638 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 743 transitions. [2022-07-23 05:47:19,957 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 743 transitions. Word has length 59 [2022-07-23 05:47:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:19,957 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 743 transitions. [2022-07-23 05:47:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 743 transitions. [2022-07-23 05:47:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-23 05:47:19,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:19,958 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:19,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:20,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:47:20,167 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:47:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1901256603, now seen corresponding path program 5 times [2022-07-23 05:47:20,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:47:20,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756588837] [2022-07-23 05:47:20,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:47:20,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:47:20,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:47:20,169 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:47:20,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-07-23 05:47:20,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-23 05:47:20,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:20,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:47:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:20,465 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:47:20,465 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:47:21,242 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 15 treesize of output 11 [2022-07-23 05:47:21,346 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:47:21,346 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 47 treesize of output 51 [2022-07-23 05:47:21,378 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 11 treesize of output 4 [2022-07-23 05:47:22,676 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:22,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 98 [2022-07-23 05:47:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:47:23,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:27,362 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:27,363 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 73 treesize of output 49 [2022-07-23 05:47:27,406 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:27,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 141 [2022-07-23 05:47:27,434 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:27,434 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 86 treesize of output 82 [2022-07-23 05:47:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:47:31,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:47:31,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756588837] [2022-07-23 05:47:31,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756588837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:31,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:47:31,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 47 [2022-07-23 05:47:31,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434454882] [2022-07-23 05:47:31,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:31,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 05:47:31,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:47:31,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 05:47:31,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2043, Unknown=1, NotChecked=0, Total=2256 [2022-07-23 05:47:31,993 INFO L87 Difference]: Start difference. First operand 639 states and 743 transitions. Second operand has 48 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:39,911 INFO L93 Difference]: Finished difference Result 729 states and 839 transitions. [2022-07-23 05:47:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-23 05:47:39,913 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-23 05:47:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:39,914 INFO L225 Difference]: With dead ends: 729 [2022-07-23 05:47:39,914 INFO L226 Difference]: Without dead ends: 729 [2022-07-23 05:47:39,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=525, Invalid=5634, Unknown=3, NotChecked=0, Total=6162 [2022-07-23 05:47:39,915 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 167 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:39,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 488 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 260 Invalid, 0 Unknown, 292 Unchecked, 0.6s Time] [2022-07-23 05:47:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-07-23 05:47:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 639. [2022-07-23 05:47:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 636 states have (on average 1.1650943396226414) internal successors, (741), 638 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 741 transitions. [2022-07-23 05:47:39,920 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 741 transitions. Word has length 63 [2022-07-23 05:47:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:39,920 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 741 transitions. [2022-07-23 05:47:39,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 741 transitions. [2022-07-23 05:47:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 05:47:39,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:39,921 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:39,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:40,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:47:40,123 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:47:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1595400406, now seen corresponding path program 2 times [2022-07-23 05:47:40,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:47:40,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735414733] [2022-07-23 05:47:40,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:47:40,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:47:40,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:47:40,125 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:47:40,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-07-23 05:47:40,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:47:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:40,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:47:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:40,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:47:40,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:47:40,295 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 10 treesize of output 8 [2022-07-23 05:47:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:47:40,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:42,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:47:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:47:42,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:47:42,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735414733] [2022-07-23 05:47:42,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735414733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:42,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:47:42,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-23 05:47:42,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853366474] [2022-07-23 05:47:42,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:42,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:47:42,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:47:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:47:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:47:42,477 INFO L87 Difference]: Start difference. First operand 639 states and 741 transitions. Second operand has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:43,998 INFO L93 Difference]: Finished difference Result 1055 states and 1211 transitions. [2022-07-23 05:47:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:47:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-23 05:47:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:44,001 INFO L225 Difference]: With dead ends: 1055 [2022-07-23 05:47:44,001 INFO L226 Difference]: Without dead ends: 987 [2022-07-23 05:47:44,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:47:44,001 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 335 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:44,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 230 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:47:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-07-23 05:47:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 966. [2022-07-23 05:47:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 963 states have (on average 1.1651090342679127) internal successors, (1122), 965 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1122 transitions. [2022-07-23 05:47:44,009 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1122 transitions. Word has length 68 [2022-07-23 05:47:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:44,009 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1122 transitions. [2022-07-23 05:47:44,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1122 transitions. [2022-07-23 05:47:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 05:47:44,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:44,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:44,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:44,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:47:44,218 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:47:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash -393901537, now seen corresponding path program 2 times [2022-07-23 05:47:44,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:47:44,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432251147] [2022-07-23 05:47:44,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:47:44,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:47:44,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:47:44,221 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:47:44,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-07-23 05:47:44,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:47:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:44,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:47:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:44,407 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 10 treesize of output 8 [2022-07-23 05:47:44,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:47:44,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:47:44,682 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 20 treesize of output 22 [2022-07-23 05:47:45,231 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:45,231 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 21 treesize of output 21 [2022-07-23 05:47:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:47:45,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:47,160 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:47,160 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 26 treesize of output 27 [2022-07-23 05:47:47,172 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:47:47,172 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 42 treesize of output 42 [2022-07-23 05:47:47,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:47:48,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:47:48,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:47:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:47:48,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:47:48,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432251147] [2022-07-23 05:47:48,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432251147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:48,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:47:48,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2022-07-23 05:47:48,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282538] [2022-07-23 05:47:48,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:48,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:47:48,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:47:48,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:47:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=853, Unknown=1, NotChecked=0, Total=992 [2022-07-23 05:47:48,179 INFO L87 Difference]: Start difference. First operand 966 states and 1122 transitions. Second operand has 32 states, 31 states have (on average 4.064516129032258) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:51,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 05:47:54,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 05:47:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:58,000 INFO L93 Difference]: Finished difference Result 1375 states and 1584 transitions. [2022-07-23 05:47:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:47:58,002 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.064516129032258) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-23 05:47:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:58,004 INFO L225 Difference]: With dead ends: 1375 [2022-07-23 05:47:58,004 INFO L226 Difference]: Without dead ends: 1299 [2022-07-23 05:47:58,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=661, Invalid=2308, Unknown=1, NotChecked=0, Total=2970 [2022-07-23 05:47:58,005 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 734 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 98 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:58,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 417 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 678 Invalid, 2 Unknown, 26 Unchecked, 5.4s Time] [2022-07-23 05:47:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-07-23 05:47:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 875. [2022-07-23 05:47:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 872 states have (on average 1.1743119266055047) internal successors, (1024), 874 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1024 transitions. [2022-07-23 05:47:58,020 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1024 transitions. Word has length 68 [2022-07-23 05:47:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:58,020 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1024 transitions. [2022-07-23 05:47:58,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.064516129032258) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1024 transitions. [2022-07-23 05:47:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-23 05:47:58,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:58,028 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:58,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:47:58,232 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:47:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -151731545, now seen corresponding path program 6 times [2022-07-23 05:47:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:47:58,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528480342] [2022-07-23 05:47:58,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:47:58,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:47:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:47:58,234 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:47:58,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-07-23 05:47:58,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-23 05:47:58,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:58,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 05:47:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:58,495 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 10 treesize of output 8 [2022-07-23 05:47:58,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:47:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:47:59,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:01,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:48:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:48:01,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:48:01,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528480342] [2022-07-23 05:48:01,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528480342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:01,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:48:01,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-23 05:48:01,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654842889] [2022-07-23 05:48:01,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 05:48:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:48:01,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 05:48:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:48:01,569 INFO L87 Difference]: Start difference. First operand 875 states and 1024 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:08,495 INFO L93 Difference]: Finished difference Result 856 states and 988 transitions. [2022-07-23 05:48:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:48:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-23 05:48:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:08,498 INFO L225 Difference]: With dead ends: 856 [2022-07-23 05:48:08,498 INFO L226 Difference]: Without dead ends: 851 [2022-07-23 05:48:08,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2022-07-23 05:48:08,498 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 298 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:08,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 477 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-23 05:48:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-07-23 05:48:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 839. [2022-07-23 05:48:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 836 states have (on average 1.167464114832536) internal successors, (976), 838 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 976 transitions. [2022-07-23 05:48:08,517 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 976 transitions. Word has length 70 [2022-07-23 05:48:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:08,518 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 976 transitions. [2022-07-23 05:48:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 976 transitions. [2022-07-23 05:48:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-23 05:48:08,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:08,519 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:08,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:08,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:48:08,727 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:48:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash -455822696, now seen corresponding path program 4 times [2022-07-23 05:48:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:48:08,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498362237] [2022-07-23 05:48:08,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:48:08,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:48:08,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:48:08,729 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:48:08,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-07-23 05:48:08,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:48:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:08,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 05:48:08,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:08,892 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:48:08,892 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:48:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:48:09,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:48:11,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:48:11,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498362237] [2022-07-23 05:48:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498362237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:11,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:48:11,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-23 05:48:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214781803] [2022-07-23 05:48:11,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:11,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:48:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:48:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:48:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:48:11,467 INFO L87 Difference]: Start difference. First operand 839 states and 976 transitions. Second operand has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:14,286 INFO L93 Difference]: Finished difference Result 1365 states and 1543 transitions. [2022-07-23 05:48:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:48:14,287 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-23 05:48:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:14,290 INFO L225 Difference]: With dead ends: 1365 [2022-07-23 05:48:14,290 INFO L226 Difference]: Without dead ends: 1346 [2022-07-23 05:48:14,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=428, Invalid=1642, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:48:14,290 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 532 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:14,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 522 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-23 05:48:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-07-23 05:48:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1197. [2022-07-23 05:48:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1194 states have (on average 1.1574539363484087) internal successors, (1382), 1196 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1382 transitions. [2022-07-23 05:48:14,299 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1382 transitions. Word has length 70 [2022-07-23 05:48:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:14,299 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1382 transitions. [2022-07-23 05:48:14,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1382 transitions. [2022-07-23 05:48:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-23 05:48:14,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:14,301 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:14,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:14,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:48:14,508 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:48:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1107736891, now seen corresponding path program 7 times [2022-07-23 05:48:14,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:48:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540391581] [2022-07-23 05:48:14,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:48:14,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:48:14,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:48:14,511 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:48:14,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-07-23 05:48:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-23 05:48:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:14,745 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:48:14,746 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:48:15,396 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:48:15,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 40 [2022-07-23 05:48:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:48:16,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:17,984 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-23 05:48:17,984 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 15 treesize of output 15 [2022-07-23 05:48:20,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:48:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:48:20,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:48:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540391581] [2022-07-23 05:48:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540391581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:20,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:48:20,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-07-23 05:48:20,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329892868] [2022-07-23 05:48:20,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:20,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:48:20,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:48:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:48:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:48:20,379 INFO L87 Difference]: Start difference. First operand 1197 states and 1382 transitions. Second operand has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:25,071 INFO L93 Difference]: Finished difference Result 1268 states and 1453 transitions. [2022-07-23 05:48:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 05:48:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-23 05:48:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:25,075 INFO L225 Difference]: With dead ends: 1268 [2022-07-23 05:48:25,075 INFO L226 Difference]: Without dead ends: 1200 [2022-07-23 05:48:25,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=381, Invalid=2271, Unknown=0, NotChecked=0, Total=2652 [2022-07-23 05:48:25,075 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 232 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:25,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 478 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 863 Invalid, 0 Unknown, 83 Unchecked, 2.0s Time] [2022-07-23 05:48:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-07-23 05:48:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1197. [2022-07-23 05:48:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1194 states have (on average 1.1557788944723617) internal successors, (1380), 1196 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1380 transitions. [2022-07-23 05:48:25,084 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1380 transitions. Word has length 74 [2022-07-23 05:48:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:25,085 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1380 transitions. [2022-07-23 05:48:25,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1380 transitions. [2022-07-23 05:48:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-23 05:48:25,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:25,108 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:25,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:25,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:48:25,316 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:48:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:25,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1176796164, now seen corresponding path program 8 times [2022-07-23 05:48:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:48:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454105605] [2022-07-23 05:48:25,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:48:25,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:48:25,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:48:25,318 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:48:25,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-07-23 05:48:25,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:48:25,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-23 05:48:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:25,557 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:48:25,558 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:48:25,572 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 10 treesize of output 8 [2022-07-23 05:48:26,205 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 17 treesize of output 13 [2022-07-23 05:48:27,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:48:27,224 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-23 05:48:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:48:27,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:29,577 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 18 treesize of output 16 [2022-07-23 05:48:29,585 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 35 treesize of output 31 [2022-07-23 05:48:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:48:33,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:48:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454105605] [2022-07-23 05:48:33,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454105605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:33,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:48:33,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2022-07-23 05:48:33,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59135291] [2022-07-23 05:48:33,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:33,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-23 05:48:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:48:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-23 05:48:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2022-07-23 05:48:33,291 INFO L87 Difference]: Start difference. First operand 1197 states and 1380 transitions. Second operand has 41 states, 41 states have (on average 3.1707317073170733) internal successors, (130), 41 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)