./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 08:54:49,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 08:54:49,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 08:54:49,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 08:54:49,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 08:54:49,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 08:54:49,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 08:54:49,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 08:54:49,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 08:54:49,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 08:54:49,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 08:54:49,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 08:54:49,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 08:54:49,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 08:54:49,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 08:54:49,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 08:54:49,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 08:54:49,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 08:54:49,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 08:54:49,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 08:54:49,567 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 08:54:49,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 08:54:49,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 08:54:49,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 08:54:49,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 08:54:49,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 08:54:49,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 08:54:49,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 08:54:49,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 08:54:49,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 08:54:49,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 08:54:49,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 08:54:49,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 08:54:49,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 08:54:49,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 08:54:49,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 08:54:49,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 08:54:49,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 08:54:49,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 08:54:49,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 08:54:49,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 08:54:49,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 08:54:49,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 08:54:49,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 08:54:49,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 08:54:49,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 08:54:49,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 08:54:49,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 08:54:49,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 08:54:49,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 08:54:49,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 08:54:49,620 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 08:54:49,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 08:54:49,621 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 08:54:49,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 08:54:49,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 08:54:49,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 08:54:49,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 08:54:49,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 08:54:49,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 08:54:49,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 08:54:49,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 08:54:49,624 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 08:54:49,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 08:54:49,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 08:54:49,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 08:54:49,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 08:54:49,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:54:49,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 08:54:49,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 08:54:49,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 08:54:49,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 08:54:49,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 08:54:49,626 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 08:54:49,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 08:54:49,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 08:54:49,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 [2022-07-19 08:54:49,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 08:54:49,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 08:54:49,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 08:54:49,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 08:54:49,872 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 08:54:49,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-07-19 08:54:49,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/030030dfe/0709cc2ea00149ba826ac924687de7dd/FLAGa793ceafe [2022-07-19 08:54:50,357 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 08:54:50,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-07-19 08:54:50,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/030030dfe/0709cc2ea00149ba826ac924687de7dd/FLAGa793ceafe [2022-07-19 08:54:50,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/030030dfe/0709cc2ea00149ba826ac924687de7dd [2022-07-19 08:54:50,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 08:54:50,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 08:54:50,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 08:54:50,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 08:54:50,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 08:54:50,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:54:50" (1/1) ... [2022-07-19 08:54:50,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16da52f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:50, skipping insertion in model container [2022-07-19 08:54:50,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:54:50" (1/1) ... [2022-07-19 08:54:50,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 08:54:50,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 08:54:50,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-07-19 08:54:50,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:54:50,974 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 08:54:50,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-07-19 08:54:51,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:54:51,023 INFO L208 MainTranslator]: Completed translation [2022-07-19 08:54:51,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51 WrapperNode [2022-07-19 08:54:51,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 08:54:51,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 08:54:51,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 08:54:51,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 08:54:51,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,066 INFO L137 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-07-19 08:54:51,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 08:54:51,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 08:54:51,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 08:54:51,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 08:54:51,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 08:54:51,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 08:54:51,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 08:54:51,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 08:54:51,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (1/1) ... [2022-07-19 08:54:51,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:54:51,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:51,136 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) [2022-07-19 08:54:51,154 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 [2022-07-19 08:54:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 08:54:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 08:54:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 08:54:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 08:54:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 08:54:51,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 08:54:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 08:54:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 08:54:51,255 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 08:54:51,256 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 08:54:51,463 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 08:54:51,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 08:54:51,469 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 08:54:51,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:54:51 BoogieIcfgContainer [2022-07-19 08:54:51,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 08:54:51,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 08:54:51,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 08:54:51,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 08:54:51,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:54:50" (1/3) ... [2022-07-19 08:54:51,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6118a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:54:51, skipping insertion in model container [2022-07-19 08:54:51,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:51" (2/3) ... [2022-07-19 08:54:51,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6118a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:54:51, skipping insertion in model container [2022-07-19 08:54:51,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:54:51" (3/3) ... [2022-07-19 08:54:51,488 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2022-07-19 08:54:51,500 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 08:54:51,515 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 08:54:51,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 08:54:51,578 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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@7fd9171f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e2676e [2022-07-19 08:54:51,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 08:54:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 08:54:51,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:51,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:51,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2053894623, now seen corresponding path program 1 times [2022-07-19 08:54:51,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:51,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685496093] [2022-07-19 08:54:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:54:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685496093] [2022-07-19 08:54:51,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685496093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:54:51,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:54:51,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 08:54:51,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035284657] [2022-07-19 08:54:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:54:51,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:54:51,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:54:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:54:51,867 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:51,899 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2022-07-19 08:54:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:54:51,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2022-07-19 08:54:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:51,909 INFO L225 Difference]: With dead ends: 46 [2022-07-19 08:54:51,909 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 08:54:51,913 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 [2022-07-19 08:54:51,917 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:51,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 08:54:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-07-19 08:54:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2022-07-19 08:54:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-19 08:54:51,952 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-07-19 08:54:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:51,953 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-19 08:54:51,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-19 08:54:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 08:54:51,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:51,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 08:54:51,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:51,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash -418223009, now seen corresponding path program 1 times [2022-07-19 08:54:51,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:51,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528592587] [2022-07-19 08:54:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:51,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:54:52,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528592587] [2022-07-19 08:54:52,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528592587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481582892] [2022-07-19 08:54:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:52,031 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) [2022-07-19 08:54:52,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 08:54:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 08:54:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:52,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:54:52,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481582892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:54:52,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:54:52,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 08:54:52,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966902881] [2022-07-19 08:54:52,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:54:52,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:54:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:54:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:52,137 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:52,191 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-19 08:54:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:54:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-07-19 08:54:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:52,192 INFO L225 Difference]: With dead ends: 40 [2022-07-19 08:54:52,193 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 08:54:52,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:52,194 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:52,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 08:54:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-07-19 08:54:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2022-07-19 08:54:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-19 08:54:52,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2022-07-19 08:54:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:52,199 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-19 08:54:52,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-19 08:54:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 08:54:52,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:52,200 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] [2022-07-19 08:54:52,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:52,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:52,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash 241580185, now seen corresponding path program 1 times [2022-07-19 08:54:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:52,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944479339] [2022-07-19 08:54:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:52,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:54:52,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:52,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944479339] [2022-07-19 08:54:52,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944479339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:52,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447662092] [2022-07-19 08:54:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:52,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:52,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:52,448 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) [2022-07-19 08:54:52,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 08:54:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:54:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:54:52,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:54:52,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447662092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:52,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:52,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 08:54:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635144090] [2022-07-19 08:54:52,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:52,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 08:54:52,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 08:54:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:54:52,626 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) [2022-07-19 08:54:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:52,660 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-07-19 08:54:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 08:54:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 21 [2022-07-19 08:54:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:52,661 INFO L225 Difference]: With dead ends: 49 [2022-07-19 08:54:52,661 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 08:54:52,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:54:52,664 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:52,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 08:54:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-19 08:54:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 08:54:52,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2022-07-19 08:54:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:52,674 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 08:54:52,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) [2022-07-19 08:54:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 08:54:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 08:54:52,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:52,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:52,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:52,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 08:54:52,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:52,900 INFO L85 PathProgramCache]: Analyzing trace with hash 886739667, now seen corresponding path program 2 times [2022-07-19 08:54:52,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:52,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455307979] [2022-07-19 08:54:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:52,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 08:54:52,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:52,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455307979] [2022-07-19 08:54:52,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455307979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:52,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583714902] [2022-07-19 08:54:52,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:54:52,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:52,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:52,954 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) [2022-07-19 08:54:52,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 08:54:53,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:54:53,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 08:54:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:54:53,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:54:53,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583714902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:53,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:53,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-19 08:54:53,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599525331] [2022-07-19 08:54:53,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:53,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 08:54:53,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 08:54:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 08:54:53,169 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:53,246 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-07-19 08:54:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 08:54:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2022-07-19 08:54:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:53,248 INFO L225 Difference]: With dead ends: 70 [2022-07-19 08:54:53,248 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 08:54:53,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 08:54:53,250 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:53,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 08:54:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-07-19 08:54:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 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) [2022-07-19 08:54:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-19 08:54:53,257 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 27 [2022-07-19 08:54:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:53,258 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-19 08:54:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-19 08:54:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 08:54:53,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:53,259 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:53,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:53,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:53,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1464945409, now seen corresponding path program 3 times [2022-07-19 08:54:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:53,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649108816] [2022-07-19 08:54:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:53,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 08:54:53,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:53,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649108816] [2022-07-19 08:54:53,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649108816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:53,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212386318] [2022-07-19 08:54:53,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:54:53,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:53,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:53,684 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) [2022-07-19 08:54:53,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 08:54:53,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 08:54:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 08:54:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 08:54:53,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 08:54:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212386318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:53,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:53,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-19 08:54:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809994843] [2022-07-19 08:54:53,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 08:54:53,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 08:54:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-19 08:54:53,872 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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) [2022-07-19 08:54:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:53,994 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-07-19 08:54:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 08:54:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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) Word has length 45 [2022-07-19 08:54:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:53,995 INFO L225 Difference]: With dead ends: 100 [2022-07-19 08:54:53,996 INFO L226 Difference]: Without dead ends: 75 [2022-07-19 08:54:53,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-19 08:54:53,997 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:53,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 62 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-19 08:54:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-07-19 08:54:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-07-19 08:54:54,005 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 45 [2022-07-19 08:54:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:54,006 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-07-19 08:54:54,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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) [2022-07-19 08:54:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-07-19 08:54:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 08:54:54,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:54,008 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:54,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:54,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:54,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1964985639, now seen corresponding path program 4 times [2022-07-19 08:54:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:54,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451744240] [2022-07-19 08:54:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 08:54:54,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:54,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451744240] [2022-07-19 08:54:54,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451744240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:54,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226926049] [2022-07-19 08:54:54,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 08:54:54,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:54,467 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) [2022-07-19 08:54:54,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 08:54:54,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 08:54:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 08:54:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-19 08:54:54,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-19 08:54:54,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226926049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:54,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:54,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2022-07-19 08:54:54,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610247946] [2022-07-19 08:54:54,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:54,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 08:54:54,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:54,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 08:54:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-07-19 08:54:54,813 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:55,032 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2022-07-19 08:54:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 08:54:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 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 71 [2022-07-19 08:54:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:55,034 INFO L225 Difference]: With dead ends: 174 [2022-07-19 08:54:55,034 INFO L226 Difference]: Without dead ends: 125 [2022-07-19 08:54:55,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-07-19 08:54:55,036 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:55,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 127 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 08:54:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-19 08:54:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-07-19 08:54:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 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) [2022-07-19 08:54:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-07-19 08:54:55,047 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 71 [2022-07-19 08:54:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:55,047 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-07-19 08:54:55,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-07-19 08:54:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-19 08:54:55,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:55,051 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:55,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:55,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:55,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1940480587, now seen corresponding path program 5 times [2022-07-19 08:54:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:55,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918715280] [2022-07-19 08:54:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:55,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2022-07-19 08:54:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:55,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918715280] [2022-07-19 08:54:55,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918715280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:55,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473663483] [2022-07-19 08:54:55,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 08:54:55,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:55,539 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) [2022-07-19 08:54:55,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process